[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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[1c273d0] | 245 | void __leave_thread_monitor( thread_desc * thrd ) { |
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[b18830e] | 246 | monitor_desc * this = &thrd->self_mon; |
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[97e3296] | 247 | |
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| 248 | // Lock the monitor now |
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[2e9aed4] | 249 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[1c273d0] | 250 | |
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| 251 | disable_interrupts(); |
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| 252 | |
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[b18830e] | 253 | thrd->self_cor.state = Halted; |
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[1c273d0] | 254 | |
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[a843067] | 255 | 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] | 256 | |
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[97e3296] | 257 | // Leaving a recursion level, decrement the counter |
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[1c273d0] | 258 | this->recursion -= 1; |
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| 259 | |
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[97e3296] | 260 | // If we haven't left the last level of recursion |
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| 261 | // it must mean there is an error |
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[169d944] | 262 | if( this->recursion != 0) { abort( "Thread internal monitor has unbalanced recursion" ); } |
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[1c273d0] | 263 | |
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[97e3296] | 264 | // Fetch the next thread, can be null |
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[1c273d0] | 265 | thread_desc * new_owner = next_thread( this ); |
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| 266 | |
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[97e3296] | 267 | // Leave the thread, this will unlock the spinlock |
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| 268 | // Use leave thread instead of BlockInternal which is |
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| 269 | // specialized for this case and supports null new_owner |
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[f2b12406] | 270 | LeaveThread( &this->lock, new_owner ); |
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[97e3296] | 271 | |
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| 272 | // Control flow should never reach here! |
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[cc7f4b1] | 273 | } |
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[2781e65] | 274 | } |
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| 275 | |
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[97e3296] | 276 | // Enter multiple monitor |
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| 277 | // relies on the monitor array being sorted |
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[6ae8c92] | 278 | static inline void enter( __monitor_group_t monitors ) { |
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[59a0bde] | 279 | for( __lock_size_t i = 0; i < monitors.size; i++) { |
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[0cf5b79] | 280 | __enter_monitor_desc( monitors[i], monitors ); |
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[97e3296] | 281 | } |
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[2781e65] | 282 | } |
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| 283 | |
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[97e3296] | 284 | // Leave multiple monitor |
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| 285 | // relies on the monitor array being sorted |
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[59a0bde] | 286 | static inline void leave(monitor_desc * monitors [], __lock_size_t count) { |
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| 287 | for( __lock_size_t i = count - 1; i >= 0; i--) { |
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[0c78741] | 288 | __leave_monitor_desc( monitors[i] ); |
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[2781e65] | 289 | } |
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[5ea06d6] | 290 | } |
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| 291 | |
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[97e3296] | 292 | // Ctor for monitor guard |
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| 293 | // Sorts monitors before entering |
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[59a0bde] | 294 | void ?{}( monitor_guard_t & this, monitor_desc * m [], __lock_size_t count, fptr_t func ) { |
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[14a61b5] | 295 | thread_desc * thrd = TL_GET( this_thread ); |
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| 296 | |
