/**
 *******************************************************************************
 * @file etk/Semaphore.h
 * @brief Ewol Tool Kit : basic semaphore system (header)
 * @author Edouard DUPIN
 * @date 15/08/2012
 * @par Project
 * Ewol TK
 *
 * @par Copyright
 * Copyright 2011 Edouard DUPIN, all right reserved
 *
 * This software is distributed in the hope that it will be useful, but WITHOUT
 * ANY WARRANTY.
 *
 * Licence summary : 
 *    You can modify and redistribute the sources code and binaries.
 *    You can send me the bug-fix
 *
 * Term of the licence in in the file licence.txt.
 *
 *******************************************************************************
 */

#ifndef __ETK_SEMAPHORE_H__
#define __ETK_SEMAPHORE_H__

#include <etk/Types.h>

#ifdef __TARGET_OS__Windows
	#include <windows.h>
#else
	#include <pthread.h>
#endif

namespace etk
{
	class Semaphore
	{
		private:
			#ifdef __TARGET_OS__Windows
				HANDLE           m_semaphore;
			#else
				pthread_mutex_t  m_mutex;
				pthread_cond_t   m_condition;
				uint32_t         m_data;
				uint32_t         m_maximum;
			#endif
		public:
			Semaphore(uint32_t nbBasicElement=0, uint32_t nbMessageMax=1);
			~Semaphore(void);
			uint32_t GetCount(void);
			void Post(void);
			void Wait(void);
			// wait with a timeout in us; return true if get the semaphore
			bool Wait(uint32_t timeOutInUs);
	};
	
};

#endif