[f07e037] | 1 | // |
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| 2 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo |
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| 3 | // |
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| 4 | // The contents of this file are covered under the licence agreement in the |
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| 5 | // file "LICENCE" distributed with Cforall. |
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| 6 | // |
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[84c52a8] | 7 | // monitor_desc.c -- |
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[f07e037] | 8 | // |
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| 9 | // Author : Thierry Delisle |
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| 10 | // Created On : Thd Feb 23 12:27:26 2017 |
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[6b0b624] | 11 | // Last Modified By : Peter A. Buhr |
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[121be3e] | 12 | // Last Modified On : Wed Dec 4 07:55:14 2019 |
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| 13 | // Update Count : 10 |
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[f07e037] | 14 | // |
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| 15 | |
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[2026bb6] | 16 | #define __cforall_thread__ |
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| 17 | |
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[58b6d1b] | 18 | #include "monitor.hfa" |
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[f07e037] | 19 | |
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[73abe95] | 20 | #include <stdlib.hfa> |
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[2f6a7e93] | 21 | #include <inttypes.h> |
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[a933dcf4] | 22 | |
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[73abe95] | 23 | #include "kernel_private.hfa" |
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[f07e037] | 24 | |
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[58b6d1b] | 25 | #include "bits/algorithm.hfa" |
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[de737c8] | 26 | |
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[0c78741] | 27 | //----------------------------------------------------------------------------- |
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| 28 | // Forward declarations |
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[daacf82] | 29 | static inline void set_owner ( monitor_desc * this, thread_desc * owner ); |
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[513daec] | 30 | static inline void set_owner ( monitor_desc * storage [], __lock_size_t count, thread_desc * owner ); |
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| 31 | static inline void set_mask ( monitor_desc * storage [], __lock_size_t count, const __waitfor_mask_t & mask ); |
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[daacf82] | 32 | static inline void reset_mask( monitor_desc * this ); |
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[6ff4507] | 33 | |
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[0c78741] | 34 | static inline thread_desc * next_thread( monitor_desc * this ); |
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[6ae8c92] | 35 | static inline bool is_accepted( monitor_desc * this, const __monitor_group_t & monitors ); |
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[0c78741] | 36 | |
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[ea7d2b0] | 37 | static inline void lock_all ( __spinlock_t * locks [], __lock_size_t count ); |
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| 38 | static inline void lock_all ( monitor_desc * source [], __spinlock_t * /*out*/ locks [], __lock_size_t count ); |
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| 39 | static inline void unlock_all( __spinlock_t * locks [], __lock_size_t count ); |
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[513daec] | 40 | static inline void unlock_all( monitor_desc * locks [], __lock_size_t count ); |
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[0c78741] | 41 | |
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[ea7d2b0] | 42 | static inline void save ( monitor_desc * ctx [], __lock_size_t count, __spinlock_t * locks [], unsigned int /*out*/ recursions [], __waitfor_mask_t /*out*/ masks [] ); |
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| 43 | static inline void restore( monitor_desc * ctx [], __lock_size_t count, __spinlock_t * locks [], unsigned int /*in */ recursions [], __waitfor_mask_t /*in */ masks [] ); |
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[0c78741] | 44 | |
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[513daec] | 45 | static inline void init ( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ); |
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| 46 | static inline void init_push( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ); |
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[97e3296] | 47 | |
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[6ff4507] | 48 | static inline thread_desc * check_condition ( __condition_criterion_t * ); |
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[4cedd9f] | 49 | static inline void brand_condition ( condition & ); |
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[59a0bde] | 50 | static inline [thread_desc *, int] search_entry_queue( const __waitfor_mask_t &, monitor_desc * monitors [], __lock_size_t count ); |
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[b18830e] | 51 | |
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[6ff4507] | 52 | forall(dtype T | sized( T )) |
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[59a0bde] | 53 | static inline __lock_size_t insert_unique( T * array [], __lock_size_t & size, T * val ); |
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| 54 | static inline __lock_size_t count_max ( const __waitfor_mask_t & mask ); |
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| 55 | static inline __lock_size_t aggregate ( monitor_desc * storage [], const __waitfor_mask_t & mask ); |
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[97e3296] | 56 | |
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| 57 | //----------------------------------------------------------------------------- |
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| 58 | // Useful defines |
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[6ff4507] | 59 | #define wait_ctx(thrd, user_info) /* Create the necessary information to use the signaller stack */ \ |
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| 60 | __condition_node_t waiter = { thrd, count, user_info }; /* Create the node specific to this wait operation */ \ |
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| 61 | __condition_criterion_t criteria[count]; /* Create the creteria this wait operation needs to wake up */ \ |
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[8fc45b7] | 62 | init( count, monitors, waiter, criteria ); /* Link everything together */ \ |
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[6ff4507] | 63 | |
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| 64 | #define wait_ctx_primed(thrd, user_info) /* Create the necessary information to use the signaller stack */ \ |
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| 65 | __condition_node_t waiter = { thrd, count, user_info }; /* Create the node specific to this wait operation */ \ |
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| 66 | __condition_criterion_t criteria[count]; /* Create the creteria this wait operation needs to wake up */ \ |
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[8fc45b7] | 67 | init_push( count, monitors, waiter, criteria ); /* Link everything together and push it to the AS-Stack */ \ |
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[6ff4507] | 68 | |
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| 69 | #define monitor_ctx( mons, cnt ) /* Define that create the necessary struct for internal/external scheduling operations */ \ |
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| 70 | monitor_desc ** monitors = mons; /* Save the targeted monitors */ \ |
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[59a0bde] | 71 | __lock_size_t count = cnt; /* Save the count to a local variable */ \ |
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[6ff4507] | 72 | unsigned int recursions[ count ]; /* Save the current recursion levels to restore them later */ \ |
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[4cedd9f] | 73 | __waitfor_mask_t masks [ count ]; /* Save the current waitfor masks to restore them later */ \ |
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[ea7d2b0] | 74 | __spinlock_t * locks [ count ]; /* We need to pass-in an array of locks to BlockInternal */ \ |
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[6ff4507] | 75 | |
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| 76 | #define monitor_save save ( monitors, count, locks, recursions, masks ) |
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| 77 | #define monitor_restore restore( monitors, count, locks, recursions, masks ) |
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| 78 | |
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[97e3296] | 79 | |
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[0c78741] | 80 | //----------------------------------------------------------------------------- |
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| 81 | // Enter/Leave routines |
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[690f13c] | 82 | |
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| 83 | |
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[cb0e6de] | 84 | extern "C" { |
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[97e3296] | 85 | // Enter single monitor |
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[a843067] | 86 | static void __enter_monitor_desc( monitor_desc * this, const __monitor_group_t & group ) { |
