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/*************************************************************************/
/* semaphore_posix.cpp */
/*************************************************************************/
/* This file is part of: */
/* GODOT ENGINE */
/* https://godotengine.org */
/*************************************************************************/
/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
/* */
/* Permission is hereby granted, free of charge, to any person obtaining */
/* a copy of this software and associated documentation files (the */
/* "Software"), to deal in the Software without restriction, including */
/* without limitation the rights to use, copy, modify, merge, publish, */
/* distribute, sublicense, and/or sell copies of the Software, and to */
/* permit persons to whom the Software is furnished to do so, subject to */
/* the following conditions: */
/* */
/* The above copyright notice and this permission notice shall be */
/* included in all copies or substantial portions of the Software. */
/* */
/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
/* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, */
/* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE */
/* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
/*************************************************************************/
#include "semaphore_posix.h"
#if defined(UNIX_ENABLED) || defined(PTHREAD_ENABLED)
#include "core/os/memory.h"
#include <errno.h>
#include <stdio.h>
Error SemaphorePosix::wait() {
while (sem_wait(&sem)) {
if (errno == EINTR) {
errno = 0;
continue;
} else {
perror("sem waiting");
return ERR_BUSY;
}
}
return OK;
}
Error SemaphorePosix::post() {
return (sem_post(&sem) == 0) ? OK : ERR_BUSY;
}
int SemaphorePosix::get() const {
int val;
sem_getvalue(&sem, &val);
return val;
}
Semaphore *SemaphorePosix::create_semaphore_posix() {
return memnew(SemaphorePosix);
}
void SemaphorePosix::make_default() {
create_func = create_semaphore_posix;
}
SemaphorePosix::SemaphorePosix() {
int r = sem_init(&sem, 0, 0);
if (r != 0)
perror("sem creating");
}
SemaphorePosix::~SemaphorePosix() {
sem_destroy(&sem);
}
#endif
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