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[97e3296] | 297 | // Store current array |
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[242a902] | 298 | this.m = m; |
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| 299 | this.count = count; |
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[97e3296] | 300 | |
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[09800e9] | 301 | // Sort monitors based on address |
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[de737c8] | 302 | __libcfa_small_sort(this.m, count); |
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[5ea06d6] | 303 | |
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[97e3296] | 304 | // Save previous thread context |
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[14a61b5] | 305 | this.prev = thrd->monitors; |
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[5ea06d6] | 306 | |
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[97e3296] | 307 | // Update thread context (needed for conditions) |
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[14a61b5] | 308 | (thrd->monitors){m, count, func}; |
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[90c4df0] | 309 | |
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[169d944] | 310 | // __cfaabi_dbg_print_safe( "MGUARD : enter %d\n", count); |
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[a843067] | 311 | |
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[90c4df0] | 312 | // Enter the monitors in order |
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[6ae8c92] | 313 | __monitor_group_t group = {this.m, this.count, func}; |
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[b18830e] | 314 | enter( group ); |
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[a843067] | 315 | |
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[169d944] | 316 | // __cfaabi_dbg_print_safe( "MGUARD : entered\n" ); |
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[5ea06d6] | 317 | } |
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| 318 | |
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[6b224a52] | 319 | |
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[97e3296] | 320 | // Dtor for monitor guard |
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[242a902] | 321 | void ^?{}( monitor_guard_t & this ) { |
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[169d944] | 322 | // __cfaabi_dbg_print_safe( "MGUARD : leaving %d\n", this.count); |
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[a843067] | 323 | |
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[97e3296] | 324 | // Leave the monitors in order |
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[242a902] | 325 | leave( this.m, this.count ); |
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[5ea06d6] | 326 | |
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[169d944] | 327 | // __cfaabi_dbg_print_safe( "MGUARD : left\n" ); |
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[a843067] | 328 | |
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[97e3296] | 329 | // Restore thread context |
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[b10affd] | 330 | TL_GET( this_thread )->monitors = this.prev; |
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[5ea06d6] | 331 | } |
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| 332 | |
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[549c006] | 333 | // Ctor for monitor guard |
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| 334 | // Sorts monitors before entering |
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[8fc45b7] | 335 | void ?{}( monitor_dtor_guard_t & this, monitor_desc * m [], fptr_t func ) { |
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[14a61b5] | 336 | // optimization |
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| 337 | thread_desc * thrd = TL_GET( this_thread ); |
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| 338 | |
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[549c006] | 339 | // Store current array |
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| 340 | this.m = *m; |
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| 341 | |
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| 342 | // Save previous thread context |
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[14a61b5] | 343 | this.prev = thrd->monitors; |
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[549c006] | 344 | |
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| 345 | // Update thread context (needed for conditions) |
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[14a61b5] | 346 | (thrd->monitors){m, 1, func}; |
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[549c006] | 347 | |
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| 348 | __enter_monitor_dtor( this.m, func ); |
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| 349 | } |
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| 350 | |
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| 351 | // Dtor for monitor guard |