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[34c6c767] | 87 | // Lock the monitor spinlock |
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[2e9aed4] | 88 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[14a61b5] | 89 | // Interrupts disable inside critical section |
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| 90 | thread_desc * thrd = kernelTLS.this_thread; |
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[f07e037] | 91 | |
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[169d944] | 92 | __cfaabi_dbg_print_safe( "Kernel : %10p Entering mon %p (%p)\n", thrd, this, this->owner); |
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[90c4df0] | 93 | |
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[cb0e6de] | 94 | if( !this->owner ) { |
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[97e3296] | 95 | // No one has the monitor, just take it |
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[cd348e7] | 96 | set_owner( this, thrd ); |
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[90c4df0] | 97 | |
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[169d944] | 98 | __cfaabi_dbg_print_safe( "Kernel : mon is free \n" ); |
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[cb0e6de] | 99 | } |
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| 100 | else if( this->owner == thrd) { |
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[549c006] | 101 | // We already have the monitor, just note how many times we took it |
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[cb0e6de] | 102 | this->recursion += 1; |
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[90c4df0] | 103 | |
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[169d944] | 104 | __cfaabi_dbg_print_safe( "Kernel : mon already owned \n" ); |
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[cb0e6de] | 105 | } |
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[6ae8c92] | 106 | else if( is_accepted( this, group) ) { |
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[97e3296] | 107 | // Some one was waiting for us, enter |
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| 108 | set_owner( this, thrd ); |
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[90c4df0] | 109 | |
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[daacf82] | 110 | // Reset mask |
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| 111 | reset_mask( this ); |
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| 112 | |
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[169d944] | 113 | __cfaabi_dbg_print_safe( "Kernel : mon accepts \n" ); |
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[97e3296] | 114 | } |
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[cb0e6de] | 115 | else { |
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[169d944] | 116 | __cfaabi_dbg_print_safe( "Kernel : blocking \n" ); |
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[90c4df0] | 117 | |
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[97e3296] | 118 | // Some one else has the monitor, wait in line for it |
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[8fc45b7] | 119 | append( this->entry_queue, thrd ); |
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[2e9aed4] | 120 | |
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[82ff5845] | 121 | BlockInternal( &this->lock ); |
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[cc7f4b1] | 122 | |
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[169d944] | 123 | __cfaabi_dbg_print_safe( "Kernel : %10p Entered mon %p\n", thrd, this); |
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[90c4df0] | 124 | |
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[97e3296] | 125 | // BlockInternal will unlock spinlock, no need to unlock ourselves |
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[2ac095d] | 126 | return; |
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[cb0e6de] | 127 | } |
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[f07e037] | 128 | |
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[169d944] | 129 | __cfaabi_dbg_print_safe( "Kernel : %10p Entered mon %p\n", thrd, this); |
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[90c4df0] | 130 | |
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[97e3296] | 131 | // Release the lock and leave |
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[ea7d2b0] | 132 | unlock( this->lock ); |
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[5ea06d6] | 133 | return; |
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[cb0e6de] | 134 | } |
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[f07e037] | 135 | |
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[549c006] | 136 | static void __enter_monitor_dtor( monitor_desc * this, fptr_t func ) { |
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[34c6c767] | 137 | // Lock the monitor spinlock |
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[2e9aed4] | 138 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[14a61b5] | 139 | // Interrupts disable inside critical section |
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| 140 | thread_desc * thrd = kernelTLS.this_thread; |
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[549c006] | 141 | |
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[169d944] | 142 | __cfaabi_dbg_print_safe( "Kernel : %10p Entering dtor for mon %p (%p)\n", thrd, this, this->owner); |
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[549c006] | 143 | |
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| 144 | |
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| 145 | if( !this->owner ) { |
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[169d944] | 146 | __cfaabi_dbg_print_safe( "Kernel : Destroying free mon %p\n", this); |
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[549c006] | 147 | |
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| 148 | // No one has the monitor, just take it |
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| 149 | set_owner( this, thrd ); |
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| 150 | |
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[ea7d2b0] | 151 | unlock( this->lock ); |
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[549c006] | 152 | return; |
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| 153 | } |
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| 154 | else if( this->owner == thrd) { |
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| 155 | // We already have the monitor... but where about to destroy it so the nesting will fail |
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| 156 | // Abort! |
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[2fdbb3b] | 157 | abort( "Attempt to destroy monitor %p by thread \"%.256s\" (%p) in nested mutex.", this, thrd->self_cor.name, thrd ); |
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[549c006] | 158 | } |
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| 159 | |
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[59a0bde] | 160 | __lock_size_t count = 1; |
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[549c006] | 161 | monitor_desc ** monitors = &this; |
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| 162 | __monitor_group_t group = { &this, 1, func }; |
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| 163 | if( is_accepted( this, group) ) { |
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[169d944] | 164 | __cfaabi_dbg_print_safe( "Kernel : mon accepts dtor, block and signal it \n" ); |
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[549c006] | 165 | |
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[b8116cd] | 166 | // Wake the thread that is waiting for this |
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[8fc45b7] | 167 | __condition_criterion_t * urgent = pop( this->signal_stack ); |
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[b8116cd] | 168 | verify( urgent ); |
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| 169 | |
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[549c006] | 170 | // Reset mask |
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| 171 | reset_mask( this ); |
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| 172 | |
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| 173 | // Create the node specific to this wait operation |
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[14a61b5] | 174 | wait_ctx_primed( thrd, 0 ) |
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[549c006] | 175 | |
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| 176 | // Some one else has the monitor, wait for him to finish and then run |
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[b8116cd] | 177 | BlockInternal( &this->lock, urgent->owner->waiting_thread ); |
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[549c006] | 178 | |
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| 179 | // Some one was waiting for us, enter |
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| 180 | set_owner( this, thrd ); |
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| 181 | } |
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| 182 | else { |
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[169d944] | 183 | __cfaabi_dbg_print_safe( "Kernel : blocking \n" ); |
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[549c006] | 184 | |
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[14a61b5] | 185 | wait_ctx( thrd, 0 ) |
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[549c006] | 186 | this->dtor_node = &waiter; |
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| 187 | |
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| 188 | // Some one else has the monitor, wait in line for it |
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[8fc45b7] | 189 | append( this->entry_queue, thrd ); |
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[549c006] | 190 | BlockInternal( &this->lock ); |
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| 191 | |
