[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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[ac2b598] | 7 | // $monitor.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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[ac2b598] | 29 | static inline void __set_owner ( $monitor * this, $thread * owner ); |
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| 30 | static inline void __set_owner ( $monitor * storage [], __lock_size_t count, $thread * owner ); |
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| 31 | static inline void set_mask ( $monitor * storage [], __lock_size_t count, const __waitfor_mask_t & mask ); |
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| 32 | static inline void reset_mask( $monitor * this ); |
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[6ff4507] | 33 | |
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[ac2b598] | 34 | static inline $thread * next_thread( $monitor * this ); |
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| 35 | static inline bool is_accepted( $monitor * 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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[ac2b598] | 38 | static inline void lock_all ( $monitor * source [], __spinlock_t * /*out*/ locks [], __lock_size_t count ); |
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[ea7d2b0] | 39 | static inline void unlock_all( __spinlock_t * locks [], __lock_size_t count ); |
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[ac2b598] | 40 | static inline void unlock_all( $monitor * locks [], __lock_size_t count ); |
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[0c78741] | 41 | |
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[ac2b598] | 42 | static inline void save ( $monitor * 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 * 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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[ac2b598] | 45 | static inline void init ( __lock_size_t count, $monitor * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ); |
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| 46 | static inline void init_push( __lock_size_t count, $monitor * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ); |
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[97e3296] | 47 | |
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[ac2b598] | 48 | static inline $thread * check_condition ( __condition_criterion_t * ); |
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[4cedd9f] | 49 | static inline void brand_condition ( condition & ); |
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[ac2b598] | 50 | static inline [$thread *, int] search_entry_queue( const __waitfor_mask_t &, $monitor * 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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[ac2b598] | 55 | static inline __lock_size_t aggregate ( $monitor * 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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[ac2b598] | 70 | $monitor ** 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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[c7a900a] | 82 | // Enter single monitor |
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[ac2b598] | 83 | static void __enter( $monitor * this, const __monitor_group_t & group ) { |
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[c7a900a] | 84 | // Lock the monitor spinlock |
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| 85 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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| 86 | // Interrupts disable inside critical section |
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[ac2b598] | 87 | $thread * thrd = kernelTLS.this_thread; |
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[690f13c] | 88 | |
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[c7a900a] | 89 | __cfaabi_dbg_print_safe( "Kernel : %10p Entering mon %p (%p)\n", thrd, this, this->owner); |
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[690f13c] | 90 | |
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[c7a900a] | 91 | if( !this->owner ) { |
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| 92 | // No one has the monitor, just take it |
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| 93 | __set_owner( this, thrd ); |
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[90c4df0] | 94 | |
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[c7a900a] | 95 | __cfaabi_dbg_print_safe( "Kernel : mon is free \n" ); |
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| 96 | } |
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| 97 | else if( this->owner == thrd) { |
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| 98 | // We already have the monitor, just note how many times we took it |
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| 99 | this->recursion += 1; |
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[daacf82] | 100 | |
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[c7a900a] | 101 | __cfaabi_dbg_print_safe( "Kernel : mon already owned \n" ); |
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| 102 | } |
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| 103 | else if( is_accepted( this, group) ) { |
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| 104 | // Some one was waiting for us, enter |
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| 105 | __set_owner( this, thrd ); |
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[90c4df0] | 106 | |
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[c7a900a] | 107 | // Reset mask |
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| 108 | reset_mask( this ); |
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[2e9aed4] | 109 | |
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[c7a900a] | 110 | __cfaabi_dbg_print_safe( "Kernel : mon accepts \n" ); |
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| 111 | } |
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| 112 | else { |
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| 113 | __cfaabi_dbg_print_safe( "Kernel : blocking \n" ); |
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[cc7f4b1] | 114 | |
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[c7a900a] | 115 | // Some one else has the monitor, wait in line for it |
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| 116 | /* paranoid */ verify( thrd->next == 0p ); |
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| 117 | append( this->entry_queue, thrd ); |
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| 118 | /* paranoid */ verify( thrd->next == 1p ); |
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[90c4df0] | 119 | |
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[c7a900a] | 120 | unlock( this->lock ); |
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| 121 | park(); |
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[f07e037] | 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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[3381ed7] | 125 | /* paranoid */ 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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[5ea06d6] | 126 | return; |
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[cb0e6de] | 127 | } |
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[f07e037] | 128 | |
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[c7a900a] | 129 | __cfaabi_dbg_print_safe( "Kernel : %10p Entered mon %p\n", thrd, this); |
