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Semaphore.cpp Go to the documentation of this file. /* Copyright (C) 2007-2011 Anders Hedstrom This library is made available under the terms of the GNU GPL, with the additional exemption that compiling, linking, and/or using OpenSSL is allowed. If you would like to use this library in a closed-source application, a separate license agreement is available. For information about the closed-source license agreement for the C++ sockets library, please visit http://www.alhem.net/Sockets/license.html and/or email license@alhem.net. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version. This program 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "Semaphore.h" #ifdef SOCKETS_NAMESPACE namespace SOCKETS_NAMESPACE { #endif // --------------------------------------------------------------- #ifdef _WIN32 Semaphore::Semaphore(value_t start_val) { m_handle = ::CreateSemaphore((LPSECURITY_ATTRIBUTES)NULL, start_val, 1, (LPCTSTR)NULL); } Semaphore::~Semaphore() { ::CloseHandle(m_handle); } int Semaphore::Post() { return (::ReleaseSemaphore(m_handle, 1, (LPLONG)NULL) != 0) ? 0 : -1; } int Semaphore::Wait() { return (WaitForSingleObject(m_handle, INFINITE) == WAIT_OBJECT_0) ? 0 : -1; } int Semaphore::TryWait() { return -1; // %! not implemented } int Semaphore::GetValue(int& i) { return 0; // %! not implemented } // --------------------------------------------------------------- #else Semaphore::Semaphore(value_t start_val) { sem_init(&m_sem, 0, start_val); } Semaphore::~Semaphore() { sem_destroy(&m_sem); } int Semaphore::Post() { return sem_post(&m_sem); } int Semaphore::Wait() { return sem_wait(&m_sem); } int Semaphore::TryWait() { return sem_trywait(&m_sem); } int Semaphore::GetValue(int& i) { return sem_getvalue(&m_sem, &i); } #endif #ifdef SOCKETS_NAMESPACE } // namespace SOCKETS_NAMESPACE { #endif

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