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| 352 | void ^?{}( monitor_dtor_guard_t & this ) { |
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| 353 | // Leave the monitors in order |
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| 354 | __leave_dtor_monitor_desc( this.m ); |
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| 355 | |
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| 356 | // Restore thread context |
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[b10affd] | 357 | TL_GET( this_thread )->monitors = this.prev; |
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[549c006] | 358 | } |
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| 359 | |
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[97e3296] | 360 | //----------------------------------------------------------------------------- |
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| 361 | // Internal scheduling types |
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[59a0bde] | 362 | void ?{}(__condition_node_t & this, thread_desc * waiting_thread, __lock_size_t count, uintptr_t user_info ) { |
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[242a902] | 363 | this.waiting_thread = waiting_thread; |
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| 364 | this.count = count; |
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[121be3e] | 365 | this.next = 0p; |
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[242a902] | 366 | this.user_info = user_info; |
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[be3d020] | 367 | } |
---|
| 368 | |
---|
[c40e7c5] | 369 | void ?{}(__condition_criterion_t & this ) with( this ) { |
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| 370 | ready = false; |
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[121be3e] | 371 | target = 0p; |
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| 372 | owner = 0p; |
---|
| 373 | next = 0p; |
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[be3d020] | 374 | } |
---|
| 375 | |
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[8fc45b7] | 376 | void ?{}(__condition_criterion_t & this, monitor_desc * target, __condition_node_t & owner ) { |
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[242a902] | 377 | this.ready = false; |
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| 378 | this.target = target; |
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[8fc45b7] | 379 | this.owner = &owner; |
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[121be3e] | 380 | this.next = 0p; |
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[ad1a8dd] | 381 | } |
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| 382 | |
---|
[5ea06d6] | 383 | //----------------------------------------------------------------------------- |
---|
| 384 | // Internal scheduling |
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[4cedd9f] | 385 | void wait( condition & this, uintptr_t user_info = 0 ) { |
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[0c78741] | 386 | brand_condition( this ); |
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[5ea06d6] | 387 | |
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[97e3296] | 388 | // Check that everything is as expected |
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[121be3e] | 389 | assertf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
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[2f6a7e93] | 390 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
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| 391 | verifyf( this.monitor_count < 32u, "Excessive monitor count (%"PRIiFAST16")", this.monitor_count ); |
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[5ea06d6] | 392 | |
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[97e3296] | 393 | // Create storage for monitor context |
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[4cedd9f] | 394 | monitor_ctx( this.monitors, this.monitor_count ); |
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[0c78741] | 395 | |
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[97e3296] | 396 | // Create the node specific to this wait operation |
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[b10affd] | 397 | wait_ctx( TL_GET( this_thread ), user_info ); |
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[0c78741] | 398 | |
---|
[97e3296] | 399 | // Append the current wait operation to the ones already queued on the condition |
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| 400 | // We don't need locks for that since conditions must always be waited on inside monitor mutual exclusion |
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[8fc45b7] | 401 | append( this.blocked, &waiter ); |
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[0c78741] | 402 | |
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[6ff4507] | 403 | // Lock all monitors (aggregates the locks as well) |
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[97e3296] | 404 | lock_all( monitors, locks, count ); |
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[5ea06d6] | 405 | |