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[549c006] | 130 | |
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[c7a900a] | 131 | /* paranoid */ 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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| 132 | /* paranoid */ verify( this->lock.lock ); |
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[549c006] | 133 | |
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[c7a900a] | 134 | // Release the lock and leave |
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| 135 | unlock( this->lock ); |
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| 136 | return; |
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| 137 | } |
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[549c006] | 138 | |
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[ac2b598] | 139 | static void __dtor_enter( $monitor * this, fptr_t func ) { |
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[c7a900a] | 140 | // Lock the monitor spinlock |
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| 141 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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| 142 | // Interrupts disable inside critical section |
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[ac2b598] | 143 | $thread * thrd = kernelTLS.this_thread; |
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[549c006] | 144 | |
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[c7a900a] | 145 | __cfaabi_dbg_print_safe( "Kernel : %10p Entering dtor for mon %p (%p)\n", thrd, this, this->owner); |
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[3381ed7] | 146 | |
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[549c006] | 147 | |
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[c7a900a] | 148 | if( !this->owner ) { |
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| 149 | __cfaabi_dbg_print_safe( "Kernel : Destroying free mon %p\n", this); |
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[549c006] | 150 | |
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[c7a900a] | 151 | // No one has the monitor, just take it |
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| 152 | __set_owner( this, thrd ); |
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[549c006] | 153 | |
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[c7a900a] | 154 | 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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[b8116cd] | 155 | |
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[c7a900a] | 156 | unlock( this->lock ); |
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| 157 | return; |
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| 158 | } |
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| 159 | else if( this->owner == thrd) { |
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| 160 | // We already have the monitor... but where about to destroy it so the nesting will fail |
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| 161 | // Abort! |
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| 162 | abort( "Attempt to destroy monitor %p by thread \"%.256s\" (%p) in nested mutex.", this, thrd->self_cor.name, thrd ); |
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| 163 | } |
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[549c006] | 164 | |
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[c7a900a] | 165 | __lock_size_t count = 1; |
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[ac2b598] | 166 | $monitor ** monitors = &this; |
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[c7a900a] | 167 | __monitor_group_t group = { &this, 1, func }; |
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| 168 | if( is_accepted( this, group) ) { |
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| 169 | __cfaabi_dbg_print_safe( "Kernel : mon accepts dtor, block and signal it \n" ); |
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[549c006] | 170 | |
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[c7a900a] | 171 | // Wake the thread that is waiting for this |
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| 172 | __condition_criterion_t * urgent = pop( this->signal_stack ); |
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| 173 | /* paranoid */ verify( urgent ); |
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[3381ed7] | 174 | |
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[c7a900a] | 175 | // Reset mask |
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| 176 | reset_mask( this ); |
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[3381ed7] | 177 | |
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[c7a900a] | 178 | // Create the node specific to this wait operation |
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| 179 | wait_ctx_primed( thrd, 0 ) |
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[549c006] | 180 | |
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[c7a900a] | 181 | // Some one else has the monitor, wait for him to finish and then run |
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| 182 | unlock( this->lock ); |
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[549c006] | 183 | |
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[c7a900a] | 184 | // Release the next thread |
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| 185 | /* paranoid */ verifyf( urgent->owner->waiting_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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| 186 | unpark( urgent->owner->waiting_thread ); |
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[549c006] | 187 | |
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[c7a900a] | 188 | // Park current thread waiting |
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| 189 | park(); |
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[549c006] | 190 | |
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[c7a900a] | 191 | // Some one was waiting for us, enter |
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| 192 | /* paranoid */ 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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| 193 | } |
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| 194 | else { |
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| 195 | __cfaabi_dbg_print_safe( "Kernel : blocking \n" ); |
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[3381ed7] | 196 | |
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[c7a900a] | 197 | wait_ctx( thrd, 0 ) |
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| 198 | this->dtor_node = &waiter; |
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[549c006] | 199 | |
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[c7a900a] | 200 | // Some one else has the monitor, wait in line for it |
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| 201 | /* paranoid */ verify( thrd->next == 0p ); |
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| 202 | append( this->entry_queue, thrd ); |
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| 203 | /* paranoid */ verify( thrd->next == 1p ); |
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| 204 | unlock( this->lock ); |
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[549c006] | 205 | |
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[c7a900a] | 206 | // Park current thread waiting |
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| 207 | park(); |
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[549c006] | 208 | |
