/*************************************************************************/ /* sem_osx.cpp */ /*************************************************************************/ /* This file is part of: */ /* GODOT ENGINE */ /* https://godotengine.org */ /*************************************************************************/ /* Copyright (c) 2007-2017 Juan Linietsky, Ariel Manzur. */ /* Copyright (c) 2014-2017 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 "sem_osx.h" #include <fcntl.h> #include <unistd.h> void cgsem_init(cgsem_t *cgsem) { int flags, fd, i; pipe(cgsem->pipefd); /* Make the pipes FD_CLOEXEC to allow them to close should we call * execv on restart. */ for (i = 0; i < 2; i++) { fd = cgsem->pipefd[i]; flags = fcntl(fd, F_GETFD, 0); flags |= FD_CLOEXEC; fcntl(fd, F_SETFD, flags); } } void cgsem_post(cgsem_t *cgsem) { const char buf = 1; write(cgsem->pipefd[1], &buf, 1); } void cgsem_wait(cgsem_t *cgsem) { char buf; read(cgsem->pipefd[0], &buf, 1); } void cgsem_destroy(cgsem_t *cgsem) { close(cgsem->pipefd[1]); close(cgsem->pipefd[0]); } #include "os/memory.h" #include <errno.h> Error SemaphoreOSX::wait() { cgsem_wait(&sem); return OK; } Error SemaphoreOSX::post() { cgsem_post(&sem); return OK; } int SemaphoreOSX::get() const { return 0; } Semaphore *SemaphoreOSX::create_semaphore_osx() { return memnew(SemaphoreOSX); } void SemaphoreOSX::make_default() { create_func = create_semaphore_osx; } SemaphoreOSX::SemaphoreOSX() { cgsem_init(&sem); } SemaphoreOSX::~SemaphoreOSX() { cgsem_destroy(&sem); }