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87 lines
3 KiB
C++
87 lines
3 KiB
C++
/*************************************************************************/
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/* semaphore_posix.cpp */
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/*************************************************************************/
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/* This file is part of: */
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/* GODOT ENGINE */
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/* https://godotengine.org */
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/*************************************************************************/
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/* Copyright (c) 2007-2019 Juan Linietsky, Ariel Manzur. */
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/* Copyright (c) 2014-2019 Godot Engine contributors (cf. AUTHORS.md) */
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/* */
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/* Permission is hereby granted, free of charge, to any person obtaining */
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/* a 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, sublicense, 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 shall be */
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/* included in all copies or substantial portions of the Software. */
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/* */
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/* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, */
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/* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF */
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/* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*/
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/* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY */
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/* 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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#include "semaphore_posix.h"
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#if defined(UNIX_ENABLED) || defined(PTHREAD_ENABLED)
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#include "core/os/memory.h"
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#include <errno.h>
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#include <stdio.h>
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Error SemaphorePosix::wait() {
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while (sem_wait(&sem)) {
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if (errno == EINTR) {
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errno = 0;
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continue;
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} else {
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perror("sem waiting");
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return ERR_BUSY;
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}
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}
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return OK;
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}
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Error SemaphorePosix::post() {
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return (sem_post(&sem) == 0) ? OK : ERR_BUSY;
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}
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int SemaphorePosix::get() const {
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int val;
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sem_getvalue(&sem, &val);
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return val;
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}
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Semaphore *SemaphorePosix::create_semaphore_posix() {
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return memnew(SemaphorePosix);
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}
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void SemaphorePosix::make_default() {
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create_func = create_semaphore_posix;
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}
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SemaphorePosix::SemaphorePosix() {
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int r = sem_init(&sem, 0, 0);
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if (r != 0)
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perror("sem creating");
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}
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SemaphorePosix::~SemaphorePosix() {
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sem_destroy(&sem);
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}
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#endif
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