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[c7a900a] | 209 | /* paranoid */ 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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| 210 | return; |
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| 211 | } |
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[f07e037] | 212 | |
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[c7a900a] | 213 | __cfaabi_dbg_print_safe( "Kernel : Destroying %p\n", this); |
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[a843067] | 214 | |
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[c7a900a] | 215 | } |
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[cc7f4b1] | 216 | |
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[c7a900a] | 217 | // Leave single monitor |
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[ac2b598] | 218 | void __leave( $monitor * this ) { |
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[c7a900a] | 219 | // Lock the monitor spinlock |
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| 220 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[f07e037] | 221 | |
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[c7a900a] | 222 | __cfaabi_dbg_print_safe( "Kernel : %10p Leaving mon %p (%p)\n", kernelTLS.this_thread, this, this->owner); |
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[f07e037] | 223 | |
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[c7a900a] | 224 | /* paranoid */ 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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[3381ed7] | 225 | |
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[c7a900a] | 226 | // Leaving a recursion level, decrement the counter |
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| 227 | this->recursion -= 1; |
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[5ea06d6] | 228 | |
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[c7a900a] | 229 | // If we haven't left the last level of recursion |
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| 230 | // it means we don't need to do anything |
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| 231 | if( this->recursion != 0) { |
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| 232 | __cfaabi_dbg_print_safe( "Kernel : recursion still %d\n", this->recursion); |
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[ea7d2b0] | 233 | unlock( this->lock ); |
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[c7a900a] | 234 | return; |
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[1c273d0] | 235 | } |
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| 236 | |
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[c7a900a] | 237 | // Get the next thread, will be null on low contention monitor |
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[ac2b598] | 238 | $thread * new_owner = next_thread( this ); |
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[c7a900a] | 239 | |
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| 240 | // Check the new owner is consistent with who we wake-up |
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| 241 | // new_owner might be null even if someone owns the monitor when the owner is still waiting for another monitor |
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| 242 | /* paranoid */ verifyf( !new_owner || new_owner == this->owner, "Expected owner to be %p, got %p (m: %p)", new_owner, this->owner, this ); |
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| 243 | |
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| 244 | // We can now let other threads in safely |
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| 245 | unlock( this->lock ); |
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[549c006] | 246 | |
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[c7a900a] | 247 | //We need to wake-up the thread |
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| 248 | /* paranoid */ verifyf( !new_owner || new_owner == this->owner, "Expected owner to be %p, got %p (m: %p)", new_owner, this->owner, this ); |
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| 249 | unpark( new_owner ); |
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| 250 | } |
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| 251 | |
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| 252 | // Leave single monitor for the last time |
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[ac2b598] | 253 | void __dtor_leave( $monitor * this ) { |
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[c7a900a] | 254 | __cfaabi_dbg_debug_do( |
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| 255 | if( TL_GET( this_thread ) != this->owner ) { |
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| 256 | abort( "Destroyed monitor %p has inconsistent owner, expected %p got %p.\n", this, TL_GET( this_thread ), this->owner); |
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| 257 | } |
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| 258 | if( this->recursion != 1 ) { |
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| 259 | abort( "Destroyed monitor %p has %d outstanding nested calls.\n", this, this->recursion - 1); |
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| 260 | } |
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| 261 | ) |
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| 262 | } |
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| 263 | |
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| 264 | extern "C" { |
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[97e3296] | 265 | // Leave the thread monitor |
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| 266 | // last routine called by a thread. |
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| 267 | // Should never return |
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[c7a900a] | 268 | void __cfactx_thrd_leave() { |
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[ac2b598] | 269 | $thread * thrd = TL_GET( this_thread ); |
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| 270 | $monitor * this = &thrd->self_mon; |
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[97e3296] | 271 | |
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| 272 | // Lock the monitor now |
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[2e9aed4] | 273 | lock( this->lock __cfaabi_dbg_ctx2 ); |
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[1c273d0] | 274 | |
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| 275 | disable_interrupts(); |
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| 276 | |
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[b0c7419] | 277 | thrd->state = Halted; |
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[1c273d0] | 278 | |
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[3381ed7] | 279 | /* paranoid */ 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] | 280 | |
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[97e3296] | 281 | // Leaving a recursion level, decrement the counter |
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[1c273d0] | 282 | this->recursion -= 1; |
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| 283 | |
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[97e3296] | 284 | // If we haven't left the last level of recursion |
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| 285 | // it must mean there is an error |
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[169d944] | 286 | if( this->recursion != 0) { abort( "Thread internal monitor has unbalanced recursion" ); } |