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| 192 | // BlockInternal will unlock spinlock, no need to unlock ourselves |
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| 193 | return; |
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| 194 | } |
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| 195 | |
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[169d944] | 196 | __cfaabi_dbg_print_safe( "Kernel : Destroying %p\n", this); |
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[549c006] | 197 | |
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| 198 | } |
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| 199 | |
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[97e3296] | 200 | // Leave single monitor |
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[1c273d0] | 201 | void __leave_monitor_desc( monitor_desc * this ) { |
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[2e9aed4] | 202 | // Lock the monitor spinlock |
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| 203 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[f07e037] | 204 | |
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[14a61b5] | 205 | __cfaabi_dbg_print_safe( "Kernel : %10p Leaving mon %p (%p)\n", kernelTLS.this_thread, this, this->owner); |
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[a843067] | 206 | |
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[14a61b5] | 207 | verifyf( kernelTLS.this_thread == this->owner, "Expected owner to be %p, got %p (r: %i, m: %p)", kernelTLS.this_thread, this->owner, this->recursion, this ); |
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[cc7f4b1] | 208 | |
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[97e3296] | 209 | // Leaving a recursion level, decrement the counter |
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[cb0e6de] | 210 | this->recursion -= 1; |
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[f07e037] | 211 | |
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[97e3296] | 212 | // If we haven't left the last level of recursion |
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| 213 | // it means we don't need to do anything |
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[690f13c] | 214 | if( this->recursion != 0) { |
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[169d944] | 215 | __cfaabi_dbg_print_safe( "Kernel : recursion still %d\n", this->recursion); |
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[ea7d2b0] | 216 | unlock( this->lock ); |
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[690f13c] | 217 | return; |
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| 218 | } |
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[f07e037] | 219 | |
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[97e3296] | 220 | // Get the next thread, will be null on low contention monitor |
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[0c78741] | 221 | thread_desc * new_owner = next_thread( this ); |
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[5ea06d6] | 222 | |
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[97e3296] | 223 | // We can now let other threads in safely |
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[ea7d2b0] | 224 | unlock( this->lock ); |
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[51f3798] | 225 | |
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[690f13c] | 226 | //We need to wake-up the thread |
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[1c273d0] | 227 | WakeThread( new_owner ); |
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| 228 | } |
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| 229 | |
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[549c006] | 230 | // Leave single monitor for the last time |
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| 231 | void __leave_dtor_monitor_desc( monitor_desc * this ) { |
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[36982fc] | 232 | __cfaabi_dbg_debug_do( |
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[b10affd] | 233 | if( TL_GET( this_thread ) != this->owner ) { |
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| 234 | abort( "Destroyed monitor %p has inconsistent owner, expected %p got %p.\n", this, TL_GET( this_thread ), this->owner); |
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[549c006] | 235 | } |
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| 236 | if( this->recursion != 1 ) { |
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[169d944] | 237 | abort( "Destroyed monitor %p has %d outstanding nested calls.\n", this, this->recursion - 1); |
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[549c006] | 238 | } |
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| 239 | ) |
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| 240 | } |
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| 241 | |
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[97e3296] | 242 | // Leave the thread monitor |
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| 243 | // last routine called by a thread. |
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| 244 | // Should never return |
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[09f357ec] | 245 | void __leave_thread_monitor() { |
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| 246 | thread_desc * thrd = TL_GET( this_thread ); |
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[b18830e] | 247 | monitor_desc * this = &thrd->self_mon; |
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[97e3296] | 248 | |
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| 249 | // Lock the monitor now |
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[2e9aed4] | 250 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[1c273d0] | 251 | |
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| 252 | disable_interrupts(); |
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| 253 | |
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[b18830e] | 254 | thrd->self_cor.state = Halted; |
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[1c273d0] | 255 | |
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[a843067] | 256 | verifyf( thrd == this->owner, "Expected owner to be %p, got %p (r: %i, m: %p)", thrd, this->owner, this->recursion, this ); |
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[1c273d0] | 257 | |
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[97e3296] | 258 | // Leaving a recursion level, decrement the counter |
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[1c273d0] | 259 | this->recursion -= 1; |
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| 260 | |
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[97e3296] | 261 | // If we haven't left the last level of recursion |
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| 262 | // it must mean there is an error |
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[169d944] | 263 | if( this->recursion != 0) { abort( "Thread internal monitor has unbalanced recursion" ); } |
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[1c273d0] | 264 | |
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[97e3296] | 265 | // Fetch the next thread, can be null |
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[1c273d0] | 266 | thread_desc * new_owner = next_thread( this ); |
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| 267 | |
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[97e3296] | 268 | // Leave the thread, this will unlock the spinlock |
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| 269 | // Use leave thread instead of BlockInternal which is |
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| 270 | // specialized for this case and supports null new_owner |
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[f2b12406] | 271 | LeaveThread( &this->lock, new_owner ); |
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[97e3296] | 272 | |
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| 273 | // Control flow should never reach here! |
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[cc7f4b1] | 274 | } |
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[2781e65] | 275 | } |
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| 276 | |
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[97e3296] | 277 | // Enter multiple monitor |
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| 278 | // relies on the monitor array being sorted |
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[6ae8c92] | 279 | static inline void enter( __monitor_group_t monitors ) { |
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[59a0bde] | 280 | for( __lock_size_t i = 0; i < monitors.size; i++) { |
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[0cf5b79] | 281 | __enter_monitor_desc( monitors[i], monitors ); |
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[97e3296] | 282 | } |
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[2781e65] | 283 | } |
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| 284 | |
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[97e3296] | 285 | // Leave multiple monitor |
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| 286 | // relies on the monitor array being sorted |
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[59a0bde] | 287 | static inline void leave(monitor_desc * monitors [], __lock_size_t count) { |
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| 288 | for( __lock_size_t i = count - 1; i >= 0; i--) { |
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[0c78741] | 289 | __leave_monitor_desc( monitors[i] ); |
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[2781e65] | 290 | } |
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[5ea06d6] | 291 | } |
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| 292 | |
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[97e3296] | 293 | // Ctor for monitor guard |
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| 294 | // Sorts monitors before entering |
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[59a0bde] | 295 | void ?{}( monitor_guard_t & this, monitor_desc * m [], __lock_size_t count, fptr_t func ) { |