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[97e3296] | 406 | // Find the next thread(s) to run |
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[59a0bde] | 407 | __lock_size_t thread_count = 0; |
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[0c78741] | 408 | thread_desc * threads[ count ]; |
---|
[66298de] | 409 | __builtin_memset( threads, 0, sizeof( threads ) ); |
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[ad1a8dd] | 410 | |
---|
[a843067] | 411 | // Save monitor states |
---|
| 412 | monitor_save; |
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| 413 | |
---|
[97e3296] | 414 | // Remove any duplicate threads |
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[59a0bde] | 415 | for( __lock_size_t i = 0; i < count; i++) { |
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[97e3296] | 416 | thread_desc * new_owner = next_thread( monitors[i] ); |
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[6ff4507] | 417 | insert_unique( threads, thread_count, new_owner ); |
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[5ea06d6] | 418 | } |
---|
| 419 | |
---|
[a843067] | 420 | // Everything is ready to go to sleep |
---|
| 421 | BlockInternal( locks, count, threads, thread_count ); |
---|
| 422 | |
---|
| 423 | // We are back, restore the owners and recursions |
---|
| 424 | monitor_restore; |
---|
[5ea06d6] | 425 | } |
---|
| 426 | |
---|
[4cedd9f] | 427 | bool signal( condition & this ) { |
---|
[97e3296] | 428 | if( is_empty( this ) ) { return false; } |
---|
[5ea06d6] | 429 | |
---|
| 430 | //Check that everything is as expected |
---|
[4cedd9f] | 431 | verify( this.monitors ); |
---|
| 432 | verify( this.monitor_count != 0 ); |
---|
[0c78741] | 433 | |
---|
[44264c5] | 434 | //Some more checking in debug |
---|
[36982fc] | 435 | __cfaabi_dbg_debug_do( |
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[b10affd] | 436 | thread_desc * this_thrd = TL_GET( this_thread ); |
---|
[4cedd9f] | 437 | if ( this.monitor_count != this_thrd->monitors.size ) { |
---|
[c2ca04d] | 438 | abort( "Signal on condition %p made with different number of monitor(s), expected %zi got %zi", &this, this.monitor_count, this_thrd->monitors.size ); |
---|
[97e3296] | 439 | } |
---|
[0c78741] | 440 | |
---|
[4cedd9f] | 441 | for(int i = 0; i < this.monitor_count; i++) { |
---|
[0cf5b79] | 442 | if ( this.monitors[i] != this_thrd->monitors[i] ) { |
---|
[2fdbb3b] | 443 | abort( "Signal on condition %p made with different monitor, expected %p got %p", &this, this.monitors[i], this_thrd->monitors[i] ); |
---|
[97e3296] | 444 | } |
---|
[0c78741] | 445 | } |
---|
[5ea06d6] | 446 | ); |
---|
| 447 | |
---|
[59a0bde] | 448 | __lock_size_t count = this.monitor_count; |
---|
[97e3296] | 449 | |
---|
| 450 | // Lock all monitors |
---|
[121be3e] | 451 | lock_all( this.monitors, 0p, count ); |
---|
[0c78741] | 452 | |
---|
[44264c5] | 453 | //Pop the head of the waiting queue |
---|
[8fc45b7] | 454 | __condition_node_t * node = pop_head( this.blocked ); |
---|
[44264c5] | 455 | |
---|
| 456 | //Add the thread to the proper AS stack |
---|
[0c78741] | 457 | for(int i = 0; i < count; i++) { |
---|
| 458 | __condition_criterion_t * crit = &node->criteria[i]; |
---|
| 459 | assert( !crit->ready ); |
---|
[8fc45b7] | 460 | push( crit->target->signal_stack, crit ); |
---|
[5ea06d6] | 461 | } |
---|
[0c78741] | 462 | |
---|
[44264c5] | 463 | //Release |
---|
[4cedd9f] | 464 | unlock_all( this.monitors, count ); |
---|
[be3d020] | 465 | |
---|
| 466 | return true; |
---|
[5ea06d6] | 467 | } |
---|
| 468 | |
---|
[4cedd9f] | 469 | bool signal_block( condition & this ) { |
---|
| 470 | if( !this.blocked.head ) { return false; } |
---|
[44264c5] | 471 | |
---|
| 472 | //Check that everything is as expected |
---|
[121be3e] | 473 | verifyf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
---|
[2f6a7e93] | 474 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
---|
[44264c5] | 475 | |
---|
[97e3296] | 476 | // Create storage for monitor context |
---|
[4cedd9f] | 477 | monitor_ctx( this.monitors, this.monitor_count ); |
---|
[44264c5] | 478 | |
---|
[97e3296] | 479 | // Lock all monitors (aggregates the locks them as well) |
---|
| 480 | lock_all( monitors, locks, count ); |
---|
[44264c5] | 481 | |
---|
[2e9aed4] | 482 | |
---|
[97e3296] | 483 | // Create the node specific to this wait operation |
---|
[afd550c] | 484 | wait_ctx_primed( kernelTLS.this_thread, 0 ) |
---|
[44264c5] | 485 | |
---|
| 486 | //save contexts |
---|
[6ff4507] | 487 | monitor_save; |
---|
[44264c5] | 488 | |
---|
| 489 | //Find the thread to run |
---|
[8fc45b7] | 490 | thread_desc * signallee = pop_head( this.blocked )->waiting_thread; |
---|
[6ff4507] | 491 | set_owner( monitors, count, signallee ); |
---|
[44264c5] | 492 | |
---|
[36982fc] | 493 | __cfaabi_dbg_print_buffer_decl( "Kernel : signal_block condition %p (s: %p)\n", &this, signallee ); |
---|
[de737c8] | 494 | |
---|
[44264c5] | 495 | //Everything is ready to go to sleep |
---|
[82ff5845] | 496 | BlockInternal( locks, count, &signallee, 1 ); |
---|
[44264c5] | 497 | |
---|
