88 lines
3 KiB
C++
88 lines
3 KiB
C++
/*************************************************************************/
|
|
/* semaphore_posix.cpp */
|
|
/*************************************************************************/
|
|
/* This file is part of: */
|
|
/* GODOT ENGINE */
|
|
/* https://godotengine.org */
|
|
/*************************************************************************/
|
|
/* Copyright (c) 2007-2020 Juan Linietsky, Ariel Manzur. */
|
|
/* Copyright (c) 2014-2020 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 "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
|