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[14a61b5] | 296 | thread_desc * thrd = TL_GET( this_thread ); |
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| 297 | |
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[97e3296] | 298 | // Store current array |
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[242a902] | 299 | this.m = m; |
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| 300 | this.count = count; |
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[97e3296] | 301 | |
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[09800e9] | 302 | // Sort monitors based on address |
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[de737c8] | 303 | __libcfa_small_sort(this.m, count); |
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[5ea06d6] | 304 | |
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[97e3296] | 305 | // Save previous thread context |
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[14a61b5] | 306 | this.prev = thrd->monitors; |
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[5ea06d6] | 307 | |
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[97e3296] | 308 | // Update thread context (needed for conditions) |
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[14a61b5] | 309 | (thrd->monitors){m, count, func}; |
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[90c4df0] | 310 | |
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[169d944] | 311 | // __cfaabi_dbg_print_safe( "MGUARD : enter %d\n", count); |
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[a843067] | 312 | |
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[90c4df0] | 313 | // Enter the monitors in order |
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[6ae8c92] | 314 | __monitor_group_t group = {this.m, this.count, func}; |
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[b18830e] | 315 | enter( group ); |
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[a843067] | 316 | |
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[169d944] | 317 | // __cfaabi_dbg_print_safe( "MGUARD : entered\n" ); |
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[5ea06d6] | 318 | } |
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| 319 | |
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[6b224a52] | 320 | |
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[97e3296] | 321 | // Dtor for monitor guard |
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[242a902] | 322 | void ^?{}( monitor_guard_t & this ) { |
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[169d944] | 323 | // __cfaabi_dbg_print_safe( "MGUARD : leaving %d\n", this.count); |
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[a843067] | 324 | |
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[97e3296] | 325 | // Leave the monitors in order |
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[242a902] | 326 | leave( this.m, this.count ); |
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[5ea06d6] | 327 | |
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[169d944] | 328 | // __cfaabi_dbg_print_safe( "MGUARD : left\n" ); |
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[a843067] | 329 | |
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[97e3296] | 330 | // Restore thread context |
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[b10affd] | 331 | TL_GET( this_thread )->monitors = this.prev; |
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[5ea06d6] | 332 | } |
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| 333 | |
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[549c006] | 334 | // Ctor for monitor guard |
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| 335 | // Sorts monitors before entering |
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[8fc45b7] | 336 | void ?{}( monitor_dtor_guard_t & this, monitor_desc * m [], fptr_t func ) { |
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[14a61b5] | 337 | // optimization |
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| 338 | thread_desc * thrd = TL_GET( this_thread ); |
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| 339 | |
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[549c006] | 340 | // Store current array |
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| 341 | this.m = *m; |
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| 342 | |
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| 343 | // Save previous thread context |
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[14a61b5] | 344 | this.prev = thrd->monitors; |
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[549c006] | 345 | |
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| 346 | // Update thread context (needed for conditions) |
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[14a61b5] | 347 | (thrd->monitors){m, 1, func}; |
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[549c006] | 348 | |
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| 349 | __enter_monitor_dtor( this.m, func ); |
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| 350 | } |
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| 351 | |
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| 352 | // Dtor for monitor guard |
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| 353 | void ^?{}( monitor_dtor_guard_t & this ) { |
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| 354 | // Leave the monitors in order |
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| 355 | __leave_dtor_monitor_desc( this.m ); |
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| 356 | |
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| 357 | // Restore thread context |
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[b10affd] | 358 | TL_GET( this_thread )->monitors = this.prev; |
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[549c006] | 359 | } |
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| 360 | |
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[97e3296] | 361 | //----------------------------------------------------------------------------- |
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| 362 | // Internal scheduling types |
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[59a0bde] | 363 | void ?{}(__condition_node_t & this, thread_desc * waiting_thread, __lock_size_t count, uintptr_t user_info ) { |
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[242a902] | 364 | this.waiting_thread = waiting_thread; |
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| 365 | this.count = count; |
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[121be3e] | 366 | this.next = 0p; |
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[242a902] | 367 | this.user_info = user_info; |
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[be3d020] | 368 | } |
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| 369 | |
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[c40e7c5] | 370 | void ?{}(__condition_criterion_t & this ) with( this ) { |
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| 371 | ready = false; |
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[121be3e] | 372 | target = 0p; |
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| 373 | owner = 0p; |
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| 374 | next = 0p; |
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[be3d020] | 375 | } |
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| 376 | |
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[8fc45b7] | 377 | void ?{}(__condition_criterion_t & this, monitor_desc * target, __condition_node_t & owner ) { |
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[242a902] | 378 | this.ready = false; |
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| 379 | this.target = target; |
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[8fc45b7] | 380 | this.owner = &owner; |
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[121be3e] | 381 | this.next = 0p; |
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[ad1a8dd] | 382 | } |
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| 383 | |
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[5ea06d6] | 384 | //----------------------------------------------------------------------------- |
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| 385 | // Internal scheduling |
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[4cedd9f] | 386 | void wait( condition & this, uintptr_t user_info = 0 ) { |
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[0c78741] | 387 | brand_condition( this ); |
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[5ea06d6] | 388 | |
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[97e3296] | 389 | // Check that everything is as expected |
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[121be3e] | 390 | assertf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
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[2f6a7e93] | 391 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
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| 392 | verifyf( this.monitor_count < 32u, "Excessive monitor count (%"PRIiFAST16")", this.monitor_count ); |
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[5ea06d6] | 393 | |
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[97e3296] | 394 | // Create storage for monitor context |
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[4cedd9f] | 395 | monitor_ctx( this.monitors, this.monitor_count ); |
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[0c78741] | 396 | |
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[97e3296] | 397 | // Create the node specific to this wait operation |
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[b10affd] | 398 | wait_ctx( TL_GET( this_thread ), user_info ); |
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[0c78741] | 399 | |
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[97e3296] | 400 | // Append the current wait operation to the ones already queued on the condition |
