| 1 | #pragma once
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| 2 |
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| 3 | #include <stdbool.h>
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| 4 |
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| 5 | #include "bits/algorithm.hfa"
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| 6 | #include "bits/locks.hfa"
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| 7 | #include "bits/sequence.hfa"
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| 8 |
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| 9 | #include "invoke.h"
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| 10 |
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| 11 | #include "time_t.hfa"
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| 12 | #include "time.hfa"
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| 13 | #include <sys/time.h>
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| 14 | #include "alarm.hfa"
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| 15 |
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| 16 | ///////////////////////////////////////////////////////////////////
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| 17 | //// is_blocking_lock
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| 18 | ///////////////////////////////////////////////////////////////////
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| 19 |
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| 20 | trait is_blocking_lock(dtype L | sized(L)) {
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| 21 | void on_notify( L &, struct $thread * ); // For synchronization locks to use when acquiring
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| 22 | void on_wait( L & ); // For synchronization locks to use when releasing
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| 23 | size_t get_recursion_count( L & ); // to get recursion count for cond lock to reset after waking
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| 24 | void set_recursion_count( L &, size_t recursion ); // to set recursion count after getting signalled;
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| 25 | };
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| 26 |
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| 27 | ///////////////////////////////////////////////////////////////////
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| 28 | //// info_thread
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| 29 | ///////////////////////////////////////////////////////////////////
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| 30 |
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| 31 | // the info thread is a wrapper around a thread used
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| 32 | // to store extra data for use in the condition variable
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| 33 | forall(dtype L | is_blocking_lock(L)) {
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| 34 | struct info_thread {
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| 35 | inline Seqable; // used to put info_thread on a dl queue (aka sequence)
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| 36 | struct $thread * t; // waiting thread
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| 37 | uintptr_t info; // shadow field
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| 38 | L * lock; // lock that is passed to wait() (if one is passed)
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| 39 | bool signalled; // true when signalled and false when timeout wakes thread
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| 40 | };
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| 41 |
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| 42 |
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| 43 | void ?{}( info_thread(L) & this, $thread * t );
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| 44 | void ?{}( info_thread(L) & this, $thread * t, uintptr_t info );
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| 45 | void ^?{}( info_thread(L) & this );
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| 46 |
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| 47 | // for use by sequence
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| 48 | info_thread(L) *& Back( info_thread(L) * this );
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| 49 | info_thread(L) *& Next( info_thread(L) * this );
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| 50 | }
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| 51 |
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| 52 | ///////////////////////////////////////////////////////////////////
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| 53 | //// Blocking Locks
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| 54 | ///////////////////////////////////////////////////////////////////
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| 55 |
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| 56 | struct blocking_lock {
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| 57 | // Spin lock used for mutual exclusion
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| 58 | __spinlock_t lock;
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| 59 |
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| 60 | // List of blocked threads
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| 61 | Sequence( $thread ) blocked_threads;
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| 62 |
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| 63 | // Count of current blocked threads
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| 64 | size_t wait_count;
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| 65 |
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| 66 | // Flag if the lock allows multiple acquisition
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| 67 | bool multi_acquisition;
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| 68 |
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| 69 | // Flag if lock can be released by non owner
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| 70 | bool strict_owner;
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| 71 |
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| 72 | // Current thread owning the lock
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| 73 | struct $thread * owner;
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| 74 |
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| 75 | // Number of recursion level
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| 76 | size_t recursion_count;
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| 77 | };
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| 78 |
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| 79 | struct single_acquisition_lock {
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| 80 | inline blocking_lock;
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| 81 | };
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| 82 |
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| 83 | struct owner_lock {
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| 84 | inline blocking_lock;
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| 85 | };
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| 86 |
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| 87 | struct multiple_acquisition_lock {
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| 88 | inline blocking_lock;
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| 89 | };
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| 90 |
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| 91 | void ?{}( blocking_lock & this, bool multi_acquisition, bool strict_owner );
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| 92 | void ^?{}( blocking_lock & this );
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| 93 |
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| 94 | void ?{}( single_acquisition_lock & this );
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| 95 | void ^?{}( single_acquisition_lock & this );
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| 96 |
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| 97 | void ?{}( owner_lock & this );
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| 98 | void ^?{}( owner_lock & this );
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| 99 |
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| 100 | void ?{}( multiple_acquisition_lock & this );