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[1c273d0] | 287 | |
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[97e3296] | 288 | // Fetch the next thread, can be null |
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[ac2b598] | 289 | $thread * new_owner = next_thread( this ); |
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[3381ed7] | 290 | |
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| 291 | // Release the monitor lock |
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| 292 | unlock( this->lock ); |
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| 293 | |
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| 294 | // Unpark the next owner if needed |
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| 295 | /* paranoid */ verifyf( !new_owner || new_owner == this->owner, "Expected owner to be %p, got %p (m: %p)", new_owner, this->owner, this ); |
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[b0c7419] | 296 | /* paranoid */ verify( ! kernelTLS.preemption_state.enabled ); |
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| 297 | /* paranoid */ verify( ! kernelTLS.this_processor->destroyer ); |
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| 298 | /* paranoid */ verify( thrd->state == Halted ); |
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| 299 | |
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| 300 | kernelTLS.this_processor->destroyer = new_owner; |
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[1c273d0] | 301 | |
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[b0c7419] | 302 | // Leave the thread |
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| 303 | __leave_thread(); |
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[97e3296] | 304 | |
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| 305 | // Control flow should never reach here! |
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[cc7f4b1] | 306 | } |
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[2781e65] | 307 | } |
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| 308 | |
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[97e3296] | 309 | // Enter multiple monitor |
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| 310 | // relies on the monitor array being sorted |
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[6ae8c92] | 311 | static inline void enter( __monitor_group_t monitors ) { |
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[59a0bde] | 312 | for( __lock_size_t i = 0; i < monitors.size; i++) { |
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[c7a900a] | 313 | __enter( monitors[i], monitors ); |
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[97e3296] | 314 | } |
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[2781e65] | 315 | } |
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| 316 | |
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[97e3296] | 317 | // Leave multiple monitor |
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| 318 | // relies on the monitor array being sorted |
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[ac2b598] | 319 | static inline void leave($monitor * monitors [], __lock_size_t count) { |
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[59a0bde] | 320 | for( __lock_size_t i = count - 1; i >= 0; i--) { |
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[c7a900a] | 321 | __leave( monitors[i] ); |
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[2781e65] | 322 | } |
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[5ea06d6] | 323 | } |
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| 324 | |
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[97e3296] | 325 | // Ctor for monitor guard |
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| 326 | // Sorts monitors before entering |
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[ac2b598] | 327 | void ?{}( monitor_guard_t & this, $monitor * m [], __lock_size_t count, fptr_t func ) { |
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| 328 | $thread * thrd = TL_GET( this_thread ); |
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[14a61b5] | 329 | |
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[97e3296] | 330 | // Store current array |
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[242a902] | 331 | this.m = m; |
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| 332 | this.count = count; |
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[97e3296] | 333 | |
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[09800e9] | 334 | // Sort monitors based on address |
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[de737c8] | 335 | __libcfa_small_sort(this.m, count); |
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[5ea06d6] | 336 | |
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[97e3296] | 337 | // Save previous thread context |
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[14a61b5] | 338 | this.prev = thrd->monitors; |
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[5ea06d6] | 339 | |
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[97e3296] | 340 | // Update thread context (needed for conditions) |
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[14a61b5] | 341 | (thrd->monitors){m, count, func}; |
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[90c4df0] | 342 | |
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[169d944] | 343 | // __cfaabi_dbg_print_safe( "MGUARD : enter %d\n", count); |
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[a843067] | 344 | |
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[90c4df0] | 345 | // Enter the monitors in order |
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[6ae8c92] | 346 | __monitor_group_t group = {this.m, this.count, func}; |
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[b18830e] | 347 | enter( group ); |
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[a843067] | 348 | |
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[169d944] | 349 | // __cfaabi_dbg_print_safe( "MGUARD : entered\n" ); |
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[5ea06d6] | 350 | } |
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| 351 | |
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[6b224a52] | 352 | |
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[97e3296] | 353 | // Dtor for monitor guard |
---|
[242a902] | 354 | void ^?{}( monitor_guard_t & this ) { |
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[169d944] | 355 | // __cfaabi_dbg_print_safe( "MGUARD : leaving %d\n", this.count); |
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[a843067] | 356 | |
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[97e3296] | 357 | // Leave the monitors in order |
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[242a902] | 358 | leave( this.m, this.count ); |
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[5ea06d6] | 359 | |
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[169d944] | 360 | // __cfaabi_dbg_print_safe( "MGUARD : left\n" ); |
---|
[a843067] | 361 | |
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[97e3296] | 362 | // Restore thread context |
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[b10affd] | 363 | TL_GET( this_thread )->monitors = this.prev; |
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[5ea06d6] | 364 | } |
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| 365 | |
---|
[549c006] | 366 | // Ctor for monitor guard |
---|
| 367 | // Sorts monitors before entering |
