[09800e9] | 1 |
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| 2 | // -*- Mode: CFA -*-
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| 3 | //
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| 4 | // Cforall Version 1.0.0 Copyright (C) 2016 University of Waterloo
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| 5 | //
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| 6 | // The contents of this file are covered under the licence agreement in the
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| 7 | // file "LICENCE" distributed with Cforall.
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| 8 | //
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| 9 | // mutex.c --
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| 10 | //
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| 11 | // Author : Thierry Delisle
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| 12 | // Created On : Fri May 25 01:37:11 2018
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| 13 | // Last Modified By : Thierry Delisle
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| 14 | // Last Modified On : Fri May 25 01:37:51 2018
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| 15 | // Update Count : 0
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| 16 | //
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| 17 |
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[2026bb6] | 18 | #define __cforall_thread__
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| 19 |
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[58b6d1b] | 20 | #include "mutex.hfa"
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[09800e9] | 21 |
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[73abe95] | 22 | #include "kernel_private.hfa"
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[09800e9] | 23 |
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| 24 | //-----------------------------------------------------------------------------
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| 25 | // Locks
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| 26 |
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| 27 | // Exclusive lock - non-recursive
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| 28 | // ---
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| 29 | void ?{}(mutex_lock & this) {
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| 30 | this.lock{};
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| 31 | this.blocked_threads{};
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| 32 | }
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| 33 |
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| 34 | void ^?{}(mutex_lock & this) {
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| 35 | // default
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| 36 | }
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| 37 |
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| 38 | void lock(mutex_lock & this) with(this) {
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| 39 | lock( lock __cfaabi_dbg_ctx2 );
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| 40 | if( is_locked ) {
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| 41 | append( blocked_threads, kernelTLS.this_thread );
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| 42 | BlockInternal( &lock );
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| 43 | }
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| 44 | else {
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| 45 | is_locked = true;
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| 46 | unlock( lock );
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| 47 | }
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| 48 | }
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| 49 |
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| 50 | bool try_lock(mutex_lock & this) with(this) {
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| 51 | bool ret = false;
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| 52 | lock( lock __cfaabi_dbg_ctx2 );
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| 53 | if( !is_locked ) {
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| 54 | ret = true;
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| 55 | is_locked = true;
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| 56 | }
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| 57 | unlock( lock );
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| 58 | return ret;
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| 59 | }
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| 60 |
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| 61 | void unlock(mutex_lock & this) {
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| 62 | lock( this.lock __cfaabi_dbg_ctx2 );
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[6c7099a] | 63 | this.is_locked = (this.blocked_threads != 0);
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[09800e9] | 64 | WakeThread(
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| 65 | pop_head( this.blocked_threads )
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| 66 | );
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| 67 | unlock( this.lock );
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| 68 | }
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| 69 |
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| 70 | // Exclusive lock - non-recursive
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| 71 | // ---
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| 72 | void ?{}(recursive_mutex_lock & this) {
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| 73 | this.lock{};
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| 74 | this.blocked_threads{};
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| 75 | this.owner = NULL;
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| 76 | this.recursion_count = 0;
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| 77 | }
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| 78 |
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| 79 | void ^?{}(recursive_mutex_lock & this) {
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| 80 | // default
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| 81 | }
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| 82 |
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| 83 | void lock(recursive_mutex_lock & this) with(this) {
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| 84 | lock( lock __cfaabi_dbg_ctx2 );
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| 85 | if( owner == NULL ) {
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| 86 | owner = kernelTLS.this_thread;
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| 87 | recursion_count = 1;
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| 88 | unlock( lock );
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| 89 | }
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| 90 | else if( owner == kernelTLS.this_thread ) {
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| 91 | recursion_count++;
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| 92 | unlock( lock );
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| 93 | }
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| 94 | else {
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| 95 | append( blocked_threads, kernelTLS.this_thread );
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| 96 | BlockInternal( &lock );
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| 97 | }
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| 98 | }
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| 99 |
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| 100 | bool try_lock(recursive_mutex_lock & this) with(this) {
