/*
	PIP - Platform Independent Primitives

	Stephan Fomenko

	This program is free software: you can redistribute it and/or modify
	it under the terms of the GNU Lesser General Public License as published by
	the Free Software Foundation, either version 3 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 Lesser General Public License for more details.

	You should have received a copy of the GNU Lesser General Public License
	along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

#include "piconditionlock.h"
#ifdef WINDOWS
#  include <synchapi.h>
#else
#  include <pthread.h>
#endif


PRIVATE_DEFINITION_START(PIConditionLock)
#ifdef WINDOWS
	CRITICAL_SECTION
#else
	pthread_mutex_t
#endif
					nativeHandle;
PRIVATE_DEFINITION_END(PIConditionLock)


PIConditionLock::PIConditionLock() {
#ifdef WINDOWS
	InitializeCriticalSection(&PRIVATE->nativeHandle);
#else
	pthread_mutexattr_t attr;
	memset(&attr, 0, sizeof(attr));
	pthread_mutexattr_init(&attr);
	pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE);
	memset(&(PRIVATE->nativeHandle), 0, sizeof(PRIVATE->nativeHandle));
	pthread_mutex_init(&(PRIVATE->nativeHandle), &attr);
	pthread_mutexattr_destroy(&attr);
#endif
}


PIConditionLock::~PIConditionLock() {
#ifdef WINDOWS
	DeleteCriticalSection(&PRIVATE->nativeHandle);
#else
	pthread_mutex_destroy(&(PRIVATE->nativeHandle));
#endif
}


void PIConditionLock::lock() {
#ifdef WINDOWS
	EnterCriticalSection(&PRIVATE->nativeHandle);
#else
	pthread_mutex_lock(&(PRIVATE->nativeHandle));
#endif
}


void PIConditionLock::unlock() {
#ifdef WINDOWS
	LeaveCriticalSection(&PRIVATE->nativeHandle);
#else
	pthread_mutex_unlock(&(PRIVATE->nativeHandle));
#endif
}


void *PIConditionLock::handle() {
#ifdef WINDOWS
	return &PRIVATE->nativeHandle;
#else
	return &PRIVATE->nativeHandle;
#endif
}


bool PIConditionLock::tryLock() {
#ifdef WINDOWS
	return TryEnterCriticalSection(&PRIVATE->nativeHandle) != 0;
#else
	return (pthread_mutex_trylock(&(PRIVATE->nativeHandle)) == 0);
#endif
}