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[ac2b598] | 368 | void ?{}( monitor_dtor_guard_t & this, $monitor * m [], fptr_t func ) { |
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[14a61b5] | 369 | // optimization |
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[ac2b598] | 370 | $thread * thrd = TL_GET( this_thread ); |
---|
[14a61b5] | 371 | |
---|
[549c006] | 372 | // Store current array |
---|
| 373 | this.m = *m; |
---|
| 374 | |
---|
| 375 | // Save previous thread context |
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[14a61b5] | 376 | this.prev = thrd->monitors; |
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[549c006] | 377 | |
---|
| 378 | // Update thread context (needed for conditions) |
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[14a61b5] | 379 | (thrd->monitors){m, 1, func}; |
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[549c006] | 380 | |
---|
[c7a900a] | 381 | __dtor_enter( this.m, func ); |
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[549c006] | 382 | } |
---|
| 383 | |
---|
| 384 | // Dtor for monitor guard |
---|
| 385 | void ^?{}( monitor_dtor_guard_t & this ) { |
---|
| 386 | // Leave the monitors in order |
---|
[c7a900a] | 387 | __dtor_leave( this.m ); |
---|
[549c006] | 388 | |
---|
| 389 | // Restore thread context |
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[b10affd] | 390 | TL_GET( this_thread )->monitors = this.prev; |
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[549c006] | 391 | } |
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| 392 | |
---|
[97e3296] | 393 | //----------------------------------------------------------------------------- |
---|
| 394 | // Internal scheduling types |
---|
[ac2b598] | 395 | void ?{}(__condition_node_t & this, $thread * waiting_thread, __lock_size_t count, uintptr_t user_info ) { |
---|
[242a902] | 396 | this.waiting_thread = waiting_thread; |
---|
| 397 | this.count = count; |
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[121be3e] | 398 | this.next = 0p; |
---|
[242a902] | 399 | this.user_info = user_info; |
---|
[be3d020] | 400 | } |
---|
| 401 | |
---|
[c40e7c5] | 402 | void ?{}(__condition_criterion_t & this ) with( this ) { |
---|
| 403 | ready = false; |
---|
[121be3e] | 404 | target = 0p; |
---|
| 405 | owner = 0p; |
---|
| 406 | next = 0p; |
---|
[be3d020] | 407 | } |
---|
| 408 | |
---|
[ac2b598] | 409 | void ?{}(__condition_criterion_t & this, $monitor * target, __condition_node_t & owner ) { |
---|
[242a902] | 410 | this.ready = false; |
---|
| 411 | this.target = target; |
---|
[8fc45b7] | 412 | this.owner = &owner; |
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[121be3e] | 413 | this.next = 0p; |
---|
[ad1a8dd] | 414 | } |
---|
| 415 | |
---|
[5ea06d6] | 416 | //----------------------------------------------------------------------------- |
---|
| 417 | // Internal scheduling |
---|
[4cedd9f] | 418 | void wait( condition & this, uintptr_t user_info = 0 ) { |
---|
[0c78741] | 419 | brand_condition( this ); |
---|
[5ea06d6] | 420 | |
---|
[97e3296] | 421 | // Check that everything is as expected |
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[121be3e] | 422 | assertf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
---|
[2f6a7e93] | 423 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
---|
| 424 | verifyf( this.monitor_count < 32u, "Excessive monitor count (%"PRIiFAST16")", this.monitor_count ); |
---|
[5ea06d6] | 425 | |
---|
[97e3296] | 426 | // Create storage for monitor context |
---|
[4cedd9f] | 427 | monitor_ctx( this.monitors, this.monitor_count ); |
---|
[0c78741] | 428 | |
---|
[97e3296] | 429 | // Create the node specific to this wait operation |
---|
[b10affd] | 430 | wait_ctx( TL_GET( this_thread ), user_info ); |
---|
[0c78741] | 431 | |
---|
[97e3296] | 432 | // Append the current wait operation to the ones already queued on the condition |
---|
| 433 | // We don't need locks for that since conditions must always be waited on inside monitor mutual exclusion |
---|
[3381ed7] | 434 | /* paranoid */ verify( waiter.next == 0p ); |
---|
[8fc45b7] | 435 | append( this.blocked, &waiter ); |
---|
[3381ed7] | 436 | /* paranoid */ verify( waiter.next == 1p ); |
---|
[0c78741] | 437 | |
---|
[6ff4507] | 438 | // Lock all monitors (aggregates the locks as well) |
---|
[97e3296] | 439 | lock_all( monitors, locks, count ); |
---|
[5ea06d6] | 440 | |
---|
[97e3296] | 441 | // Find the next thread(s) to run |
---|
[59a0bde] | 442 | __lock_size_t thread_count = 0; |
---|
[ac2b598] | 443 | $thread * threads[ count ]; |
---|
[66298de] | 444 | __builtin_memset( threads, 0, sizeof( threads ) ); |
---|
[ad1a8dd] | 445 | |
---|
[a843067] | 446 | // Save monitor states |
---|
| 447 | monitor_save; |
---|
| 448 | |
---|
[97e3296] | 449 | // Remove any duplicate threads |
---|
[59a0bde] | 450 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[ac2b598] | 451 | $thread * new_owner = next_thread( monitors[i] ); |
---|
[6ff4507] | 452 | insert_unique( threads, thread_count, new_owner ); |
---|
[5ea06d6] | 453 | } |
---|
| 454 | |
---|
[3381ed7] | 455 | // Unlock the locks, we don't need them anymore |
---|
| 456 | for(int i = 0; i < count; i++) { |
---|
| 457 | unlock( *locks[i] ); |
---|
| 458 | } |
---|
| 459 | |
---|
| 460 | // Wake the threads |
---|
| 461 | for(int i = 0; i < thread_count; i++) { |
---|
| 462 | unpark( threads[i] ); |
---|
| 463 | } |
---|
| 464 | |
---|
[a843067] | 465 | // Everything is ready to go to sleep |
---|
[3381ed7] | 466 | park(); |
---|
[a843067] | 467 | |
---|
| 468 | // We are back, restore the owners and recursions |
---|
| 469 | monitor_restore; |
---|
[5ea06d6] | 470 | } |
---|
| 471 | |
---|
[4cedd9f] | 472 | bool signal( condition & this ) { |
---|
[97e3296] | 473 | if( is_empty( this ) ) { return false; } |
---|
[5ea06d6] | 474 | |
---|
| 475 | //Check that everything is as expected |
---|
[4cedd9f] | 476 | verify( this.monitors ); |
---|
| 477 | verify( this.monitor_count != 0 ); |
---|
[0c78741] | 478 | |
---|
[44264c5] | 479 | //Some more checking in debug |
---|
[36982fc] | 480 | __cfaabi_dbg_debug_do( |
---|
[ac2b598] | 481 | $thread * this_thrd = TL_GET( this_thread ); |
---|
[4cedd9f] | 482 | if ( this.monitor_count != this_thrd->monitors.size ) { |
---|
[c2ca04d] | 483 | 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] | 484 | } |
---|
[0c78741] | 485 | |
---|
[4cedd9f] | 486 | for(int i = 0; i < this.monitor_count; i++) { |
---|
[0cf5b79] | 487 | if ( this.monitors[i] != this_thrd->monitors[i] ) { |
---|
[2fdbb3b] | 488 | abort( "Signal on condition %p made with different monitor, expected %p got %p", &this, this.monitors[i], this_thrd->monitors[i] ); |
---|
[97e3296] | 489 | } |
---|
[0c78741] | 490 | } |
---|
[5ea06d6] | 491 | ); |
---|
| 492 | |
---|
[59a0bde] | 493 | __lock_size_t count = this.monitor_count; |
---|
[97e3296] | 494 | |
---|
| 495 | // Lock all monitors |
---|
[121be3e] | 496 | lock_all( this.monitors, 0p, count ); |
---|
[0c78741] | 497 | |
---|
[44264c5] | 498 | //Pop the head of the waiting queue |
---|
[8fc45b7] | 499 | __condition_node_t * node = pop_head( this.blocked ); |
---|
[44264c5] | 500 | |
---|
| 501 | //Add the thread to the proper AS stack |
---|
[0c78741] | 502 | for(int i = 0; i < count; i++) { |
---|
| 503 | __condition_criterion_t * crit = &node->criteria[i]; |
---|
| 504 | assert( !crit->ready ); |
---|
[8fc45b7] | 505 | push( crit->target->signal_stack, crit ); |
---|
[5ea06d6] | 506 | } |
---|
[0c78741] | 507 | |
---|
[44264c5] | 508 | //Release |
---|
[4cedd9f] | 509 | unlock_all( this.monitors, count ); |