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| 401 | // We don't need locks for that since conditions must always be waited on inside monitor mutual exclusion |
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[8fc45b7] | 402 | append( this.blocked, &waiter ); |
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[0c78741] | 403 | |
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[6ff4507] | 404 | // Lock all monitors (aggregates the locks as well) |
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[97e3296] | 405 | lock_all( monitors, locks, count ); |
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[5ea06d6] | 406 | |
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[97e3296] | 407 | // Find the next thread(s) to run |
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[59a0bde] | 408 | __lock_size_t thread_count = 0; |
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[0c78741] | 409 | thread_desc * threads[ count ]; |
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[66298de] | 410 | __builtin_memset( threads, 0, sizeof( threads ) ); |
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[ad1a8dd] | 411 | |
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[a843067] | 412 | // Save monitor states |
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| 413 | monitor_save; |
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| 414 | |
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[97e3296] | 415 | // Remove any duplicate threads |
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[59a0bde] | 416 | for( __lock_size_t i = 0; i < count; i++) { |
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[97e3296] | 417 | thread_desc * new_owner = next_thread( monitors[i] ); |
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[6ff4507] | 418 | insert_unique( threads, thread_count, new_owner ); |
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[5ea06d6] | 419 | } |
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| 420 | |
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[a843067] | 421 | // Everything is ready to go to sleep |
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| 422 | BlockInternal( locks, count, threads, thread_count ); |
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| 423 | |
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| 424 | // We are back, restore the owners and recursions |
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| 425 | monitor_restore; |
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[5ea06d6] | 426 | } |
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| 427 | |
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[4cedd9f] | 428 | bool signal( condition & this ) { |
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[97e3296] | 429 | if( is_empty( this ) ) { return false; } |
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[5ea06d6] | 430 | |
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| 431 | //Check that everything is as expected |
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[4cedd9f] | 432 | verify( this.monitors ); |
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| 433 | verify( this.monitor_count != 0 ); |
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[0c78741] | 434 | |
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[44264c5] | 435 | //Some more checking in debug |
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[36982fc] | 436 | __cfaabi_dbg_debug_do( |
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[b10affd] | 437 | thread_desc * this_thrd = TL_GET( this_thread ); |
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[4cedd9f] | 438 | if ( this.monitor_count != this_thrd->monitors.size ) { |
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[c2ca04d] | 439 | abort( "Signal on condition %p made with different number of monitor(s), expected %zi got %zi", &this, this.monitor_count, this_thrd->monitors.size ); |
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[97e3296] | 440 | } |
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[0c78741] | 441 | |
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[4cedd9f] | 442 | for(int i = 0; i < this.monitor_count; i++) { |
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[0cf5b79] | 443 | if ( this.monitors[i] != this_thrd->monitors[i] ) { |
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[2fdbb3b] | 444 | abort( "Signal on condition %p made with different monitor, expected %p got %p", &this, this.monitors[i], this_thrd->monitors[i] ); |
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[97e3296] | 445 | } |
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[0c78741] | 446 | } |
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[5ea06d6] | 447 | ); |
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| 448 | |
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[59a0bde] | 449 | __lock_size_t count = this.monitor_count; |
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[97e3296] | 450 | |
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| 451 | // Lock all monitors |
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[121be3e] | 452 | lock_all( this.monitors, 0p, count ); |
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[0c78741] | 453 | |
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[44264c5] | 454 | //Pop the head of the waiting queue |
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[8fc45b7] | 455 | __condition_node_t * node = pop_head( this.blocked ); |
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[44264c5] | 456 | |
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| 457 | //Add the thread to the proper AS stack |
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[0c78741] | 458 | for(int i = 0; i < count; i++) { |
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| 459 | __condition_criterion_t * crit = &node->criteria[i]; |
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| 460 | assert( !crit->ready ); |
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[8fc45b7] | 461 | push( crit->target->signal_stack, crit ); |
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[5ea06d6] | 462 | } |
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[0c78741] | 463 | |
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[44264c5] | 464 | //Release |
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[4cedd9f] | 465 | unlock_all( this.monitors, count ); |
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[be3d020] | 466 | |
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| 467 | return true; |
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[5ea06d6] | 468 | } |
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| 469 | |
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[4cedd9f] | 470 | bool signal_block( condition & this ) { |
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| 471 | if( !this.blocked.head ) { return false; } |
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[44264c5] | 472 | |
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| 473 | //Check that everything is as expected |
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[121be3e] | 474 | verifyf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
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[2f6a7e93] | 475 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
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[44264c5] | 476 | |
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[97e3296] | 477 | // Create storage for monitor context |
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[4cedd9f] | 478 | monitor_ctx( this.monitors, this.monitor_count ); |
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[44264c5] | 479 | |
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[97e3296] | 480 | // Lock all monitors (aggregates the locks them as well) |
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| 481 | lock_all( monitors, locks, count ); |
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[44264c5] | 482 | |
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[2e9aed4] | 483 | |
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[97e3296] | 484 | // Create the node specific to this wait operation |
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[afd550c] | 485 | wait_ctx_primed( kernelTLS.this_thread, 0 ) |
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[44264c5] | 486 | |
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| 487 | //save contexts |
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[6ff4507] | 488 | monitor_save; |
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[44264c5] | 489 | |
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| 490 | //Find the thread to run |
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[8fc45b7] | 491 | thread_desc * signallee = pop_head( this.blocked )->waiting_thread; |
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[6ff4507] | 492 | set_owner( monitors, count, signallee ); |
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[44264c5] | 493 | |
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[36982fc] | 494 | __cfaabi_dbg_print_buffer_decl( "Kernel : signal_block condition %p (s: %p)\n", &this, signallee ); |
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[de737c8] | 495 | |
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[44264c5] | 496 | //Everything is ready to go to sleep |
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[82ff5845] | 497 | BlockInternal( locks, count, &signallee, 1 ); |
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[44264c5] | 498 | |
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[c81ebf9] | 499 | |
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[97e3296] | 500 | // WE WOKE UP |
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[c81ebf9] | 501 | |
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| 502 | |
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[36982fc] | 503 | __cfaabi_dbg_print_buffer_local( "Kernel : signal_block returned\n" ); |
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[de737c8] | 504 | |
