text: /**
   **	\file Semaphore.h
   **	\date  2007-04-13
   **	\author grymse@alhem.net
  **/
  /*
  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.
  */
  #ifndef _SOCKETS_Semaphore_H
  #define _SOCKETS_Semaphore_H
  
  #include "sockets-config.h"
  #ifdef _WIN32
  #include "socket_include.h"
  #include <windows.h>
  #else
  #include <pthread.h>
  #ifdef MACOSX
  #include <sys/semaphore.h>
  #else
  #include <semaphore.h>
  #endif
  #endif
  
  
  #ifdef SOCKETS_NAMESPACE
  namespace SOCKETS_NAMESPACE {
  #endif
  
  #ifdef _WIN32
  typedef LONG value_t;
  #else
  typedef unsigned int value_t;
  #endif
  
  /** pthread semaphore wrapper.
      \ingroup threading */
  class Semaphore
  {
  public:
      Semaphore(value_t start_val = 0);
      ~Semaphore();
  
      /** \return 0 if successful */
      int Post();
      /** Wait for Post
          \return 0 if successful */
      int Wait();
  
      /** Not implemented for win32 */
      int TryWait();
  
      /** Not implemented for win32 */
      int GetValue(int&);
  
  private:
      Semaphore(const Semaphore&) {} // copy constructor
      Semaphore& operator=(const Semaphore&) { return *this; } // assignment operator
  #ifdef _WIN32
      HANDLE m_handle;
  #else
      sem_t m_sem;
  #endif
  };
  
  
  
  
  #ifdef SOCKETS_NAMESPACE
  } // namespace SOCKETS_NAMESPACE {
  #endif
  #endif // _SOCKETS_Semaphore_H
  
  