SDL_sysmutex.cpp
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/*
SDL - Simple DirectMedia Layer
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Copyright (C) 1997-2009 Sam Lantinga
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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);
}