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[6ff4507] | 505 | //We are back, restore the masks and recursions |
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| 506 | monitor_restore; |
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[be3d020] | 507 | |
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| 508 | return true; |
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| 509 | } |
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| 510 | |
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[97e3296] | 511 | // Access the user_info of the thread waiting at the front of the queue |
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[4cedd9f] | 512 | uintptr_t front( condition & this ) { |
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[2ac095d] | 513 | verifyf( !is_empty(this), |
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[4aa2fb2] | 514 | "Attempt to access user data on an empty condition.\n" |
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| 515 | "Possible cause is not checking if the condition is empty before reading stored data." |
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[be3d020] | 516 | ); |
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[0cf5b79] | 517 | return ((typeof(this.blocked.head))this.blocked.head)->user_info; |
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[44264c5] | 518 | } |
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| 519 | |
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[c81ebf9] | 520 | //----------------------------------------------------------------------------- |
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[b18830e] | 521 | // External scheduling |
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| 522 | // cases to handle : |
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| 523 | // - target already there : |
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| 524 | // block and wake |
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| 525 | // - dtor already there |
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| 526 | // put thread on signaller stack |
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| 527 | // - non-blocking |
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| 528 | // return else |
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| 529 | // - timeout |
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| 530 | // return timeout |
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| 531 | // - block |
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| 532 | // setup mask |
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| 533 | // block |
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[6ae8c92] | 534 | void __waitfor_internal( const __waitfor_mask_t & mask, int duration ) { |
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[b18830e] | 535 | // This statment doesn't have a contiguous list of monitors... |
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| 536 | // Create one! |
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[59a0bde] | 537 | __lock_size_t max = count_max( mask ); |
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[b18830e] | 538 | monitor_desc * mon_storage[max]; |
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[66298de] | 539 | __builtin_memset( mon_storage, 0, sizeof( mon_storage ) ); |
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[59a0bde] | 540 | __lock_size_t actual_count = aggregate( mon_storage, mask ); |
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[97e3296] | 541 | |
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[523232d] | 542 | __cfaabi_dbg_print_buffer_decl( "Kernel : waitfor %"PRIdFAST16" (s: %"PRIdFAST16", m: %"PRIdFAST16")\n", actual_count, mask.size, (__lock_size_t)max); |
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[66298de] | 543 | |
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[daacf82] | 544 | if(actual_count == 0) return; |
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[19c43b7] | 545 | |
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[169d944] | 546 | __cfaabi_dbg_print_buffer_local( "Kernel : waitfor internal proceeding\n" ); |
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[4cc9b13] | 547 | |
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[97e3296] | 548 | // Create storage for monitor context |
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[b18830e] | 549 | monitor_ctx( mon_storage, actual_count ); |
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[c81ebf9] | 550 | |
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[6ff4507] | 551 | // Lock all monitors (aggregates the locks as well) |
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[97e3296] | 552 | lock_all( monitors, locks, count ); |
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[c81ebf9] | 553 | |
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[b18830e] | 554 | { |
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| 555 | // Check if the entry queue |
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[6ae8c92] | 556 | thread_desc * next; int index; |
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| 557 | [next, index] = search_entry_queue( mask, monitors, count ); |
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[b18830e] | 558 | |
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| 559 | if( next ) { |
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[19c43b7] | 560 | *mask.accepted = index; |
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[0cf5b79] | 561 | __acceptable_t& accepted = mask[index]; |
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| 562 | if( accepted.is_dtor ) { |
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[169d944] | 563 | __cfaabi_dbg_print_buffer_local( "Kernel : dtor already there\n" ); |
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[0cf5b79] | 564 | verifyf( accepted.size == 1, "ERROR: Accepted dtor has more than 1 mutex parameter." ); |
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[549c006] | 565 | |
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[0cf5b79] | 566 | monitor_desc * mon2dtor = accepted[0]; |
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[549c006] | 567 | verifyf( mon2dtor->dtor_node, "ERROR: Accepted monitor has no dtor_node." ); |
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| 568 | |
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| 569 | __condition_criterion_t * dtor_crit = mon2dtor->dtor_node->criteria; |
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[8fc45b7] | 570 | push( mon2dtor->signal_stack, dtor_crit ); |
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[549c006] | 571 | |
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| 572 | unlock_all( locks, count ); |
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[b18830e] | 573 | } |
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| 574 | else { |
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[169d944] | 575 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, baton-passing\n" ); |
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[19c43b7] | 576 | |
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| 577 | // Create the node specific to this wait operation |
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[14a61b5] | 578 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
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[19c43b7] | 579 | |
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| 580 | // Save monitor states |
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| 581 | monitor_save; |
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| 582 | |
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[523232d] | 583 | __cfaabi_dbg_print_buffer_local( "Kernel : baton of %"PRIdFAST16" monitors : ", count ); |
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[6a5be52] | 584 | #ifdef __CFA_DEBUG_PRINT__ |
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| 585 | for( int i = 0; i < count; i++) { |
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[36982fc] | 586 | __cfaabi_dbg_print_buffer_local( "%p %p ", monitors[i], monitors[i]->signal_stack.top ); |
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[6a5be52] | 587 | } |
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| 588 | #endif |
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[169d944] | 589 | __cfaabi_dbg_print_buffer_local( "\n" ); |
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[6a5be52] | 590 | |
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[19c43b7] | 591 | // Set the owners to be the next thread |
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| 592 | set_owner( monitors, count, next ); |
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| 593 | |
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| 594 | // Everything is ready to go to sleep |
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| 595 | BlockInternal( locks, count, &next, 1 ); |
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| 596 | |
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| 597 | // We are back, restore the owners and recursions |
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| 598 | monitor_restore; |
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| 599 | |
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[169d944] | 600 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, returned\n" ); |
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[b18830e] | 601 | } |
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| 602 | |
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[36982fc] | 603 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
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[19c43b7] | 604 | return; |
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[90c4df0] | 605 | } |
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| 606 | } |
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| 607 | |
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[c81ebf9] | 608 | |
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[4cc9b13] | 609 | if( duration == 0 ) { |
