/**
 * cf_thread.c
 */
#include "cf_thread.h"
#include "cf_local.h"

#include <stdlib.h>

#ifdef _WIN32
# include <windows.h>
# include <process.h>
# define THREAD_TYPE	HANDLE
# define MUTEX_TYPE		HANDLE
#else // #ifdef _WIN32
# include <pthread.h>
# define THREAD_TYPE	pthread_t
# define MUTEX_TYPE		pthread_mutex_t
#endif // #ifdef _WIN32

#define CHECK_INVALID_THREAD(__h)		\
	if (__h == NULL)					\
		return CF_ERROR_THREAD_INVALID_ARGS

#define CHECK_INVALID_MUTEX(__h)		\
	if (__h == NULL)					\
		return CF_ERROR_MUTEX_INVALID_ARGS

int
CF_Thread_Local_Close (void * ctx)
{
#ifdef _WIN32
	CloseHandle (ctx);
#else
	free (ctx);
#endif

	return CF_OK;
}

int
CF_Thread_Create (CF_Thread				* threadID,
				  CF_Thread_Function	callback,
				  void					* arg)
{
	int result = 0;

#ifdef _WIN32
	*threadID = (THREAD_TYPE) _beginthreadex (0, 0, callback, arg, 0, 0);
	if (*threadID == NULL)
		return CF_ERROR_THREAD_CREATE;
#else
	*threadID = (THREAD_TYPE *) calloc (sizeof (THREAD_TYPE), 1);
	if (*threadID == NULL)
		return CF_ERROR_THREAD_CREATE;

	result = pthread_create ((THREAD_TYPE *) *threadID, NULL, callback, arg);
	if (result < 0)
		return CF_ERROR_THREAD_CREATE;
#endif

	return CF_OK;
}

int
CF_Thread_Release (CF_Thread * threadID)
{
	CHECK_INVALID_THREAD (*threadID);

	CF_Thread_Local_Close (*threadID);

	return CF_OK;
}

int
CF_Thread_Join (CF_Thread * threadID)
{
	CHECK_INVALID_THREAD (*threadID);

#ifdef _WIN32
	WaitForSingleObject ((THREAD_TYPE) *threadID, INFINITE);
#else
	char status[16] = {0x00,};
	pthread_join (*((THREAD_TYPE *) *threadID), (void **)status);
#endif

	return CF_OK;
}

int
CF_Mutex_Create (CF_Mutex * mutex)
{
	int result = 0;

#ifdef _WIN32
	*mutex = (MUTEX_TYPE) CreateMutexA (NULL, FALSE, NULL);
	if (*mutex == NULL)
		return CF_ERROR_MUTEX_CREATE;
#else
	*mutex = (MUTEX_TYPE *) calloc (sizeof (MUTEX_TYPE), 1);
	if (*mutex == NULL)
		return CF_ERROR_MUTEX_CREATE;

	result = pthread_mutex_init (*mutex, NULL);
	if (result < 0)
		return CF_ERROR_MUTEX_CREATE;
#endif

	return CF_OK;
}

int
CF_Mutex_Destory (CF_Mutex * mutex)
{
	CHECK_INVALID_MUTEX (*mutex);

	CF_Thread_Local_Close (*mutex);

	return CF_OK;
}

int
CF_Mutex_Lock (CF_Mutex * mutex)
{
	CHECK_INVALID_MUTEX (*mutex);

#ifdef _WIN32
	WaitForSingleObject ((MUTEX_TYPE) *mutex, INFINITE);
#else
	pthread_mutex_lock ((MUTEX_TYPE *) *mutex);
#endif

	return CF_OK;
}

int
CF_Mutex_Unlock (CF_Mutex * mutex)
{
	CHECK_INVALID_MUTEX (*mutex);

#ifdef _WIN32
	ReleaseMutex (*mutex);
#else
	pthread_mutex_unlock ((MUTEX_TYPE *) *mutex);
#endif

	return CF_OK;
}