Added initial support for EPOC/Symbian OS (thanks Hannu!)

--HG--
extra : convert_revision : svn%3Ac70aab31-4412-0410-b14c-859654838e24/trunk%40174

src/thread/epoc/SDL_sysmutex.cpp

@@ -0,0 +1,112 @@
+/*
+    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 =
+ "@(#) $Id$";
+#endif
+
+/* Mutex functions using the Win32 API */
+
+//#include <stdio.h>
+//#include <stdlib.h>
+
+#include<e32std.h>
+
+#include "SDL_error.h"
+#include "SDL_mutex.h"
+
+
+
+struct SDL_mutex
+    {
+    TInt handle;
+    };
+
+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);
+    }
+
+/* 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();
+	return(mutex);
+}
+
+/* Free the mutex */
+void SDL_DestroyMutex(SDL_mutex *mutex)
+{
+	if ( mutex ) 
+	{
+    RMutex rmutex;
+    rmutex.SetHandle(mutex->handle);
+	rmutex.Signal();
+	rmutex.Close();
+	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);
+}