/*

    SDL - Simple DirectMedia Layer

    Copyright (C) 1997, 1998, 1999, 2000  Sam Lantinga

    This library is free software; you can redistribute it and/or

    modify it under the terms of the GNU Library General Public

    License as published by the Free Software Foundation; either

    version 2 of the License, or (at your option) any later version.

    This library 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

    Library General Public License for more details.

    You should have received a copy of the GNU Library General Public

    License along with this library; if not, write to the Free

    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

    Sam Lantinga

    slouken@devolution.com

*/

/*

    SDL_sysmutex.cpp

    Epoc version by Markus Mertama (w@iki.fi)

*/

#ifdef SAVE_RCSID

static char rcsid =

 "@(#) $Id: SDL_sysmutex.c,v 1.1.2.3 2000/06/22 15:25:23 hercules Exp $";

#endif

/* Mutex functions using the Win32 API */

//#include <stdio.h>

//#include <stdlib.h>

#include <e32std.h>

#include "epoc_sdl.h"

#include "SDL_error.h"

#include "SDL_mutex.h"

#ifdef EKA2 //???

struct SDL_mutex

    {

    TInt handle;

    };

#else

struct _SDL_mutex

    {

    TInt handle;

    };

#endif

extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);

TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)

    {

    return ((RMutex*)aPtr1)->CreateGlobal(aName);

    }

void DeleteMutex(TAny* aMutex)

    {

    SDL_DestroyMutex ((SDL_mutex*) aMutex);

    }

/* Create a mutex */

SDL_mutex *SDL_CreateMutex(void)

{

    RMutex rmutex;

    TInt status = CreateUnique(NewMutex, &rmutex, NULL);

	if(status != KErrNone)

	    {

			SDL_SetError("Couldn't create mutex");

		}

    SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;

    mutex->handle = rmutex.Handle();

    EpocSdlEnv::AppendCleanupItem(TSdlCleanupItem(DeleteMutex, mutex));

	return(mutex);

}

/* Free the mutex */

void SDL_DestroyMutex(SDL_mutex *mutex)

{

	if ( mutex ) 

	{

    RMutex rmutex;

    rmutex.SetHandle(mutex->handle);

    if(rmutex.IsHeld())

        {

	    rmutex.Signal();

        }

	rmutex.Close();

	EpocSdlEnv::RemoveCleanupItem(mutex);

	delete(mutex);

    mutex = NULL;

	}

}

/* Lock the mutex */

int SDL_mutexP(SDL_mutex *mutex)

{

	if ( mutex == NULL ) {

		SDL_SetError("Passed a NULL mutex");

		return -1;

	}

    RMutex rmutex;

    rmutex.SetHandle(mutex->handle);

	rmutex.Wait(); 

	return(0);

}

/* Unlock the mutex */

int SDL_mutexV(SDL_mutex *mutex)

{

	if ( mutex == NULL ) {

		SDL_SetError("Passed a NULL mutex");

		return -1;

	}

	RMutex rmutex;

    rmutex.SetHandle(mutex->handle);

	rmutex.Signal();

	return(0);

}