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| 101 | bool ret = false;
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| 102 | lock( lock __cfaabi_dbg_ctx2 );
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| 103 | if( owner == NULL ) {
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| 104 | owner = kernelTLS.this_thread;
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| 105 | recursion_count = 1;
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| 106 | ret = true;
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| 107 | }
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| 108 | else if( owner == kernelTLS.this_thread ) {
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| 109 | recursion_count++;
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| 110 | ret = true;
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| 111 | }
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| 112 | unlock( lock );
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| 113 | return ret;
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| 114 | }
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| 115 |
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| 116 | void unlock(recursive_mutex_lock & this) with(this) {
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| 117 | lock( lock __cfaabi_dbg_ctx2 );
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| 118 | recursion_count--;
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| 119 | if( recursion_count == 0 ) {
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| 120 | thread_desc * thrd = pop_head( blocked_threads );
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| 121 | owner = thrd;
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| 122 | recursion_count = (thrd ? 1 : 0);
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| 123 | WakeThread( thrd );
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| 124 | }
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| 125 | unlock( lock );
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| 126 | }
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| 127 |
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| 128 | //-----------------------------------------------------------------------------
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| 129 | // Conditions
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| 130 | void ?{}(condition_variable & this) {
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| 131 | this.blocked_threads{};
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| 132 | }
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| 133 |
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| 134 | void ^?{}(condition_variable & this) {
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| 135 | // default
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| 136 | }
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| 137 |
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| 138 | void notify_one(condition_variable & this) with(this) {
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| 139 | lock( lock __cfaabi_dbg_ctx2 );
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| 140 | WakeThread(
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| 141 | pop_head( this.blocked_threads )
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| 142 | );
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| 143 | unlock( lock );
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| 144 | }
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| 145 |
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| 146 | void notify_all(condition_variable & this) with(this) {
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| 147 | lock( lock __cfaabi_dbg_ctx2 );
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| 148 | while(this.blocked_threads) {
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| 149 | WakeThread(
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| 150 | pop_head( this.blocked_threads )
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| 151 | );
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| 152 | }
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| 153 | unlock( lock );
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| 154 | }
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| 155 |
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| 156 | void wait(condition_variable & this) {
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| 157 | lock( this.lock __cfaabi_dbg_ctx2 );
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| 158 | append( this.blocked_threads, kernelTLS.this_thread );
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| 159 | BlockInternal( &this.lock );
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| 160 | }
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| 161 |
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| 162 | forall(dtype L | is_lock(L))
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| 163 | void wait(condition_variable & this, L & l) {
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| 164 | lock( this.lock __cfaabi_dbg_ctx2 );
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| 165 | append( this.blocked_threads, kernelTLS.this_thread );
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| 166 | void __unlock(void) {
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| 167 | unlock(l);
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| 168 | unlock(this.lock);
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| 169 | }
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| 170 | BlockInternal( __unlock );
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[8cc7dd1] | 171 | lock(l);
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[09800e9] | 172 | }
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| 173 |
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| 174 | //-----------------------------------------------------------------------------
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| 175 | // Scopes
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| 176 | forall(dtype L | is_lock(L))
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| 177 | void lock_all ( L * locks[], size_t count) {
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| 178 | // Sort locks based on addresses
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| 179 | __libcfa_small_sort(locks, count);
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| 180 |
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| 181 | // Lock all
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| 182 | for(size_t i = 0; i < count; i++) {
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| 183 | L * l = locks[i];
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| 184 | lock( *l );
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| 185 | }
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| 186 | }
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| 187 |
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| 188 | forall(dtype L | is_lock(L))
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| 189 | void unlock_all( L * locks[], size_t count) {
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| 190 | // Lock all
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| 191 | for(size_t i = 0; i < count; i++) {
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| 192 | L * l = locks[i];
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| 193 | unlock( *l );
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| 194 | }
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| 195 | }
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