[c81ebf9] | 498 | |
---|
[97e3296] | 499 | // WE WOKE UP |
---|
[c81ebf9] | 500 | |
---|
| 501 | |
---|
[36982fc] | 502 | __cfaabi_dbg_print_buffer_local( "Kernel : signal_block returned\n" ); |
---|
[de737c8] | 503 | |
---|
[6ff4507] | 504 | //We are back, restore the masks and recursions |
---|
| 505 | monitor_restore; |
---|
[be3d020] | 506 | |
---|
| 507 | return true; |
---|
| 508 | } |
---|
| 509 | |
---|
[97e3296] | 510 | // Access the user_info of the thread waiting at the front of the queue |
---|
[4cedd9f] | 511 | uintptr_t front( condition & this ) { |
---|
[2ac095d] | 512 | verifyf( !is_empty(this), |
---|
[4aa2fb2] | 513 | "Attempt to access user data on an empty condition.\n" |
---|
| 514 | "Possible cause is not checking if the condition is empty before reading stored data." |
---|
[be3d020] | 515 | ); |
---|
[0cf5b79] | 516 | return ((typeof(this.blocked.head))this.blocked.head)->user_info; |
---|
[44264c5] | 517 | } |
---|
| 518 | |
---|
[c81ebf9] | 519 | //----------------------------------------------------------------------------- |
---|
[b18830e] | 520 | // External scheduling |
---|
| 521 | // cases to handle : |
---|
| 522 | // - target already there : |
---|
| 523 | // block and wake |
---|
| 524 | // - dtor already there |
---|
| 525 | // put thread on signaller stack |
---|
| 526 | // - non-blocking |
---|
| 527 | // return else |
---|
| 528 | // - timeout |
---|
| 529 | // return timeout |
---|
| 530 | // - block |
---|
| 531 | // setup mask |
---|
| 532 | // block |
---|
[6ae8c92] | 533 | void __waitfor_internal( const __waitfor_mask_t & mask, int duration ) { |
---|
[b18830e] | 534 | // This statment doesn't have a contiguous list of monitors... |
---|
| 535 | // Create one! |
---|
[59a0bde] | 536 | __lock_size_t max = count_max( mask ); |
---|
[b18830e] | 537 | monitor_desc * mon_storage[max]; |
---|
[66298de] | 538 | __builtin_memset( mon_storage, 0, sizeof( mon_storage ) ); |
---|
[59a0bde] | 539 | __lock_size_t actual_count = aggregate( mon_storage, mask ); |
---|
[97e3296] | 540 | |
---|
[523232d] | 541 | __cfaabi_dbg_print_buffer_decl( "Kernel : waitfor %"PRIdFAST16" (s: %"PRIdFAST16", m: %"PRIdFAST16")\n", actual_count, mask.size, (__lock_size_t)max); |
---|
[66298de] | 542 | |
---|
[daacf82] | 543 | if(actual_count == 0) return; |
---|
[19c43b7] | 544 | |
---|
[169d944] | 545 | __cfaabi_dbg_print_buffer_local( "Kernel : waitfor internal proceeding\n" ); |
---|
[4cc9b13] | 546 | |
---|
[97e3296] | 547 | // Create storage for monitor context |
---|
[b18830e] | 548 | monitor_ctx( mon_storage, actual_count ); |
---|
[c81ebf9] | 549 | |
---|
[6ff4507] | 550 | // Lock all monitors (aggregates the locks as well) |
---|
[97e3296] | 551 | lock_all( monitors, locks, count ); |
---|
[c81ebf9] | 552 | |
---|
[b18830e] | 553 | { |
---|
| 554 | // Check if the entry queue |
---|
[6ae8c92] | 555 | thread_desc * next; int index; |
---|
| 556 | [next, index] = search_entry_queue( mask, monitors, count ); |
---|
[b18830e] | 557 | |
---|
| 558 | if( next ) { |
---|
[19c43b7] | 559 | *mask.accepted = index; |
---|
[0cf5b79] | 560 | __acceptable_t& accepted = mask[index]; |
---|
| 561 | if( accepted.is_dtor ) { |
---|
[169d944] | 562 | __cfaabi_dbg_print_buffer_local( "Kernel : dtor already there\n" ); |
---|
[0cf5b79] | 563 | verifyf( accepted.size == 1, "ERROR: Accepted dtor has more than 1 mutex parameter." ); |
---|
[549c006] | 564 | |
---|
[0cf5b79] | 565 | monitor_desc * mon2dtor = accepted[0]; |
---|
[549c006] | 566 | verifyf( mon2dtor->dtor_node, "ERROR: Accepted monitor has no dtor_node." ); |
---|
| 567 | |
---|
| 568 | __condition_criterion_t * dtor_crit = mon2dtor->dtor_node->criteria; |
---|
[8fc45b7] | 569 | push( mon2dtor->signal_stack, dtor_crit ); |
---|
[549c006] | 570 | |
---|
| 571 | unlock_all( locks, count ); |
---|
[b18830e] | 572 | } |
---|
| 573 | else { |
---|
[169d944] | 574 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, baton-passing\n" ); |
---|
[19c43b7] | 575 | |
---|
| 576 | // Create the node specific to this wait operation |
---|
[14a61b5] | 577 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
---|
[19c43b7] | 578 | |
---|
| 579 | // Save monitor states |
---|
| 580 | monitor_save; |
---|
| 581 | |
---|
[523232d] | 582 | __cfaabi_dbg_print_buffer_local( "Kernel : baton of %"PRIdFAST16" monitors : ", count ); |
---|
[6a5be52] | 583 | #ifdef __CFA_DEBUG_PRINT__ |
---|
| 584 | for( int i = 0; i < count; i++) { |
---|
[36982fc] | 585 | __cfaabi_dbg_print_buffer_local( "%p %p ", monitors[i], monitors[i]->signal_stack.top ); |
---|
[6a5be52] | 586 | } |
---|
| 587 | #endif |
---|
[169d944] | 588 | __cfaabi_dbg_print_buffer_local( "\n" ); |
---|
[6a5be52] | 589 | |
---|
[19c43b7] | 590 | // Set the owners to be the next thread |
---|
| 591 | set_owner( monitors, count, next ); |
---|
| 592 | |
---|
| 593 | // Everything is ready to go to sleep |
---|
| 594 | BlockInternal( locks, count, &next, 1 ); |
---|
| 595 | |
---|
| 596 | // We are back, restore the owners and recursions |
---|
| 597 | monitor_restore; |
---|
| 598 | |
---|
