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