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[169d944] | 610 | __cfaabi_dbg_print_buffer_local( "Kernel : non-blocking, exiting\n" ); |
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[19c43b7] | 611 | |
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[4cc9b13] | 612 | unlock_all( locks, count ); |
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[19c43b7] | 613 | |
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[36982fc] | 614 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
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[4cc9b13] | 615 | return; |
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| 616 | } |
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[b18830e] | 617 | |
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| 618 | |
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[169d944] | 619 | verifyf( duration < 0, "Timeout on waitfor statments not supported yet." ); |
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[b18830e] | 620 | |
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[169d944] | 621 | __cfaabi_dbg_print_buffer_local( "Kernel : blocking waitfor\n" ); |
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[19c43b7] | 622 | |
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| 623 | // Create the node specific to this wait operation |
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[14a61b5] | 624 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
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[b18830e] | 625 | |
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[6ff4507] | 626 | monitor_save; |
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[6ae8c92] | 627 | set_mask( monitors, count, mask ); |
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[c81ebf9] | 628 | |
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[59a0bde] | 629 | for( __lock_size_t i = 0; i < count; i++) { |
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[14a61b5] | 630 | verify( monitors[i]->owner == kernelTLS.this_thread ); |
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[daacf82] | 631 | } |
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| 632 | |
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[19c43b7] | 633 | //Everything is ready to go to sleep |
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| 634 | BlockInternal( locks, count ); |
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| 635 | |
---|
| 636 | |
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| 637 | // WE WOKE UP |
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| 638 | |
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| 639 | |
---|
| 640 | //We are back, restore the masks and recursions |
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| 641 | monitor_restore; |
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| 642 | |
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[169d944] | 643 | __cfaabi_dbg_print_buffer_local( "Kernel : exiting\n" ); |
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[19c43b7] | 644 | |
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[36982fc] | 645 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
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[c81ebf9] | 646 | } |
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| 647 | |
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[0c78741] | 648 | //----------------------------------------------------------------------------- |
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| 649 | // Utilities |
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| 650 | |
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| 651 | static inline void set_owner( monitor_desc * this, thread_desc * owner ) { |
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[169d944] | 652 | // __cfaabi_dbg_print_safe( "Kernal : Setting owner of %p to %p ( was %p)\n", this, owner, this->owner ); |
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[a843067] | 653 | |
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[0c78741] | 654 | //Pass the monitor appropriately |
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| 655 | this->owner = owner; |
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| 656 | |
---|
| 657 | //We are passing the monitor to someone else, which means recursion level is not 0 |
---|
| 658 | this->recursion = owner ? 1 : 0; |
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| 659 | } |
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| 660 | |
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[513daec] | 661 | static inline void set_owner( monitor_desc * monitors [], __lock_size_t count, thread_desc * owner ) { |
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[6a5be52] | 662 | monitors[0]->owner = owner; |
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| 663 | monitors[0]->recursion = 1; |
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[513daec] | 664 | for( __lock_size_t i = 1; i < count; i++ ) { |
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[6a5be52] | 665 | monitors[i]->owner = owner; |
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| 666 | monitors[i]->recursion = 0; |
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[6ff4507] | 667 | } |
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| 668 | } |
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| 669 | |
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[513daec] | 670 | static inline void set_mask( monitor_desc * storage [], __lock_size_t count, const __waitfor_mask_t & mask ) { |
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| 671 | for( __lock_size_t i = 0; i < count; i++) { |
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[6ff4507] | 672 | storage[i]->mask = mask; |
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| 673 | } |
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| 674 | } |
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| 675 | |
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[daacf82] | 676 | static inline void reset_mask( monitor_desc * this ) { |
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[121be3e] | 677 | this->mask.accepted = 0p; |
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| 678 | this->mask.data = 0p; |
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[daacf82] | 679 | this->mask.size = 0; |
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| 680 | } |
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| 681 | |
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[0c78741] | 682 | static inline thread_desc * next_thread( monitor_desc * this ) { |
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| 683 | //Check the signaller stack |
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[169d944] | 684 | __cfaabi_dbg_print_safe( "Kernel : mon %p AS-stack top %p\n", this, this->signal_stack.top); |
---|
[8fc45b7] | 685 | __condition_criterion_t * urgent = pop( this->signal_stack ); |
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[0c78741] | 686 | if( urgent ) { |
---|
| 687 | //The signaller stack is not empty, |
---|
| 688 | //regardless of if we are ready to baton pass, |
---|
| 689 | //we need to set the monitor as in use |
---|
| 690 | set_owner( this, urgent->owner->waiting_thread ); |
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| 691 | |
---|
| 692 | return check_condition( urgent ); |
---|
| 693 | } |
---|
| 694 | |
---|
| 695 | // No signaller thread |
---|
| 696 | // Get the next thread in the entry_queue |
---|
[8fc45b7] | 697 | thread_desc * new_owner = pop_head( this->entry_queue ); |
---|
[0c78741] | 698 | set_owner( this, new_owner ); |
---|
| 699 | |
---|
| 700 | return new_owner; |
---|
| 701 | } |
---|
| 702 | |
---|
[6ff4507] | 703 | static inline bool is_accepted( monitor_desc * this, const __monitor_group_t & group ) { |
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[0cf5b79] | 704 | __acceptable_t * it = this->mask.data; // Optim |
---|
[59a0bde] | 705 | __lock_size_t count = this->mask.size; |
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[6ff4507] | 706 | |
---|
| 707 | // Check if there are any acceptable functions |
---|
[a843067] | 708 | if( !it ) return false; |
---|
[6ff4507] | 709 | |
---|
| 710 | // If this isn't the first monitor to test this, there is no reason to repeat the test. |
---|
| 711 | if( this != group[0] ) return group[0]->mask.accepted >= 0; |
---|
| 712 | |
---|
| 713 | // For all acceptable functions check if this is the current function. |
---|
[59a0bde] | 714 | for( __lock_size_t i = 0; i < count; i++, it++ ) { |
---|
[6ff4507] | 715 | if( *it == group ) { |
---|
| 716 | *this->mask.accepted = i; |
---|
| 717 | return true; |
---|
| 718 | } |
---|
| 719 | } |
---|
| 720 | |
---|
| 721 | // No function matched |
---|
| 722 | return false; |
---|
| 723 | } |
---|
| 724 | |
---|
[513daec] | 725 | static inline void init( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
| 726 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 727 | (criteria[i]){ monitors[i], waiter }; |
---|
[97e3296] | 728 | } |
---|
| 729 | |
---|
[8fc45b7] | 730 | waiter.criteria = criteria; |
---|
[97e3296] | 731 | } |
---|
| 732 | |
---|
[513daec] | 733 | static inline void init_push( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
| 734 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 735 | (criteria[i]){ monitors[i], waiter }; |
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[36982fc] | 736 | __cfaabi_dbg_print_safe( "Kernel : target %p = %p\n", criteria[i].target, &criteria[i] ); |
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[8fc45b7] | 737 | push( criteria[i].target->signal_stack, &criteria[i] ); |
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[97e3296] | 738 | } |
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| 739 | |
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[8fc45b7] | 740 | waiter.criteria = criteria; |
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[97e3296] | 741 | } |
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| 742 | |