[169d944] | 599 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, returned\n" ); |
---|
[b18830e] | 600 | } |
---|
| 601 | |
---|
[36982fc] | 602 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[19c43b7] | 603 | return; |
---|
[90c4df0] | 604 | } |
---|
| 605 | } |
---|
| 606 | |
---|
[c81ebf9] | 607 | |
---|
[4cc9b13] | 608 | if( duration == 0 ) { |
---|
[169d944] | 609 | __cfaabi_dbg_print_buffer_local( "Kernel : non-blocking, exiting\n" ); |
---|
[19c43b7] | 610 | |
---|
[4cc9b13] | 611 | unlock_all( locks, count ); |
---|
[19c43b7] | 612 | |
---|
[36982fc] | 613 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[4cc9b13] | 614 | return; |
---|
| 615 | } |
---|
[b18830e] | 616 | |
---|
| 617 | |
---|
[169d944] | 618 | verifyf( duration < 0, "Timeout on waitfor statments not supported yet." ); |
---|
[b18830e] | 619 | |
---|
[169d944] | 620 | __cfaabi_dbg_print_buffer_local( "Kernel : blocking waitfor\n" ); |
---|
[19c43b7] | 621 | |
---|
| 622 | // Create the node specific to this wait operation |
---|
[14a61b5] | 623 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
---|
[b18830e] | 624 | |
---|
[6ff4507] | 625 | monitor_save; |
---|
[6ae8c92] | 626 | set_mask( monitors, count, mask ); |
---|
[c81ebf9] | 627 | |
---|
[59a0bde] | 628 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[14a61b5] | 629 | verify( monitors[i]->owner == kernelTLS.this_thread ); |
---|
[daacf82] | 630 | } |
---|
| 631 | |
---|
[19c43b7] | 632 | //Everything is ready to go to sleep |
---|
| 633 | BlockInternal( locks, count ); |
---|
| 634 | |
---|
| 635 | |
---|
| 636 | // WE WOKE UP |
---|
| 637 | |
---|
| 638 | |
---|
| 639 | //We are back, restore the masks and recursions |
---|
| 640 | monitor_restore; |
---|
| 641 | |
---|
[169d944] | 642 | __cfaabi_dbg_print_buffer_local( "Kernel : exiting\n" ); |
---|
[19c43b7] | 643 | |
---|
[36982fc] | 644 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[c81ebf9] | 645 | } |
---|
| 646 | |
---|
[0c78741] | 647 | //----------------------------------------------------------------------------- |
---|
| 648 | // Utilities |
---|
| 649 | |
---|
| 650 | static inline void set_owner( monitor_desc * this, thread_desc * owner ) { |
---|
[169d944] | 651 | // __cfaabi_dbg_print_safe( "Kernal : Setting owner of %p to %p ( was %p)\n", this, owner, this->owner ); |
---|
[a843067] | 652 | |
---|
[0c78741] | 653 | //Pass the monitor appropriately |
---|
| 654 | this->owner = owner; |
---|
| 655 | |
---|
| 656 | //We are passing the monitor to someone else, which means recursion level is not 0 |
---|
| 657 | this->recursion = owner ? 1 : 0; |
---|
| 658 | } |
---|
| 659 | |
---|
[513daec] | 660 | static inline void set_owner( monitor_desc * monitors [], __lock_size_t count, thread_desc * owner ) { |
---|
[6a5be52] | 661 | monitors[0]->owner = owner; |
---|
| 662 | monitors[0]->recursion = 1; |
---|
[513daec] | 663 | for( __lock_size_t i = 1; i < count; i++ ) { |
---|
[6a5be52] | 664 | monitors[i]->owner = owner; |
---|
| 665 | monitors[i]->recursion = 0; |
---|
[6ff4507] | 666 | } |
---|
| 667 | } |
---|
| 668 | |
---|
[513daec] | 669 | static inline void set_mask( monitor_desc * storage [], __lock_size_t count, const __waitfor_mask_t & mask ) { |
---|
| 670 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6ff4507] | 671 | storage[i]->mask = mask; |
---|
| 672 | } |
---|
| 673 | } |
---|
| 674 | |
---|
[daacf82] | 675 | static inline void reset_mask( monitor_desc * this ) { |
---|
[121be3e] | 676 | this->mask.accepted = 0p; |
---|
| 677 | this->mask.data = 0p; |
---|
[daacf82] | 678 | this->mask.size = 0; |
---|
| 679 | } |
---|
| 680 | |
---|
[0c78741] | 681 | static inline thread_desc * next_thread( monitor_desc * this ) { |
---|
| 682 | //Check the signaller stack |
---|
[169d944] | 683 | __cfaabi_dbg_print_safe( "Kernel : mon %p AS-stack top %p\n", this, this->signal_stack.top); |
---|
[8fc45b7] | 684 | __condition_criterion_t * urgent = pop( this->signal_stack ); |
---|
[0c78741] | 685 | if( urgent ) { |
---|
| 686 | //The signaller stack is not empty, |
---|
| 687 | //regardless of if we are ready to baton pass, |
---|
| 688 | //we need to set the monitor as in use |
---|
| 689 | set_owner( this, urgent->owner->waiting_thread ); |
---|
| 690 | |
---|
| 691 | return check_condition( urgent ); |
---|
| 692 | } |
---|
| 693 | |
---|
| 694 | // No signaller thread |
---|
| 695 | // Get the next thread in the entry_queue |
---|
[8fc45b7] | 696 | thread_desc * new_owner = pop_head( this->entry_queue ); |
---|
[0c78741] | 697 | set_owner( this, new_owner ); |
---|
| 698 | |
---|
| 699 | return new_owner; |
---|
| 700 | } |
---|
| 701 | |
---|
[6ff4507] | 702 | static inline bool is_accepted( monitor_desc * this, const __monitor_group_t & group ) { |
---|
[0cf5b79] | 703 | __acceptable_t * it = this->mask.data; // Optim |
---|
[59a0bde] | 704 | __lock_size_t count = this->mask.size; |
---|
[6ff4507] | 705 | |
---|
| 706 | // Check if there are any acceptable functions |
---|
[a843067] | 707 | if( !it ) return false; |
---|
[6ff4507] | 708 | |
---|
| 709 | // If this isn't the first monitor to test this, there is no reason to repeat the test. |