---|
[be3d020] | 510 | |
---|
| 511 | return true; |
---|
[5ea06d6] | 512 | } |
---|
| 513 | |
---|
[4cedd9f] | 514 | bool signal_block( condition & this ) { |
---|
| 515 | if( !this.blocked.head ) { return false; } |
---|
[44264c5] | 516 | |
---|
| 517 | //Check that everything is as expected |
---|
[121be3e] | 518 | verifyf( this.monitors != 0p, "Waiting with no monitors (%p)", this.monitors ); |
---|
[2f6a7e93] | 519 | verifyf( this.monitor_count != 0, "Waiting with 0 monitors (%"PRIiFAST16")", this.monitor_count ); |
---|
[44264c5] | 520 | |
---|
[97e3296] | 521 | // Create storage for monitor context |
---|
[4cedd9f] | 522 | monitor_ctx( this.monitors, this.monitor_count ); |
---|
[44264c5] | 523 | |
---|
[97e3296] | 524 | // Lock all monitors (aggregates the locks them as well) |
---|
| 525 | lock_all( monitors, locks, count ); |
---|
[44264c5] | 526 | |
---|
[2e9aed4] | 527 | |
---|
[97e3296] | 528 | // Create the node specific to this wait operation |
---|
[afd550c] | 529 | wait_ctx_primed( kernelTLS.this_thread, 0 ) |
---|
[44264c5] | 530 | |
---|
| 531 | //save contexts |
---|
[6ff4507] | 532 | monitor_save; |
---|
[44264c5] | 533 | |
---|
| 534 | //Find the thread to run |
---|
[ac2b598] | 535 | $thread * signallee = pop_head( this.blocked )->waiting_thread; |
---|
[3381ed7] | 536 | /* paranoid */ verify( signallee->next == 0p ); |
---|
[c7a900a] | 537 | __set_owner( monitors, count, signallee ); |
---|
[44264c5] | 538 | |
---|
[36982fc] | 539 | __cfaabi_dbg_print_buffer_decl( "Kernel : signal_block condition %p (s: %p)\n", &this, signallee ); |
---|
[de737c8] | 540 | |
---|
[3381ed7] | 541 | // unlock all the monitors |
---|
| 542 | unlock_all( locks, count ); |
---|
| 543 | |
---|
| 544 | // unpark the thread we signalled |
---|
| 545 | unpark( signallee ); |
---|
| 546 | |
---|
[44264c5] | 547 | //Everything is ready to go to sleep |
---|
[3381ed7] | 548 | park(); |
---|
[44264c5] | 549 | |
---|
[c81ebf9] | 550 | |
---|
[97e3296] | 551 | // WE WOKE UP |
---|
[c81ebf9] | 552 | |
---|
| 553 | |
---|
[36982fc] | 554 | __cfaabi_dbg_print_buffer_local( "Kernel : signal_block returned\n" ); |
---|
[de737c8] | 555 | |
---|
[6ff4507] | 556 | //We are back, restore the masks and recursions |
---|
| 557 | monitor_restore; |
---|
[be3d020] | 558 | |
---|
| 559 | return true; |
---|
| 560 | } |
---|
| 561 | |
---|
[97e3296] | 562 | // Access the user_info of the thread waiting at the front of the queue |
---|
[4cedd9f] | 563 | uintptr_t front( condition & this ) { |
---|
[2ac095d] | 564 | verifyf( !is_empty(this), |
---|
[4aa2fb2] | 565 | "Attempt to access user data on an empty condition.\n" |
---|
| 566 | "Possible cause is not checking if the condition is empty before reading stored data." |
---|
[be3d020] | 567 | ); |
---|
[0cf5b79] | 568 | return ((typeof(this.blocked.head))this.blocked.head)->user_info; |
---|
[44264c5] | 569 | } |
---|
| 570 | |
---|
[c81ebf9] | 571 | //----------------------------------------------------------------------------- |
---|
[b18830e] | 572 | // External scheduling |
---|
| 573 | // cases to handle : |
---|
| 574 | // - target already there : |
---|
| 575 | // block and wake |
---|
| 576 | // - dtor already there |
---|
| 577 | // put thread on signaller stack |
---|
| 578 | // - non-blocking |
---|
| 579 | // return else |
---|
| 580 | // - timeout |
---|
| 581 | // return timeout |
---|
| 582 | // - block |
---|
| 583 | // setup mask |
---|
| 584 | // block |
---|
[6ae8c92] | 585 | void __waitfor_internal( const __waitfor_mask_t & mask, int duration ) { |
---|
[b18830e] | 586 | // This statment doesn't have a contiguous list of monitors... |
---|
| 587 | // Create one! |
---|
[59a0bde] | 588 | __lock_size_t max = count_max( mask ); |
---|
[ac2b598] | 589 | $monitor * mon_storage[max]; |
---|
[66298de] | 590 | __builtin_memset( mon_storage, 0, sizeof( mon_storage ) ); |
---|
[59a0bde] | 591 | __lock_size_t actual_count = aggregate( mon_storage, mask ); |
---|
[97e3296] | 592 | |
---|
[523232d] | 593 | __cfaabi_dbg_print_buffer_decl( "Kernel : waitfor %"PRIdFAST16" (s: %"PRIdFAST16", m: %"PRIdFAST16")\n", actual_count, mask.size, (__lock_size_t)max); |
---|
[66298de] | 594 | |
---|
[daacf82] | 595 | if(actual_count == 0) return; |
---|
[19c43b7] | 596 | |
---|
[169d944] | 597 | __cfaabi_dbg_print_buffer_local( "Kernel : waitfor internal proceeding\n" ); |
---|
[4cc9b13] | 598 | |
---|
[97e3296] | 599 | // Create storage for monitor context |
---|
[b18830e] | 600 | monitor_ctx( mon_storage, actual_count ); |
---|
[c81ebf9] | 601 | |
---|
[6ff4507] | 602 | // Lock all monitors (aggregates the locks as well) |
---|
[97e3296] | 603 | lock_all( monitors, locks, count ); |
---|
[c81ebf9] | 604 | |
---|
[b18830e] | 605 | { |
---|
| 606 | // Check if the entry queue |
---|
[ac2b598] | 607 | $thread * next; int index; |
---|
[6ae8c92] | 608 | [next, index] = search_entry_queue( mask, monitors, count ); |
---|
[b18830e] | 609 | |
---|
| 610 | if( next ) { |
---|
[19c43b7] | 611 | *mask.accepted = index; |
---|
[0cf5b79] | 612 | __acceptable_t& accepted = mask[index]; |
---|
| 613 | if( accepted.is_dtor ) { |
---|
[169d944] | 614 | __cfaabi_dbg_print_buffer_local( "Kernel : dtor already there\n" ); |
---|
[0cf5b79] | 615 | verifyf( accepted.size == 1, "ERROR: Accepted dtor has more than 1 mutex parameter." ); |
---|
[549c006] | 616 | |
---|
[ac2b598] | 617 | $monitor * mon2dtor = accepted[0]; |
---|
[549c006] | 618 | verifyf( mon2dtor->dtor_node, "ERROR: Accepted monitor has no dtor_node." ); |
---|
| 619 | |
---|
| 620 | __condition_criterion_t * dtor_crit = mon2dtor->dtor_node->criteria; |
---|
[8fc45b7] | 621 | push( mon2dtor->signal_stack, dtor_crit ); |
---|
[549c006] | 622 | |
---|
| 623 | unlock_all( locks, count ); |
---|
[b18830e] | 624 | } |
---|
| 625 | else { |
---|
[169d944] | 626 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, baton-passing\n" ); |
---|
[19c43b7] | 627 | |
---|
| 628 | // Create the node specific to this wait operation |
---|
[14a61b5] | 629 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
---|
[19c43b7] | 630 | |
---|
| 631 | // Save monitor states |
---|
| 632 | monitor_save; |
---|
| 633 | |
---|
[523232d] | 634 | __cfaabi_dbg_print_buffer_local( "Kernel : baton of %"PRIdFAST16" monitors : ", count ); |
---|
[6a5be52] | 635 | #ifdef __CFA_DEBUG_PRINT__ |
---|
| 636 | for( int i = 0; i < count; i++) { |
---|
[36982fc] | 637 | __cfaabi_dbg_print_buffer_local( "%p %p ", monitors[i], monitors[i]->signal_stack.top ); |
---|
[6a5be52] | 638 | } |
---|
| 639 | #endif |
---|
[169d944] | 640 | __cfaabi_dbg_print_buffer_local( "\n" ); |
---|
[6a5be52] | 641 | |
---|
[19c43b7] | 642 | // Set the owners to be the next thread |
---|
[c7a900a] | 643 | __set_owner( monitors, count, next ); |
---|
[3381ed7] | 644 | |
---|
| 645 | // unlock all the monitors |
---|
| 646 | unlock_all( locks, count ); |
---|
[19c43b7] | 647 | |
---|
[3381ed7] | 648 | // unpark the thread we signalled |
---|
| 649 | unpark( next ); |
---|
| 650 | |
---|
| 651 | //Everything is ready to go to sleep |
---|
| 652 | park(); |
---|
[19c43b7] | 653 | |
---|
| 654 | // We are back, restore the owners and recursions |
---|
| 655 | monitor_restore; |
---|
| 656 | |
---|
[169d944] | 657 | __cfaabi_dbg_print_buffer_local( "Kernel : thread present, returned\n" ); |
---|
[b18830e] | 658 | } |
---|
| 659 | |
---|
[36982fc] | 660 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[19c43b7] | 661 | return; |
---|
[90c4df0] | 662 | } |
---|
| 663 | } |
---|
| 664 | |
---|
[c81ebf9] | 665 | |
---|
[4cc9b13] | 666 | if( duration == 0 ) { |
