[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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[121be3e] | 13 | // Last Modified By : Peter A. Buhr
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| 14 | // Last Modified On : Wed Dec 4 09:16:39 2019
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| 15 | // Update Count : 1
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[09800e9] | 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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[519f11c] | 32 | this.is_locked = false;
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[09800e9] | 33 | }
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| 34 |
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| 35 | void ^?{}(mutex_lock & this) {
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| 36 | // default
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| 37 | }
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| 38 |
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| 39 | void lock(mutex_lock & this) with(this) {
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| 40 | lock( lock __cfaabi_dbg_ctx2 );
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| 41 | if( is_locked ) {
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| 42 | append( blocked_threads, kernelTLS.this_thread );
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[3381ed7] | 43 | unlock( lock );
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[ae66348] | 44 | park( __cfaabi_dbg_ctx );
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[09800e9] | 45 | }
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| 46 | else {
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| 47 | is_locked = true;
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| 48 | unlock( lock );
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| 49 | }
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| 50 | }
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| 51 |
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| 52 | bool try_lock(mutex_lock & this) with(this) {
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| 53 | bool ret = false;
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| 54 | lock( lock __cfaabi_dbg_ctx2 );
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| 55 | if( !is_locked ) {
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| 56 | ret = true;
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| 57 | is_locked = true;
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| 58 | }
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| 59 | unlock( lock );
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| 60 | return ret;
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| 61 | }
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| 62 |
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| 63 | void unlock(mutex_lock & this) {
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| 64 | lock( this.lock __cfaabi_dbg_ctx2 );
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[6c7099a] | 65 | this.is_locked = (this.blocked_threads != 0);
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[3381ed7] | 66 | unpark(
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[ae66348] | 67 | pop_head( this.blocked_threads ) __cfaabi_dbg_ctx2
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[09800e9] | 68 | );
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| 69 | unlock( this.lock );
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| 70 | }
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| 71 |
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| 72 | // Exclusive lock - non-recursive
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| 73 | // ---
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| 74 | void ?{}(recursive_mutex_lock & this) {
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| 75 | this.lock{};
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| 76 | this.blocked_threads{};
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[121be3e] | 77 | this.owner = 0p;
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[09800e9] | 78 | this.recursion_count = 0;
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| 79 | }
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| 80 |
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| 81 | void ^?{}(recursive_mutex_lock & this) {
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| 82 | // default
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| 83 | }
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| 84 |
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| 85 | void lock(recursive_mutex_lock & this) with(this) {
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| 86 | lock( lock __cfaabi_dbg_ctx2 );
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[121be3e] | 87 | if( owner == 0p ) {
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[09800e9] | 88 | owner = kernelTLS.this_thread;
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| 89 | recursion_count = 1;
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| 90 | unlock( lock );
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| 91 | }
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| 92 | else if( owner == kernelTLS.this_thread ) {
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| 93 | recursion_count++;
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| 94 | unlock( lock );
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| 95 | }
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| 96 | else {
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| 97 | append( blocked_threads, kernelTLS.this_thread );
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[3381ed7] | 98 | unlock( lock );
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[ae66348] | 99 | park( __cfaabi_dbg_ctx );
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[09800e9] | 100 | }
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| 101 | }
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| 102 |
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| 103 | bool try_lock(recursive_mutex_lock & this) with(this) {
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| 104 | bool ret = false;
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| 105 | lock( lock __cfaabi_dbg_ctx2 );
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[121be3e] | 106 | if( owner == 0p ) {
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[09800e9] | 107 | owner = kernelTLS.this_thread;
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| 108 | recursion_count = 1;
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| 109 | ret = true;
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| 110 | }
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| 111 | else if( owner == kernelTLS.this_thread ) {
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| 112 | recursion_count++;
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| 113 | ret = true;
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| 114 | }
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| 115 | unlock( lock );
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| 116 | return ret;
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| 117 | }
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| 118 |
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| 119 | void unlock(recursive_mutex_lock & this) with(this) {
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| 120 | lock( lock __cfaabi_dbg_ctx2 );
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| 121 | recursion_count--;
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| 122 | if( recursion_count == 0 ) {
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[ac2b598] | 123 | $thread * thrd = pop_head( blocked_threads );
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[09800e9] | 124 | owner = thrd;
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| 125 | recursion_count = (thrd ? 1 : 0);
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[ae66348] | 126 | unpark( thrd __cfaabi_dbg_ctx2 );
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[09800e9] | 127 | }
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| 128 | unlock( lock );
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| 129 | }
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| 130 |
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| 131 | //-----------------------------------------------------------------------------
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| 132 | // Conditions
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| 133 | void ?{}(condition_variable & this) {
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| 134 | this.blocked_threads{};
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| 135 | }
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| 136 |
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| 137 | void ^?{}(condition_variable & this) {
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| 138 | // default
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| 139 | }
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| 140 |
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| 141 | void notify_one(condition_variable & this) with(this) {
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| 142 | lock( lock __cfaabi_dbg_ctx2 );
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[3381ed7] | 143 | unpark(
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[ae66348] | 144 | pop_head( this.blocked_threads ) __cfaabi_dbg_ctx2
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[09800e9] | 145 | );
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| 146 | unlock( lock );
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| 147 | }
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| 148 |
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| 149 | void notify_all(condition_variable & this) with(this) {
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| 150 | lock( lock __cfaabi_dbg_ctx2 );
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| 151 | while(this.blocked_threads) {
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[3381ed7] | 152 | unpark(
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[ae66348] | 153 | pop_head( this.blocked_threads ) __cfaabi_dbg_ctx2
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[09800e9] | 154 | );
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| 155 | }
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| 156 | unlock( lock );
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| 157 | }
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| 158 |
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| 159 | void wait(condition_variable & this) {
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| 160 | lock( this.lock __cfaabi_dbg_ctx2 );
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| 161 | append( this.blocked_threads, kernelTLS.this_thread );
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[3381ed7] | 162 | unlock( this.lock );
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[ae66348] | 163 | park( __cfaabi_dbg_ctx );
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[09800e9] | 164 | }
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| 165 |
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| 166 | forall(dtype L | is_lock(L))
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| 167 | void wait(condition_variable & this, L & l) {
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| 168 | lock( this.lock __cfaabi_dbg_ctx2 );
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| 169 | append( this.blocked_threads, kernelTLS.this_thread );
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[3381ed7] | 170 | unlock(l);
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| 171 | unlock(this.lock);
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[ae66348] | 172 | park( __cfaabi_dbg_ctx );
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[8cc7dd1] | 173 | lock(l);
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[09800e9] | 174 | }
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| 175 |
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| 176 | //-----------------------------------------------------------------------------
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| 177 | // Scopes
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| 178 | forall(dtype L | is_lock(L))
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| 179 | void lock_all ( L * locks[], size_t count) {
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| 180 | // Sort locks based on addresses
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| 181 | __libcfa_small_sort(locks, count);
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| 182 |
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| 183 | // Lock all
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| 184 | for(size_t i = 0; i < count; i++) {
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| 185 | L * l = locks[i];
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| 186 | lock( *l );
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| 187 | }
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| 188 | }
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| 189 |
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| 190 | forall(dtype L | is_lock(L))
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| 191 | void unlock_all( L * locks[], size_t count) {
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| 192 | // Lock all
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| 193 | for(size_t i = 0; i < count; i++) {
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| 194 | L * l = locks[i];
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| 195 | unlock( *l );
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| 196 | }
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[121be3e] | 197 | }
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