a988941bf2
* Kill the thread only if is alive. * Remove rz_th_lock_guard. * Use rz_sys_usleep since pthread_yield/sched_yield are not portable. * Kill threads only on error. * Avoid killing already-dead threads. * RzThreadFunction now returns void* and added test_thread_queue. * Removed pthread_exit
85 lines
2.4 KiB
C
85 lines
2.4 KiB
C
// SPDX-FileCopyrightText: 2009-2020 thestr4ng3r <info@florianmaerkl.de>
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// SPDX-FileCopyrightText: 2022 deroad <wargio@libero.it>
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// SPDX-License-Identifier: LGPL-3.0-only
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#include "thread.h"
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/**
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* \brief Condition variables are intended to be used to communicate changes in the state of data shared between threads.
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* Condition variables are always associated with a mutex to provide synchronized access to the shared data.
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*
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* \return On success returns a valid pointer to a RzThreadCond structure.
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*/
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RZ_API RZ_OWN RzThreadCond *rz_th_cond_new(void) {
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RzThreadCond *cond = RZ_NEW0(RzThreadCond);
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if (!cond) {
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return NULL;
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}
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#if HAVE_PTHREAD
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if (pthread_cond_init(&cond->cond, NULL) != 0) {
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free(cond);
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return NULL;
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}
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#elif __WINDOWS__
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InitializeConditionVariable(&cond->cond);
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#endif
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return cond;
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}
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/**
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* \brief This function shall unblock at least one of the threads that are blocked on the specified condition
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*
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* \param cond The RzThreadCond to use for signalling a waiting thread
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*/
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RZ_API void rz_th_cond_signal(RZ_NONNULL RzThreadCond *cond) {
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rz_return_if_fail(cond);
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#if HAVE_PTHREAD
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pthread_cond_signal(&cond->cond);
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#elif __WINDOWS__
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WakeConditionVariable(&cond->cond);
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#endif
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}
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/**
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* \brief This function shall unblock all threads currently blocked on the specified condition
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*
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* \param cond The RzThreadCond to use for signalling all waiting threads
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*/
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RZ_API void rz_th_cond_signal_all(RZ_NONNULL RzThreadCond *cond) {
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rz_return_if_fail(cond);
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#if HAVE_PTHREAD
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pthread_cond_broadcast(&cond->cond);
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#elif __WINDOWS__
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WakeAllConditionVariable(&cond->cond);
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#endif
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}
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/**
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* \brief The function shall block on a condition variable and shall be called with RzThreadLock locked by the calling thread.
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*
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* \param cond The RzThreadCond to use for waiting the signal
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* \param lock The RzThreadLock lock to use (the lock must be already taken by the thread)
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*/
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RZ_API void rz_th_cond_wait(RZ_NONNULL RzThreadCond *cond, RZ_NONNULL RzThreadLock *lock) {
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rz_return_if_fail(cond);
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#if HAVE_PTHREAD
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pthread_cond_wait(&cond->cond, &lock->lock);
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#elif __WINDOWS__
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SleepConditionVariableCS(&cond->cond, &lock->lock, INFINITE);
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#endif
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}
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/**
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* \brief Frees a RzThreadCond struct
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*
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* \param cond The RzThreadCond to free
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*/
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RZ_API void rz_th_cond_free(RZ_NULLABLE RzThreadCond *cond) {
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if (!cond) {
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return;
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}
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#if HAVE_PTHREAD
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pthread_cond_destroy(&cond->cond);
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#endif
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free(cond);
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}
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