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annotate src/thread/epoc/SDL_sysmutex.cpp @ 1240:3b8a43c428bb

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From Bug #36: There are a couple of issues with the selection of Altivec alpha-blitting routines in CalculateAlphaBlit() in src/video/SDL_Blit_A.c. 1) There's no check for the presence of Altivec when checking if the Blit32to565PixelAlphaAltivec() routine can be selected. 2) Altivec cannot be used in video memory, and there's no check if the destination surface is a hardware surface. (Alpha-blitting to a hardware surface with GPU support is a bad idea, but somebody's bound to do it anyway.) Patch to fix these attached.
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 08 Jan 2006 21:18:15 +0000
parents e8157fcb3114
children c9b51268668f
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997, 1998, 1999, 2000 Sam Lantinga
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4
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5 This library is free software; you can redistribute it and/or
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6 modify it under the terms of the GNU Library General Public
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7 License as published by the Free Software Foundation; either
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8 version 2 of the License, or (at your option) any later version.
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9
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10 This library is distributed in the hope that it will be useful,
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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13 Library General Public License for more details.
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14
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15 You should have received a copy of the GNU Library General Public
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16 License along with this library; if not, write to the Free
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17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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18
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19 Sam Lantinga
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20 slouken@libsdl.org
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21 */
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22
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23 /*
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24 SDL_sysmutex.cpp
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25
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26 Epoc version by Markus Mertama (w@iki.fi)
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27 */
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28
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29
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30 #ifdef SAVE_RCSID
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31 static char rcsid =
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32 "@(#) $Id$";
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33 #endif
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34
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35 /* Mutex functions using the Win32 API */
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36
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37 //#include <stdio.h>
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38 //#include <stdlib.h>
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39
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40 #include<e32std.h>
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41
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42 #include "SDL_error.h"
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43 #include "SDL_mutex.h"
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44
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45
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46
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47 struct SDL_mutex
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48 {
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49 TInt handle;
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50 };
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51
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52 extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);
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53
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54 TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)
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55 {
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56 return ((RMutex*)aPtr1)->CreateGlobal(aName);
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57 }
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58
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59 /* Create a mutex */
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60 SDL_mutex *SDL_CreateMutex(void)
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61 {
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62 RMutex rmutex;
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63
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64 TInt status = CreateUnique(NewMutex, &rmutex, NULL);
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65 if(status != KErrNone)
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66 {
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67 SDL_SetError("Couldn't create mutex");
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68 }
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69 SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;
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70 mutex->handle = rmutex.Handle();
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71 return(mutex);
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72 }
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73
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74 /* Free the mutex */
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75 void SDL_DestroyMutex(SDL_mutex *mutex)
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76 {
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77 if ( mutex )
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78 {
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79 RMutex rmutex;
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80 rmutex.SetHandle(mutex->handle);
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81 rmutex.Signal();
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82 rmutex.Close();
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83 delete(mutex);
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84 mutex = NULL;
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85 }
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86 }
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87
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88 /* Lock the mutex */
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89 int SDL_mutexP(SDL_mutex *mutex)
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90 {
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91 if ( mutex == NULL ) {
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92 SDL_SetError("Passed a NULL mutex");
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93 return -1;
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94 }
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95 RMutex rmutex;
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96 rmutex.SetHandle(mutex->handle);
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97 rmutex.Wait();
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98 return(0);
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99 }
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100
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101 /* Unlock the mutex */
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102 int SDL_mutexV(SDL_mutex *mutex)
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103 {
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104 if ( mutex == NULL ) {
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105 SDL_SetError("Passed a NULL mutex");
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106 return -1;
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107 }
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108 RMutex rmutex;
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109 rmutex.SetHandle(mutex->handle);
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110 rmutex.Signal();
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111 return(0);
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112 }