| /* |
| Simple DirectMedia Layer |
| Copyright (C) 1997-2022 Sam Lantinga <slouken@libsdl.org> |
| |
| This software is provided 'as-is', without any express or implied |
| warranty. In no event will the authors be held liable for any damages |
| arising from the use of this software. |
| |
| Permission is granted to anyone to use this software for any purpose, |
| including commercial applications, and to alter it and redistribute it |
| freely, subject to the following restrictions: |
| |
| 1. The origin of this software must not be misrepresented; you must not |
| claim that you wrote the original software. If you use this software |
| in a product, an acknowledgment in the product documentation would be |
| appreciated but is not required. |
| 2. Altered source versions must be plainly marked as such, and must not be |
| misrepresented as being the original software. |
| 3. This notice may not be removed or altered from any source distribution. |
| */ |
| #include "../../SDL_internal.h" |
| |
| /* An implementation of mutexes using the Symbian API. */ |
| |
| #include <e32std.h> |
| |
| #include "SDL_thread.h" |
| #include "SDL_systhread_c.h" |
| |
| struct SDL_mutex |
| { |
| TInt handle; |
| }; |
| |
| extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*); |
| |
| static 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; |
| } |
| } |
| |
| /* Try to lock the mutex */ |
| #if 0 |
| int |
| SDL_TryLockMutex(SDL_mutex * mutex) |
| { |
| if (mutex == NULL) |
| { |
| SDL_SetError("Passed a NULL mutex."); |
| return -1; |
| } |
| |
| // Not yet implemented. |
| return 0; |
| } |
| #endif |
| |
| /* Lock the mutex */ |
| int |
| SDL_LockMutex(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_UnlockMutex(SDL_mutex * mutex) |
| { |
| if ( mutex == NULL ) |
| { |
| SDL_SetError("Passed a NULL mutex."); |
| return -1; |
| } |
| |
| RMutex rmutex; |
| rmutex.SetHandle(mutex->handle); |
| rmutex.Signal(); |
| |
| return(0); |
| } |
| |
| /* vi: set ts=4 sw=4 expandtab: */ |