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[ea7d2b0] | 743 | static inline void lock_all( __spinlock_t * locks [], __lock_size_t count ) { |
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[513daec] | 744 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[2e9aed4] | 745 | lock( *locks[i] __cfaabi_dbg_ctx2 ); |
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[0c78741] | 746 | } |
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| 747 | } |
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| 748 | |
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[ea7d2b0] | 749 | static inline void lock_all( monitor_desc * source [], __spinlock_t * /*out*/ locks [], __lock_size_t count ) { |
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[513daec] | 750 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 751 | __spinlock_t * l = &source[i]->lock; |
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[2e9aed4] | 752 | lock( *l __cfaabi_dbg_ctx2 ); |
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[0c78741] | 753 | if(locks) locks[i] = l; |
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| 754 | } |
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| 755 | } |
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| 756 | |
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[ea7d2b0] | 757 | static inline void unlock_all( __spinlock_t * locks [], __lock_size_t count ) { |
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[513daec] | 758 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 759 | unlock( *locks[i] ); |
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[0c78741] | 760 | } |
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| 761 | } |
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| 762 | |
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[513daec] | 763 | static inline void unlock_all( monitor_desc * locks [], __lock_size_t count ) { |
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| 764 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 765 | unlock( locks[i]->lock ); |
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[0c78741] | 766 | } |
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| 767 | } |
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| 768 | |
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[8fc45b7] | 769 | static inline void save( |
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| 770 | monitor_desc * ctx [], |
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[513daec] | 771 | __lock_size_t count, |
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[ea7d2b0] | 772 | __attribute((unused)) __spinlock_t * locks [], |
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[8fc45b7] | 773 | unsigned int /*out*/ recursions [], |
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| 774 | __waitfor_mask_t /*out*/ masks [] |
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| 775 | ) { |
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[513daec] | 776 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[0c78741] | 777 | recursions[i] = ctx[i]->recursion; |
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[6ff4507] | 778 | masks[i] = ctx[i]->mask; |
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[0c78741] | 779 | } |
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| 780 | } |
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| 781 | |
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[8fc45b7] | 782 | static inline void restore( |
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| 783 | monitor_desc * ctx [], |
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[513daec] | 784 | __lock_size_t count, |
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[ea7d2b0] | 785 | __spinlock_t * locks [], |
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[8fc45b7] | 786 | unsigned int /*out*/ recursions [], |
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| 787 | __waitfor_mask_t /*out*/ masks [] |
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| 788 | ) { |
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[6ff4507] | 789 | lock_all( locks, count ); |
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[513daec] | 790 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[0c78741] | 791 | ctx[i]->recursion = recursions[i]; |
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[6ff4507] | 792 | ctx[i]->mask = masks[i]; |
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[0c78741] | 793 | } |
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[6ff4507] | 794 | unlock_all( locks, count ); |
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[0c78741] | 795 | } |
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| 796 | |
---|
| 797 | // Function has 2 different behavior |
---|
| 798 | // 1 - Marks a monitors as being ready to run |
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| 799 | // 2 - Checks if all the monitors are ready to run |
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| 800 | // if so return the thread to run |
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| 801 | static inline thread_desc * check_condition( __condition_criterion_t * target ) { |
---|
| 802 | __condition_node_t * node = target->owner; |
---|
| 803 | unsigned short count = node->count; |
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| 804 | __condition_criterion_t * criteria = node->criteria; |
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| 805 | |
---|
| 806 | bool ready2run = true; |
---|
| 807 | |
---|
| 808 | for( int i = 0; i < count; i++ ) { |
---|
[44264c5] | 809 | |
---|
[36982fc] | 810 | // __cfaabi_dbg_print_safe( "Checking %p for %p\n", &criteria[i], target ); |
---|
[0c78741] | 811 | if( &criteria[i] == target ) { |
---|
| 812 | criteria[i].ready = true; |
---|
[36982fc] | 813 | // __cfaabi_dbg_print_safe( "True\n" ); |
---|
[0c78741] | 814 | } |
---|
| 815 | |
---|
| 816 | ready2run = criteria[i].ready && ready2run; |
---|
| 817 | } |
---|
| 818 | |
---|
[121be3e] | 819 | __cfaabi_dbg_print_safe( "Kernel : Runing %i (%p)\n", ready2run, ready2run ? node->waiting_thread : 0p ); |
---|
| 820 | return ready2run ? node->waiting_thread : 0p; |
---|
[0c78741] | 821 | } |
---|
| 822 | |
---|
[4cedd9f] | 823 | static inline void brand_condition( condition & this ) { |
---|
[b10affd] | 824 | thread_desc * thrd = TL_GET( this_thread ); |
---|
[4cedd9f] | 825 | if( !this.monitors ) { |
---|
[169d944] | 826 | // __cfaabi_dbg_print_safe( "Branding\n" ); |
---|
[121be3e] | 827 | assertf( thrd->monitors.data != 0p, "No current monitor to brand condition %p", thrd->monitors.data ); |
---|
[4cedd9f] | 828 | this.monitor_count = thrd->monitors.size; |
---|
[a933dcf4] | 829 | |
---|
[cdbfab0] | 830 | this.monitors = (monitor_desc **)malloc( this.monitor_count * sizeof( *this.monitors ) ); |
---|
[4cedd9f] | 831 | for( int i = 0; i < this.monitor_count; i++ ) { |
---|
[0cf5b79] | 832 | this.monitors[i] = thrd->monitors[i]; |
---|
[a933dcf4] | 833 | } |
---|
[0c78741] | 834 | } |
---|
| 835 | } |
---|
| 836 | |
---|
[59a0bde] | 837 | static inline [thread_desc *, int] search_entry_queue( const __waitfor_mask_t & mask, monitor_desc * monitors [], __lock_size_t count ) { |
---|
[90c4df0] | 838 | |
---|
[0cf5b79] | 839 | __queue_t(thread_desc) & entry_queue = monitors[0]->entry_queue; |
---|
[90c4df0] | 840 | |
---|
| 841 | // For each thread in the entry-queue |
---|
[8fc45b7] | 842 | for( thread_desc ** thrd_it = &entry_queue.head; |
---|
[90c4df0] | 843 | *thrd_it; |
---|
[4cc9b13] | 844 | thrd_it = &(*thrd_it)->next |
---|
| 845 | ) { |
---|
[90c4df0] | 846 | // For each acceptable check if it matches |
---|
[4cc9b13] | 847 | int i = 0; |
---|
[0cf5b79] | 848 | __acceptable_t * end = end (mask); |
---|
| 849 | __acceptable_t * begin = begin(mask); |
---|
| 850 | for( __acceptable_t * it = begin; it != end; it++, i++ ) { |
---|
[90c4df0] | 851 | // Check if we have a match |
---|
[aaa4f93] | 852 | if( *it == (*thrd_it)->monitors ) { |
---|
[90c4df0] | 853 | |
---|
| 854 | // If we have a match return it |
---|
| 855 | // after removeing it from the entry queue |
---|
[b18830e] | 856 | return [remove( entry_queue, thrd_it ), i]; |
---|
[90c4df0] | 857 | } |
---|
| 858 | } |
---|
| 859 | } |
---|
| 860 | |
---|
[b18830e] | 861 | return [0, -1]; |
---|
| 862 | } |
---|
| 863 | |
---|
[6ff4507] | 864 | forall(dtype T | sized( T )) |
---|
[59a0bde] | 865 | static inline __lock_size_t insert_unique( T * array [], __lock_size_t & size, T * val ) { |
---|
[6ff4507] | 866 | if( !val ) return size; |
---|
| 867 | |
---|
[59a0bde] | 868 | for( __lock_size_t i = 0; i <= size; i++) { |
---|
[6ff4507] | 869 | if( array[i] == val ) return size; |
---|
| 870 | } |
---|
| 871 | |
---|
| 872 | array[size] = val; |
---|
| 873 | size = size + 1; |
---|
| 874 | return size; |
---|
| 875 | } |
---|
| 876 | |
---|
[59a0bde] | 877 | static inline __lock_size_t count_max( const __waitfor_mask_t & mask ) { |
---|
| 878 | __lock_size_t max = 0; |
---|
| 879 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 880 | __acceptable_t & accepted = mask[i]; |
---|
| 881 | max += accepted.size; |
---|
[b18830e] | 882 | } |
---|
| 883 | return max; |
---|
[97e3296] | 884 | } |
---|
[b18830e] | 885 | |
---|
[59a0bde] | 886 | static inline __lock_size_t aggregate( monitor_desc * storage [], const __waitfor_mask_t & mask ) { |
---|
| 887 | __lock_size_t size = 0; |
---|
| 888 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 889 | __acceptable_t & accepted = mask[i]; |
---|
| 890 | __libcfa_small_sort( accepted.data, accepted.size ); |
---|
| 891 | for( __lock_size_t j = 0; j < accepted.size; j++) { |
---|
| 892 | insert_unique( storage, size, accepted[j] ); |
---|
[6ff4507] | 893 | } |
---|
[b18830e] | 894 | } |
---|
[6a5be52] | 895 | // TODO insertion sort instead of this |
---|
[de737c8] | 896 | __libcfa_small_sort( storage, size ); |
---|
[6ff4507] | 897 | return size; |
---|
[b18830e] | 898 | } |
---|
| 899 | |
---|
[6b0b624] | 900 | // Local Variables: // |
---|
| 901 | // mode: c // |
---|
| 902 | // tab-width: 4 // |
---|
| 903 | // End: // |
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