[sdl_omap.git] / src / thread / symbian / SDL_sysmutex.cpp

/*
    SDL - Simple DirectMedia Layer
    Copyright (C) 1997-2009 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);
}
Commit	Line	Data
e14743d1	1	/*
	2	SDL - Simple DirectMedia Layer
	3	Copyright (C) 1997-2009 Sam Lantinga
	4
	5	This library is free software; you can redistribute it and/or
	6	modify it under the terms of the GNU Library General Public
	7	License as published by the Free Software Foundation; either
	8	version 2 of the License, or (at your option) any later version.
	9
	10	This library is distributed in the hope that it will be useful,
	11	but WITHOUT ANY WARRANTY; without even the implied warranty of
	12	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
	13	Library General Public License for more details.
	14
	15	You should have received a copy of the GNU Library General Public
	16	License along with this library; if not, write to the Free
	17	Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	18
	19	Sam Lantinga
	20	slouken@devolution.com
	21	*/
	22
	23	/*
	24	SDL_sysmutex.cpp
	25
	26	Epoc version by Markus Mertama (w@iki.fi)
	27	*/
	28
	29
	30	#ifdef SAVE_RCSID
	31	static char rcsid =
	32	"@(#) $Id: SDL_sysmutex.c,v 1.1.2.3 2000/06/22 15:25:23 hercules Exp $";
	33	#endif
	34
	35	/* Mutex functions using the Win32 API */
	36
	37	//#include <stdio.h>
	38	//#include <stdlib.h>
	39
	40	#include <e32std.h>
	41
	42	#include "epoc_sdl.h"
	43
	44	#include "SDL_error.h"
	45	#include "SDL_mutex.h"
	46
	47
	48	#ifdef EKA2 //???
	49	struct SDL_mutex
	50	{
	51	TInt handle;
	52	};
	53	#else
	54	struct _SDL_mutex
	55	{
	56	TInt handle;
	57	};
	58	#endif
	59
	60	extern TInt CreateUnique(TInt (aFunc)(const TDesC& aName, TAny, TAny), TAny, TAny*);
	61
	62	TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)
	63	{
	64	return ((RMutex*)aPtr1)->CreateGlobal(aName);
65	}
66
67	void DeleteMutex(TAny* aMutex)
68	{
69	SDL_DestroyMutex ((SDL_mutex*) aMutex);
70	}
71
72	/* Create a mutex */
73	SDL_mutex *SDL_CreateMutex(void)
74	{
75	RMutex rmutex;
76
77	TInt status = CreateUnique(NewMutex, &rmutex, NULL);
78	if(status != KErrNone)
79	{
80	SDL_SetError("Couldn't create mutex");
81	}
82	SDL_mutex* mutex = new /(ELeave)/ SDL_mutex;
83	mutex->handle = rmutex.Handle();
84	EpocSdlEnv::AppendCleanupItem(TSdlCleanupItem(DeleteMutex, mutex));
85	return(mutex);
86	}
87
88	/* Free the mutex */
89	void SDL_DestroyMutex(SDL_mutex *mutex)
90	{
91	if ( mutex )
92	{
93	RMutex rmutex;
94	rmutex.SetHandle(mutex->handle);
95	if(rmutex.IsHeld())
96	{
97	rmutex.Signal();
98	}
99	rmutex.Close();
100	EpocSdlEnv::RemoveCleanupItem(mutex);
101	delete(mutex);
102	mutex = NULL;
103	}
104	}
105
106	/* Lock the mutex */
107	int SDL_mutexP(SDL_mutex *mutex)
108	{
109	if ( mutex == NULL ) {
110	SDL_SetError("Passed a NULL mutex");
111	return -1;
112	}
113	RMutex rmutex;
114	rmutex.SetHandle(mutex->handle);
115	rmutex.Wait();
116	return(0);
117	}
118
119	/* Unlock the mutex */
120	int SDL_mutexV(SDL_mutex *mutex)
121	{
122	if ( mutex == NULL ) {
123	SDL_SetError("Passed a NULL mutex");
124	return -1;
125	}
126	RMutex rmutex;
127	rmutex.SetHandle(mutex->handle);
128	rmutex.Signal();
129	return(0);
130	}