| 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 | } |