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| 101 | void ^?{}( multiple_acquisition_lock & this );
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| 102 |
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| 103 | void lock( blocking_lock & this );
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| 104 | bool try_lock( blocking_lock & this );
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| 105 | void unlock( blocking_lock & this );
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| 106 | void on_notify( blocking_lock & this, struct $thread * t );
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| 107 | void on_wait( blocking_lock & this );
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| 108 | size_t wait_count( blocking_lock & this );
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| 109 | void set_recursion_count( blocking_lock & this, size_t recursion );
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| 110 | size_t get_recursion_count( blocking_lock & this );
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| 111 |
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| 112 | void lock( single_acquisition_lock & this );
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| 113 | void unlock( single_acquisition_lock & this );
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| 114 | void on_notify( single_acquisition_lock & this, struct $thread * t );
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| 115 | void on_wait( single_acquisition_lock & this );
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| 116 | void set_recursion_count( single_acquisition_lock & this, size_t recursion );
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| 117 | size_t get_recursion_count( single_acquisition_lock & this );
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| 118 |
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| 119 | void lock( owner_lock & this );
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| 120 | void unlock( owner_lock & this );
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| 121 | void on_notify( owner_lock & this, struct $thread * t );
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| 122 | void on_wait( owner_lock & this );
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| 123 | void set_recursion_count( owner_lock & this, size_t recursion );
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| 124 | size_t get_recursion_count( owner_lock & this );
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| 125 |
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| 126 | void lock( multiple_acquisition_lock & this );
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| 127 | void unlock( multiple_acquisition_lock & this );
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| 128 | void on_notify( multiple_acquisition_lock & this, struct $thread * t );
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| 129 | void on_wait( multiple_acquisition_lock & this );
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| 130 | void set_recursion_count( multiple_acquisition_lock & this, size_t recursion );
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| 131 | size_t get_recursion_count( multiple_acquisition_lock & this );
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| 132 |
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| 133 | ///////////////////////////////////////////////////////////////////
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| 134 | //// Synchronization Locks
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| 135 | ///////////////////////////////////////////////////////////////////
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| 136 | forall(dtype L | is_blocking_lock(L)) {
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| 137 | struct condition_variable {
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| 138 | // Spin lock used for mutual exclusion
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| 139 | __spinlock_t lock;
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| 140 |
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| 141 | // List of blocked threads
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| 142 | Sequence( info_thread(L) ) blocked_threads;
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| 143 |
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| 144 | // Count of current blocked threads
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| 145 | int count;
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| 146 | };
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| 147 |
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| 148 | void ?{}( condition_variable(L) & this );
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| 149 | void ^?{}( condition_variable(L) & this );
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| 150 |
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| 151 | struct alarm_node_wrap {
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| 152 | alarm_node_t alarm_node;
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| 153 |
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| 154 | condition_variable(L) * cond;
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| 155 |
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| 156 | info_thread(L) * i;
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| 157 | };
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| 158 |
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| 159 | void ?{}( alarm_node_wrap(L) & this, Time alarm, Duration period, Alarm_Callback callback );
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| 160 | void ^?{}( alarm_node_wrap(L) & this );
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| 161 |
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| 162 | void alarm_node_callback( alarm_node_wrap(L) & this );
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| 163 |
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| 164 | void alarm_node_wrap_cast( alarm_node_t & a );
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| 165 |
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| 166 | bool notify_one( condition_variable(L) & this );
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| 167 | bool notify_all( condition_variable(L) & this );
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| 168 |
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| 169 | uintptr_t front( condition_variable(L) & this );
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| 170 |
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| 171 | bool empty( condition_variable(L) & this );
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| 172 | int counter( condition_variable(L) & this );
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| 173 |
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| 174 | void wait( condition_variable(L) & this );
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| 175 | void wait( condition_variable(L) & this, uintptr_t info );
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| 176 | bool wait( condition_variable(L) & this, Duration duration );
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| 177 | bool wait( condition_variable(L) & this, uintptr_t info, Duration duration );
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| 178 | bool wait( condition_variable(L) & this, Time time );
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| 179 | bool wait( condition_variable(L) & this, uintptr_t info, Time time );
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| 180 |
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| 181 | void wait( condition_variable(L) & this, L & l );
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| 182 | void wait( condition_variable(L) & this, L & l, uintptr_t info );
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| 183 | bool wait( condition_variable(L) & this, L & l, Duration duration );
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| 184 | bool wait( condition_variable(L) & this, L & l, uintptr_t info, Duration duration );
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| 185 | bool wait( condition_variable(L) & this, L & l, Time time );
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| 186 | bool wait( condition_variable(L) & this, L & l, uintptr_t info, Time time );
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| 187 | }
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