---|
[169d944] | 667 | __cfaabi_dbg_print_buffer_local( "Kernel : non-blocking, exiting\n" ); |
---|
[19c43b7] | 668 | |
---|
[4cc9b13] | 669 | unlock_all( locks, count ); |
---|
[19c43b7] | 670 | |
---|
[36982fc] | 671 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[4cc9b13] | 672 | return; |
---|
| 673 | } |
---|
[b18830e] | 674 | |
---|
| 675 | |
---|
[169d944] | 676 | verifyf( duration < 0, "Timeout on waitfor statments not supported yet." ); |
---|
[b18830e] | 677 | |
---|
[169d944] | 678 | __cfaabi_dbg_print_buffer_local( "Kernel : blocking waitfor\n" ); |
---|
[19c43b7] | 679 | |
---|
| 680 | // Create the node specific to this wait operation |
---|
[14a61b5] | 681 | wait_ctx_primed( kernelTLS.this_thread, 0 ); |
---|
[b18830e] | 682 | |
---|
[6ff4507] | 683 | monitor_save; |
---|
[6ae8c92] | 684 | set_mask( monitors, count, mask ); |
---|
[c81ebf9] | 685 | |
---|
[59a0bde] | 686 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[14a61b5] | 687 | verify( monitors[i]->owner == kernelTLS.this_thread ); |
---|
[daacf82] | 688 | } |
---|
| 689 | |
---|
[3381ed7] | 690 | // unlock all the monitors |
---|
| 691 | unlock_all( locks, count ); |
---|
| 692 | |
---|
[19c43b7] | 693 | //Everything is ready to go to sleep |
---|
[3381ed7] | 694 | park(); |
---|
[19c43b7] | 695 | |
---|
| 696 | |
---|
| 697 | // WE WOKE UP |
---|
| 698 | |
---|
| 699 | |
---|
| 700 | //We are back, restore the masks and recursions |
---|
| 701 | monitor_restore; |
---|
| 702 | |
---|
[169d944] | 703 | __cfaabi_dbg_print_buffer_local( "Kernel : exiting\n" ); |
---|
[19c43b7] | 704 | |
---|
[36982fc] | 705 | __cfaabi_dbg_print_buffer_local( "Kernel : accepted %d\n", *mask.accepted); |
---|
[c81ebf9] | 706 | } |
---|
| 707 | |
---|
[0c78741] | 708 | //----------------------------------------------------------------------------- |
---|
| 709 | // Utilities |
---|
| 710 | |
---|
[ac2b598] | 711 | static inline void __set_owner( $monitor * this, $thread * owner ) { |
---|
[3381ed7] | 712 | /* paranoid */ verify( this->lock.lock ); |
---|
[a843067] | 713 | |
---|
[0c78741] | 714 | //Pass the monitor appropriately |
---|
| 715 | this->owner = owner; |
---|
| 716 | |
---|
| 717 | //We are passing the monitor to someone else, which means recursion level is not 0 |
---|
| 718 | this->recursion = owner ? 1 : 0; |
---|
| 719 | } |
---|
| 720 | |
---|
[ac2b598] | 721 | static inline void __set_owner( $monitor * monitors [], __lock_size_t count, $thread * owner ) { |
---|
[3381ed7] | 722 | /* paranoid */ verify ( monitors[0]->lock.lock ); |
---|
| 723 | /* paranoid */ verifyf( monitors[0]->owner == kernelTLS.this_thread, "Expected owner to be %p, got %p (r: %i, m: %p)", kernelTLS.this_thread, monitors[0]->owner, monitors[0]->recursion, monitors[0] ); |
---|
| 724 | monitors[0]->owner = owner; |
---|
| 725 | monitors[0]->recursion = 1; |
---|
[513daec] | 726 | for( __lock_size_t i = 1; i < count; i++ ) { |
---|
[3381ed7] | 727 | /* paranoid */ verify ( monitors[i]->lock.lock ); |
---|
| 728 | /* paranoid */ verifyf( monitors[i]->owner == kernelTLS.this_thread, "Expected owner to be %p, got %p (r: %i, m: %p)", kernelTLS.this_thread, monitors[i]->owner, monitors[i]->recursion, monitors[i] ); |
---|
| 729 | monitors[i]->owner = owner; |
---|
| 730 | monitors[i]->recursion = 0; |
---|
[6ff4507] | 731 | } |
---|
| 732 | } |
---|
| 733 | |
---|
[ac2b598] | 734 | static inline void set_mask( $monitor * storage [], __lock_size_t count, const __waitfor_mask_t & mask ) { |
---|
[513daec] | 735 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6ff4507] | 736 | storage[i]->mask = mask; |
---|
| 737 | } |
---|
| 738 | } |
---|
| 739 | |
---|
[ac2b598] | 740 | static inline void reset_mask( $monitor * this ) { |
---|
[121be3e] | 741 | this->mask.accepted = 0p; |
---|
| 742 | this->mask.data = 0p; |
---|
[daacf82] | 743 | this->mask.size = 0; |
---|
| 744 | } |
---|
| 745 | |
---|
[ac2b598] | 746 | static inline $thread * next_thread( $monitor * this ) { |
---|
[0c78741] | 747 | //Check the signaller stack |
---|
[169d944] | 748 | __cfaabi_dbg_print_safe( "Kernel : mon %p AS-stack top %p\n", this, this->signal_stack.top); |
---|
[8fc45b7] | 749 | __condition_criterion_t * urgent = pop( this->signal_stack ); |
---|
[0c78741] | 750 | if( urgent ) { |
---|
| 751 | //The signaller stack is not empty, |
---|
| 752 | //regardless of if we are ready to baton pass, |
---|
| 753 | //we need to set the monitor as in use |
---|
[3381ed7] | 754 | /* paranoid */ verifyf( !this->owner || kernelTLS.this_thread == this->owner, "Expected owner to be %p, got %p (r: %i, m: %p)", kernelTLS.this_thread, this->owner, this->recursion, this ); |
---|
[c7a900a] | 755 | __set_owner( this, urgent->owner->waiting_thread ); |
---|
[0c78741] | 756 | |
---|
| 757 | return check_condition( urgent ); |
---|
| 758 | } |
---|
| 759 | |
---|
| 760 | // No signaller thread |
---|
| 761 | // Get the next thread in the entry_queue |
---|
[ac2b598] | 762 | $thread * new_owner = pop_head( this->entry_queue ); |
---|
[3381ed7] | 763 | /* paranoid */ verifyf( !this->owner || kernelTLS.this_thread == this->owner, "Expected owner to be %p, got %p (r: %i, m: %p)", kernelTLS.this_thread, this->owner, this->recursion, this ); |
---|
| 764 | /* paranoid */ verify( !new_owner || new_owner->next == 0p ); |
---|
[c7a900a] | 765 | __set_owner( this, new_owner ); |
---|
[0c78741] | 766 | |
---|
| 767 | return new_owner; |
---|
| 768 | } |
---|
| 769 | |
---|
[ac2b598] | 770 | static inline bool is_accepted( $monitor * this, const __monitor_group_t & group ) { |
---|
[0cf5b79] | 771 | __acceptable_t * it = this->mask.data; // Optim |
---|
[59a0bde] | 772 | __lock_size_t count = this->mask.size; |
---|
[6ff4507] | 773 | |
---|
| 774 | // Check if there are any acceptable functions |
---|
[a843067] | 775 | if( !it ) return false; |
---|
[6ff4507] | 776 | |
---|
| 777 | // If this isn't the first monitor to test this, there is no reason to repeat the test. |
---|
| 778 | if( this != group[0] ) return group[0]->mask.accepted >= 0; |
---|
| 779 | |
---|
| 780 | // For all acceptable functions check if this is the current function. |
---|
[59a0bde] | 781 | for( __lock_size_t i = 0; i < count; i++, it++ ) { |
---|
[6ff4507] | 782 | if( *it == group ) { |
---|
| 783 | *this->mask.accepted = i; |
---|
| 784 | return true; |
---|
| 785 | } |
---|
| 786 | } |
---|
| 787 | |
---|
| 788 | // No function matched |
---|
| 789 | return false; |
---|
| 790 | } |
---|
| 791 | |
---|
[ac2b598] | 792 | static inline void init( __lock_size_t count, $monitor * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
[513daec] | 793 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 794 | (criteria[i]){ monitors[i], waiter }; |
---|
[97e3296] | 795 | } |
---|
| 796 | |
---|
[8fc45b7] | 797 | waiter.criteria = criteria; |
---|
[97e3296] | 798 | } |
---|
| 799 | |
---|
[ac2b598] | 800 | static inline void init_push( __lock_size_t count, $monitor * monitors [], __condition_node_t & waiter, __condition_criterion_t criteria [] ) { |
---|
[513daec] | 801 | for( __lock_size_t i = 0; i < count; i++) { |
---|
[6b224a52] | 802 | (criteria[i]){ monitors[i], waiter }; |
---|
[36982fc] | 803 | __cfaabi_dbg_print_safe( "Kernel : target %p = %p\n", criteria[i].target, &criteria[i] ); |
---|
[8fc45b7] | 804 | push( criteria[i].target->signal_stack, &criteria[i] ); |
---|
[97e3296] | 805 | } |
---|
| 806 | |
---|
[8fc45b7] | 807 | waiter.criteria = criteria; |
---|
[97e3296] | 808 | } |
---|
| 809 | |
---|
[ea7d2b0] | 810 | static inline void lock_all( __spinlock_t * locks [], __lock_size_t count ) { |