---|
| 710 | if( this != group[0] ) return group[0]->mask.accepted >= 0; |
---|
| 711 | |
---|
| 712 | // For all acceptable functions check if this is the current function. |
---|
[59a0bde] | 713 | for( __lock_size_t i = 0; i < count; i++, it++ ) { |
---|
[6ff4507] | 714 | if( *it == group ) { |
---|
| 715 | *this->mask.accepted = i; |
---|
| 716 | return true; |
---|
| 717 | } |
---|
| 718 | } |
---|
| 719 | |
---|
| 720 | // No function matched |
---|
| 721 | return false; |
---|
| 722 | } |
---|
| 723 | |
---|
[513daec] | 724 | static inline void init( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
| 725 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 726 | (criteria[i]){ monitors[i], waiter }; |
---|
[97e3296] | 727 | } |
---|
| 728 | |
---|
[8fc45b7] | 729 | waiter.criteria = criteria; |
---|
[97e3296] | 730 | } |
---|
| 731 | |
---|
[513daec] | 732 | static inline void init_push( __lock_size_t count, monitor_desc * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
| 733 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 734 | (criteria[i]){ monitors[i], waiter }; |
---|
[36982fc] | 735 | __cfaabi_dbg_print_safe( "Kernel : target %p = %p\n", criteria[i].target, &criteria[i] ); |
---|
[8fc45b7] | 736 | push( criteria[i].target->signal_stack, &criteria[i] ); |
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[97e3296] | 737 | } |
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| 738 | |
---|
[8fc45b7] | 739 | waiter.criteria = criteria; |
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[97e3296] | 740 | } |
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| 741 | |
---|
[ea7d2b0] | 742 | static inline void lock_all( __spinlock_t * locks [], __lock_size_t count ) { |
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[513daec] | 743 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[2e9aed4] | 744 | lock( *locks[i] __cfaabi_dbg_ctx2 ); |
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[0c78741] | 745 | } |
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| 746 | } |
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| 747 | |
---|
[ea7d2b0] | 748 | static inline void lock_all( monitor_desc * source [], __spinlock_t * /*out*/ locks [], __lock_size_t count ) { |
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[513daec] | 749 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 750 | __spinlock_t * l = &source[i]->lock; |
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[2e9aed4] | 751 | lock( *l __cfaabi_dbg_ctx2 ); |
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[0c78741] | 752 | if(locks) locks[i] = l; |
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| 753 | } |
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| 754 | } |
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| 755 | |
---|
[ea7d2b0] | 756 | static inline void unlock_all( __spinlock_t * locks [], __lock_size_t count ) { |
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[513daec] | 757 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 758 | unlock( *locks[i] ); |
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[0c78741] | 759 | } |
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| 760 | } |
---|
| 761 | |
---|
[513daec] | 762 | static inline void unlock_all( monitor_desc * locks [], __lock_size_t count ) { |
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| 763 | for( __lock_size_t i = 0; i < count; i++ ) { |
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[ea7d2b0] | 764 | unlock( locks[i]->lock ); |
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[0c78741] | 765 | } |
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| 766 | } |
---|
| 767 | |
---|
[8fc45b7] | 768 | static inline void save( |
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| 769 | monitor_desc * ctx [], |
---|
[513daec] | 770 | __lock_size_t count, |
---|
[ea7d2b0] | 771 | __attribute((unused)) __spinlock_t * locks [], |
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[8fc45b7] | 772 | unsigned int /*out*/ recursions [], |
---|
| 773 | __waitfor_mask_t /*out*/ masks [] |
---|
| 774 | ) { |
---|
[513daec] | 775 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[0c78741] | 776 | recursions[i] = ctx[i]->recursion; |
---|
[6ff4507] | 777 | masks[i] = ctx[i]->mask; |
---|
[0c78741] | 778 | } |
---|
| 779 | } |
---|
| 780 | |
---|
[8fc45b7] | 781 | static inline void restore( |
---|
| 782 | monitor_desc * ctx [], |
---|
[513daec] | 783 | __lock_size_t count, |
---|
[ea7d2b0] | 784 | __spinlock_t * locks [], |
---|
[8fc45b7] | 785 | unsigned int /*out*/ recursions [], |
---|
| 786 | __waitfor_mask_t /*out*/ masks [] |
---|
| 787 | ) { |
---|
[6ff4507] | 788 | lock_all( locks, count ); |
---|
[513daec] | 789 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[0c78741] | 790 | ctx[i]->recursion = recursions[i]; |
---|
[6ff4507] | 791 | ctx[i]->mask = masks[i]; |
---|
[0c78741] | 792 | } |
---|
[6ff4507] | 793 | unlock_all( locks, count ); |
---|
[0c78741] | 794 | } |
---|
| 795 | |
---|
| 796 | // Function has 2 different behavior |
---|
