150 lines
3.9 KiB
C
150 lines
3.9 KiB
C
/**************************************************************************
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*
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* Copyright 2020 Lag Free Games, LLC
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* All Rights Reserved.
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the
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* "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish,
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* distribute, sub license, and/or sell copies of the Software, and to
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* permit persons to whom the Software is furnished to do so, subject to
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* the following conditions:
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*
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* The above copyright notice and this permission notice (including the
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* next paragraph) shall be included in all copies or substantial portions
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* of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NON-INFRINGEMENT.
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* IN NO EVENT SHALL VMWARE AND/OR ITS SUPPLIERS BE LIABLE FOR
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* ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
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* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
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* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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**************************************************************************/
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#ifndef CND_MONOTONIC_H
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#define CND_MONOTONIC_H
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#include "c11/threads.h"
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#include "util/os_time.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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struct u_cnd_monotonic
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{
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#ifdef _WIN32
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CONDITION_VARIABLE condvar;
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#else
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pthread_cond_t cond;
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#endif
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};
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static inline int
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u_cnd_monotonic_init(struct u_cnd_monotonic *cond)
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{
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assert(cond != NULL);
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#ifdef _WIN32
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InitializeConditionVariable(&cond->condvar);
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return thrd_success;
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#else
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int ret = thrd_error;
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pthread_condattr_t condattr;
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if (pthread_condattr_init(&condattr) == 0) {
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if ((pthread_condattr_setclock(&condattr, CLOCK_MONOTONIC) == 0) &&
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(pthread_cond_init(&cond->cond, &condattr) == 0)) {
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ret = thrd_success;
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}
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pthread_condattr_destroy(&condattr);
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}
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return ret;
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#endif
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}
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static inline void
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u_cnd_monotonic_destroy(struct u_cnd_monotonic *cond)
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{
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assert(cond != NULL);
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#ifdef _WIN32
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// Do nothing
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#else
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pthread_cond_destroy(&cond->cond);
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#endif
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}
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static inline int
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u_cnd_monotonic_broadcast(struct u_cnd_monotonic *cond)
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{
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assert(cond != NULL);
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#ifdef _WIN32
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WakeAllConditionVariable(&cond->condvar);
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return thrd_success;
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#else
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return (pthread_cond_broadcast(&cond->cond) == 0) ? thrd_success : thrd_error;
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#endif
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}
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static inline int
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u_cnd_monotonic_signal(struct u_cnd_monotonic *cond)
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{
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assert(cond != NULL);
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#ifdef _WIN32
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WakeConditionVariable(&cond->condvar);
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return thrd_success;
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#else
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return (pthread_cond_signal(&cond->cond) == 0) ? thrd_success : thrd_error;
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#endif
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}
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static inline int
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u_cnd_monotonic_timedwait(struct u_cnd_monotonic *cond, mtx_t *mtx, const struct timespec *abs_time)
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{
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assert(cond != NULL);
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assert(mtx != NULL);
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assert(abs_time != NULL);
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#ifdef _WIN32
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const uint64_t future = (abs_time->tv_sec * 1000) + (abs_time->tv_nsec / 1000000);
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const uint64_t now = os_time_get_nano() / 1000000;
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const DWORD timeout = (future > now) ? (DWORD)(future - now) : 0;
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if (SleepConditionVariableCS(&cond->condvar, mtx, timeout))
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return thrd_success;
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return (GetLastError() == ERROR_TIMEOUT) ? thrd_timedout : thrd_error;
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#else
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int rt = pthread_cond_timedwait(&cond->cond, mtx, abs_time);
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if (rt == ETIMEDOUT)
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return thrd_timedout;
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return (rt == 0) ? thrd_success : thrd_error;
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#endif
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}
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static inline int
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u_cnd_monotonic_wait(struct u_cnd_monotonic *cond, mtx_t *mtx)
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{
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assert(cond != NULL);
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assert(mtx != NULL);
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#ifdef _WIN32
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SleepConditionVariableCS(&cond->condvar, mtx, INFINITE);
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return thrd_success;
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#else
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return (pthread_cond_wait(&cond->cond, mtx) == 0) ? thrd_success : thrd_error;
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#endif
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}
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#ifdef __cplusplus
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}
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#endif
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#endif
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