---|
[513daec] | 811 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[2e9aed4] | 812 | lock( *locks[i] __cfaabi_dbg_ctx2 ); |
---|
[0c78741] | 813 | } |
---|
| 814 | } |
---|
| 815 | |
---|
[ac2b598] | 816 | static inline void lock_all( $monitor * source [], __spinlock_t * /*out*/ locks [], __lock_size_t count ) { |
---|
[513daec] | 817 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[ea7d2b0] | 818 | __spinlock_t * l = &source[i]->lock; |
---|
[2e9aed4] | 819 | lock( *l __cfaabi_dbg_ctx2 ); |
---|
[0c78741] | 820 | if(locks) locks[i] = l; |
---|
| 821 | } |
---|
| 822 | } |
---|
| 823 | |
---|
[ea7d2b0] | 824 | static inline void unlock_all( __spinlock_t * locks [], __lock_size_t count ) { |
---|
[513daec] | 825 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[ea7d2b0] | 826 | unlock( *locks[i] ); |
---|
[0c78741] | 827 | } |
---|
| 828 | } |
---|
| 829 | |
---|
[ac2b598] | 830 | static inline void unlock_all( $monitor * locks [], __lock_size_t count ) { |
---|
[513daec] | 831 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[ea7d2b0] | 832 | unlock( locks[i]->lock ); |
---|
[0c78741] | 833 | } |
---|
| 834 | } |
---|
| 835 | |
---|
[8fc45b7] | 836 | static inline void save( |
---|
[ac2b598] | 837 | $monitor * ctx [], |
---|
[513daec] | 838 | __lock_size_t count, |
---|
[ea7d2b0] | 839 | __attribute((unused)) __spinlock_t * locks [], |
---|
[8fc45b7] | 840 | unsigned int /*out*/ recursions [], |
---|
| 841 | __waitfor_mask_t /*out*/ masks [] |
---|
| 842 | ) { |
---|
[513daec] | 843 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[0c78741] | 844 | recursions[i] = ctx[i]->recursion; |
---|
[6ff4507] | 845 | masks[i] = ctx[i]->mask; |
---|
[0c78741] | 846 | } |
---|
| 847 | } |
---|
| 848 | |
---|
[8fc45b7] | 849 | static inline void restore( |
---|
[ac2b598] | 850 | $monitor * ctx [], |
---|
[513daec] | 851 | __lock_size_t count, |
---|
[ea7d2b0] | 852 | __spinlock_t * locks [], |
---|
[8fc45b7] | 853 | unsigned int /*out*/ recursions [], |
---|
| 854 | __waitfor_mask_t /*out*/ masks [] |
---|
| 855 | ) { |
---|
[6ff4507] | 856 | lock_all( locks, count ); |
---|
[513daec] | 857 | for( __lock_size_t i = 0; i < count; i++ ) { |
---|
[0c78741] | 858 | ctx[i]->recursion = recursions[i]; |
---|
[6ff4507] | 859 | ctx[i]->mask = masks[i]; |
---|
[0c78741] | 860 | } |
---|
[6ff4507] | 861 | unlock_all( locks, count ); |
---|
[0c78741] | 862 | } |
---|
| 863 | |
---|
| 864 | // Function has 2 different behavior |
---|
| 865 | // 1 - Marks a monitors as being ready to run |
---|
| 866 | // 2 - Checks if all the monitors are ready to run |
---|
| 867 | // if so return the thread to run |
---|
[ac2b598] | 868 | static inline $thread * check_condition( __condition_criterion_t * target ) { |
---|
[0c78741] | 869 | __condition_node_t * node = target->owner; |
---|
| 870 | unsigned short count = node->count; |
---|
| 871 | __condition_criterion_t * criteria = node->criteria; |
---|
| 872 | |
---|
| 873 | bool ready2run = true; |
---|
| 874 | |
---|
| 875 | for( int i = 0; i < count; i++ ) { |
---|
[44264c5] | 876 | |
---|
[36982fc] | 877 | // __cfaabi_dbg_print_safe( "Checking %p for %p\n", &criteria[i], target ); |
---|
[0c78741] | 878 | if( &criteria[i] == target ) { |
---|
| 879 | criteria[i].ready = true; |
---|
[36982fc] | 880 | // __cfaabi_dbg_print_safe( "True\n" ); |
---|
[0c78741] | 881 | } |
---|
| 882 | |
---|
| 883 | ready2run = criteria[i].ready && ready2run; |
---|
| 884 | } |
---|
| 885 | |
---|
[121be3e] | 886 | __cfaabi_dbg_print_safe( "Kernel : Runing %i (%p)\n", ready2run, ready2run ? node->waiting_thread : 0p ); |
---|
| 887 | return ready2run ? node->waiting_thread : 0p; |
---|
[0c78741] | 888 | } |
---|
| 889 | |
---|
[4cedd9f] | 890 | static inline void brand_condition( condition & this ) { |
---|
[ac2b598] | 891 | $thread * thrd = TL_GET( this_thread ); |
---|
[4cedd9f] | 892 | if( !this.monitors ) { |
---|
[169d944] | 893 | // __cfaabi_dbg_print_safe( "Branding\n" ); |
---|
[121be3e] | 894 | assertf( thrd->monitors.data != 0p, "No current monitor to brand condition %p", thrd->monitors.data ); |
---|
[4cedd9f] | 895 | this.monitor_count = thrd->monitors.size; |
---|
[a933dcf4] | 896 | |
---|
[ac2b598] | 897 | this.monitors = ($monitor **)malloc( this.monitor_count * sizeof( *this.monitors ) ); |
---|
[4cedd9f] | 898 | for( int i = 0; i < this.monitor_count; i++ ) { |
---|
[0cf5b79] | 899 | this.monitors[i] = thrd->monitors[i]; |
---|
[a933dcf4] | 900 | } |
---|
[0c78741] | 901 | } |
---|
| 902 | } |
---|
| 903 | |
---|
[ac2b598] | 904 | static inline [$thread *, int] search_entry_queue( const __waitfor_mask_t & mask, $monitor * monitors [], __lock_size_t count ) { |
---|
[90c4df0] | 905 | |
---|
[ac2b598] | 906 | __queue_t($thread) & entry_queue = monitors[0]->entry_queue; |
---|
[90c4df0] | 907 | |
---|
| 908 | // For each thread in the entry-queue |
---|
[ac2b598] | 909 | for( $thread ** thrd_it = &entry_queue.head; |
---|
[3381ed7] | 910 | *thrd_it != 1p; |
---|
[4cc9b13] | 911 | thrd_it = &(*thrd_it)->next |
---|
| 912 | ) { |
---|
[90c4df0] | 913 | // For each acceptable check if it matches |
---|
[4cc9b13] | 914 | int i = 0; |
---|
[0cf5b79] | 915 | __acceptable_t * end = end (mask); |
---|
| 916 | __acceptable_t * begin = begin(mask); |
---|
| 917 | for( __acceptable_t * it = begin; it != end; it++, i++ ) { |
---|
[90c4df0] | 918 | // Check if we have a match |
---|
[aaa4f93] | 919 | if( *it == (*thrd_it)->monitors ) { |
---|
[90c4df0] | 920 | |
---|
| 921 | // If we have a match return it |
---|
| 922 | // after removeing it from the entry queue |
---|
[b18830e] | 923 | return [remove( entry_queue, thrd_it ), i]; |
---|
[90c4df0] | 924 | } |
---|
| 925 | } |
---|
| 926 | } |
---|
| 927 | |
---|
[b18830e] | 928 | return [0, -1]; |
---|
| 929 | } |
---|
| 930 | |
---|
[6ff4507] | 931 | forall(dtype T | sized( T )) |
---|
[59a0bde] | 932 | static inline __lock_size_t insert_unique( T * array [], __lock_size_t & size, T * val ) { |
---|
[6ff4507] | 933 | if( !val ) return size; |
---|
| 934 | |
---|
[59a0bde] | 935 | for( __lock_size_t i = 0; i <= size; i++) { |
---|
[6ff4507] | 936 | if( array[i] == val ) return size; |
---|
| 937 | } |
---|
| 938 | |
---|
| 939 | array[size] = val; |
---|
| 940 | size = size + 1; |
---|
| 941 | return size; |
---|
| 942 | } |
---|
| 943 | |
---|
[59a0bde] | 944 | static inline __lock_size_t count_max( const __waitfor_mask_t & mask ) { |
---|
| 945 | __lock_size_t max = 0; |
---|
| 946 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 947 | __acceptable_t & accepted = mask[i]; |
---|
| 948 | max += accepted.size; |
---|
[b18830e] | 949 | } |
---|
| 950 | return max; |
---|
[97e3296] | 951 | } |
---|
[b18830e] | 952 | |
---|
[ac2b598] | 953 | static inline __lock_size_t aggregate( $monitor * storage [], const __waitfor_mask_t & mask ) { |
---|
[59a0bde] | 954 | __lock_size_t size = 0; |
---|
| 955 | for( __lock_size_t i = 0; i < mask.size; i++ ) { |
---|
[0cf5b79] | 956 | __acceptable_t & accepted = mask[i]; |
---|
| 957 | __libcfa_small_sort( accepted.data, accepted.size ); |
---|
| 958 | for( __lock_size_t j = 0; j < accepted.size; j++) { |
---|
| 959 | insert_unique( storage, size, accepted[j] ); |
---|
[6ff4507] | 960 | } |
---|
[b18830e] | 961 | } |
---|
[6a5be52] | 962 | // TODO insertion sort instead of this |
---|
[de737c8] | 963 | __libcfa_small_sort( storage, size ); |
---|
[6ff4507] | 964 | return size; |
---|
[b18830e] | 965 | } |
---|
| 966 | |
---|
[6b0b624] | 967 | // Local Variables: // |
---|
| 968 | // mode: c // |
---|
| 969 | // tab-width: 4 // |
---|
| 970 | // End: // |
---|