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/* Condition variables for multithreading.
Copyright (C) 2008-2021 Free Software Foundation, Inc.
This file is free software: you can redistribute it and/or modify
it under the terms of the GNU Lesser General Public License as
published by the Free Software Foundation; either version 2.1 of the
License, or (at your option) any later version.
This file is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public License
along with this program. If not, see <https://www.gnu.org/licenses/>. */
/* Written by Yoann Vandoorselaere <yoann@prelude-ids.org>, 2008,
and Bruno Haible <bruno@clisp.org>, 2008. */
#include <config.h>
#define _GLTHREAD_COND_INLINE _GL_EXTERN_INLINE
#include "glthread/cond.h"
/* ========================================================================= */
#if USE_ISOC_THREADS || USE_ISOC_AND_POSIX_THREADS
int
glthread_cond_init (gl_cond_t *condition)
{
if (cnd_init (&condition->condition) != thrd_success)
return ENOMEM;
condition->init_needed = 0;
return 0;
}
int
glthread_cond_wait (gl_cond_t *condition, gl_lock_t *lock)
{
if (condition->init_needed)
call_once (&condition->init_once, condition->init_func);
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
if (cnd_wait (&condition->condition, &lock->mutex) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_cond_timedwait (gl_cond_t *condition, gl_lock_t *lock,
const struct timespec *abstime)
{
if (condition->init_needed)
call_once (&condition->init_once, condition->init_func);
if (lock->init_needed)
call_once (&lock->init_once, lock->init_func);
switch (cnd_timedwait (&condition->condition, &lock->mutex, abstime))
{
case thrd_success:
break;
case thrd_timedout:
return ETIMEDOUT;
default:
return EINVAL;
}
return 0;
}
int
glthread_cond_signal (gl_cond_t *condition)
{
if (condition->init_needed)
call_once (&condition->init_once, condition->init_func);
if (cnd_signal (&condition->condition) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_cond_broadcast (gl_cond_t *condition)
{
if (condition->init_needed)
call_once (&condition->init_once, condition->init_func);
if (cnd_broadcast (&condition->condition) != thrd_success)
return EINVAL;
return 0;
}
int
glthread_cond_destroy (gl_cond_t *condition)
{
if (condition->init_needed)
call_once (&condition->init_once, condition->init_func);
cnd_destroy (&condition->condition);
return 0;
}
#endif
/* ========================================================================= */
#if USE_POSIX_THREADS
#endif
/* ========================================================================= */
#if USE_WINDOWS_THREADS
#endif
/* ========================================================================= */
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