| 797 | // 1 - Marks a monitors as being ready to run |
---|
| 798 | // 2 - Checks if all the monitors are ready to run |
---|
| 799 | // if so return the thread to run |
---|
| 800 | static inline thread_desc * check_condition( __condition_criterion_t * target ) { |
---|
| 801 | __condition_node_t * node = target->owner; |
---|
| 802 | unsigned short count = node->count; |
---|
| 803 | __condition_criterion_t * criteria = node->criteria; |
---|
| 804 | |
---|
| 805 | bool ready2run = true; |
---|
| 806 | |
---|
| 807 | for( int i = 0; i < count; i++ ) { |
---|
[44264c5] | 808 | |
---|
[36982fc] | 809 | // __cfaabi_dbg_print_safe( "Checking %p for %p\n", &criteria[i], target ); |
---|
[0c78741] | 810 | if( &criteria[i] == target ) { |
---|
| 811 | criteria[i].ready = true; |
---|
[36982fc] | 812 | // __cfaabi_dbg_print_safe( "True\n" ); |
---|
[0c78741] | 813 | } |
---|
| 814 | |
---|
| 815 | ready2run = criteria[i].ready && ready2run; |
---|
| 816 | } |
---|
| 817 | |
---|
[121be3e] | 818 | __cfaabi_dbg_print_safe( "Kernel : Runing %i (%p)\n", ready2run, ready2run ? node->waiting_thread : 0p ); |
---|
| 819 | return ready2run ? node->waiting_thread : 0p; |
---|
[0c78741] | 820 | } |
---|
| 821 | |
---|
[4cedd9f] | 822 | static inline void brand_condition( condition & this ) { |
---|
[b10affd] | 823 | thread_desc * thrd = TL_GET( this_thread ); |
---|
[4cedd9f] | 824 | if( !this.monitors ) { |
---|
[169d944] | 825 | // __cfaabi_dbg_print_safe( "Branding\n" ); |
---|
[121be3e] | 826 | assertf( thrd->monitors.data != 0p, "No current monitor to brand condition %p", thrd->monitors.data ); |
---|
[4cedd9f] | 827 | this.monitor_count = thrd->monitors.size; |
---|
[a933dcf4] | 828 | |
---|
[cdbfab0] | 829 | this.monitors = (monitor_desc **)malloc( this.monitor_count * sizeof( *this.monitors ) ); |
---|
[4cedd9f] | 830 | for( int i = 0; i < this.monitor_count; i++ ) { |
---|
[0cf5b79] | 831 | this.monitors[i] = thrd->monitors[i]; |
---|
[a933dcf4] | 832 | } |
---|
[0c78741] | 833 | } |
---|
| 834 | } |
---|
| 835 | |
---|
[59a0bde] | 836 | static inline [thread_desc *, int] search_entry_queue( const __waitfor_mask_t & mask, monitor_desc * monitors [], __lock_size_t count ) { |
---|
[90c4df0] | 837 | |
---|
[0cf5b79] | 838 | __queue_t(thread_desc) & entry_queue = monitors[0]->entry_queue; |
---|
[90c4df0] | 839 | |
---|
| 840 | // For each thread in the entry-queue |
---|
[8fc45b7] | 841 | for( thread_desc ** thrd_it = &entry_queue.head; |
---|
[90c4df0] | 842 | *thrd_it; |
---|
[4cc9b13] | 843 | thrd_it = &(*thrd_it)->next |
---|
| 844 | ) { |
---|
[90c4df0] | 845 | // For each acceptable check if it matches |
---|
[4cc9b13] | 846 | int i = 0; |
---|
[0cf5b79] | 847 | __acceptable_t * end = end (mask); |
---|
| 848 | __acceptable_t * begin = begin(mask); |
---|
| 849 | for( __acceptable_t * it = begin; it != end; it++, i++ ) { |
---|
[90c4df0] | 850 | // Check if we have a match |
---|
[aaa4f93] | 851 | if( *it == (*thrd_it)->monitors ) { |
---|
[90c4df0] | 852 | |
---|
| 853 | // If we have a match return it |
---|
| 854 | // after removeing it from the entry queue |
---|
[b18830e] | 855 | return [remove( entry_queue, thrd_it ), i]; |
---|
[90c4df0] | 856 | } |
---|
| 857 | } |
---|
| 858 | } |
---|
| 859 | |
---|
[b18830e] | 860 | return [0, -1]; |
---|
| 861 | } |
---|
| 862 | |
---|
[6ff4507] | 863 | forall(dtype T | sized( T )) |
---|
[59a0bde] | 864 | static inline __lock_size_t insert_unique( T * array [], __lock_size_t & size, T * val ) { |
---|
[6ff4507] | 865 | if( !val ) return size; |
---|
| 866 | |
---|
[59a0bde] | 867 | for( __lock_size_t i = 0; i <= size; i++) { |
---|
[6ff4507] | 868 | if( array[i] == val ) return size; |
---|
| 869 | } |
---|
| 870 | |
---|
| 871 | array[size] = val; |
---|
| 872 | size = size + 1; |
---|
| 873 | return size; |
---|
| 874 | } |
---|
| 875 | |
---|
[59a0bde] | 876 | static inline __lock_size_t count_max( const __waitfor_mask_t & mask ) { |
---|
| 877 | __lock_size_t max = 0; |
---|
| 878 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 879 | __acceptable_t & accepted = mask[i]; |
---|
| 880 | max += accepted.size; |
---|
[b18830e] | 881 | } |
---|
| 882 | return max; |
---|
[97e3296] | 883 | } |
---|
[b18830e] | 884 | |
---|
[59a0bde] | 885 | static inline __lock_size_t aggregate( monitor_desc * storage [], const __waitfor_mask_t & mask ) { |
---|
| 886 | __lock_size_t size = 0; |
---|
| 887 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 888 | __acceptable_t & accepted = mask[i]; |
---|
| 889 | __libcfa_small_sort( accepted.data, accepted.size ); |
---|
| 890 | for( __lock_size_t j = 0; j < accepted.size; j++) { |
---|
| 891 | insert_unique( storage, size, accepted[j] ); |
---|
[6ff4507] | 892 | } |
---|
[b18830e] | 893 | } |
---|
[6a5be52] | 894 | // TODO insertion sort instead of this |
---|
[de737c8] | 895 | __libcfa_small_sort( storage, size ); |
---|
[6ff4507] | 896 | return size; |
---|
[b18830e] | 897 | } |
---|
| 898 | |
---|
[6b0b624] | 899 | // Local Variables: // |
---|
| 900 | // mode: c // |
---|
| 901 | // tab-width: 4 // |
---|
| 902 | // End: // |
---|