| /* |
| SDL - Simple DirectMedia Layer |
| Copyright (C) 1997-2006 Sam Lantinga |
| |
| This library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 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 |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with this library; if not, write to the Free Software |
| Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA |
| |
| Sam Lantinga |
| slouken@libsdl.org |
| */ |
| #include "SDL_config.h" |
| |
| /* |
| SDL_sysmutex.cpp |
| |
| Epoc version by Markus Mertama (w@iki.fi) |
| */ |
| |
| |
| /* Mutex functions using the Win32 API */ |
| |
| #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); |
| } |