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annotate src/thread/epoc/SDL_sysmutex.cpp @ 3946:259aaca0fb0c SDL-1.2

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Use system memset/memcpy on Mac OS X, since Apple hand-tunes these for each processor they ship (and thus, it's likely to beat our code on PowerPC and Intel and whatever variants or new archs show up later).
author Ryan C. Gordon <icculus@icculus.org>
date Sun, 03 Jun 2007 06:52:06 +0000
parents 92947e3a18db
children
rev   line source
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2006 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 Lesser General Public
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7 License as published by the Free Software Foundation; either
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8 version 2.1 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 Lesser 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 Lesser General Public
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16 License along with this library; if not, write to the Free Software
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 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 #include "SDL_config.h"
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23
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24 /*
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25 SDL_sysmutex.cpp
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26
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27 Epoc version by Markus Mertama (w@iki.fi)
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28 */
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29
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30
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31 /* Mutex functions using the Win32 API */
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32
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33 #include<e32std.h>
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34
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35 #include "SDL_error.h"
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36 #include "SDL_mutex.h"
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37
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38
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39
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40 struct SDL_mutex
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41 {
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42 TInt handle;
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43 };
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44
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45 extern TInt CreateUnique(TInt (*aFunc)(const TDesC& aName, TAny*, TAny*), TAny*, TAny*);
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46
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47 TInt NewMutex(const TDesC& aName, TAny* aPtr1, TAny*)
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48 {
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49 return ((RMutex*)aPtr1)->CreateGlobal(aName);
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50 }
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51
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52 /* Create a mutex */
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53 SDL_mutex *SDL_CreateMutex(void)
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54 {
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55 RMutex rmutex;
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56
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57 TInt status = CreateUnique(NewMutex, &rmutex, NULL);
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58 if(status != KErrNone)
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59 {
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60 SDL_SetError("Couldn't create mutex");
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61 }
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62 SDL_mutex* mutex = new /*(ELeave)*/ SDL_mutex;
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63 mutex->handle = rmutex.Handle();
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64 return(mutex);
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65 }
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66
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67 /* Free the mutex */
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68 void SDL_DestroyMutex(SDL_mutex *mutex)
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69 {
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70 if ( mutex )
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71 {
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72 RMutex rmutex;
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73 rmutex.SetHandle(mutex->handle);
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74 rmutex.Signal();
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75 rmutex.Close();
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76 delete(mutex);
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77 mutex = NULL;
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78 }
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79 }
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80
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81 /* Lock the mutex */
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82 int SDL_mutexP(SDL_mutex *mutex)
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83 {
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84 if ( mutex == NULL ) {
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85 SDL_SetError("Passed a NULL mutex");
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86 return -1;
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87 }
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88 RMutex rmutex;
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89 rmutex.SetHandle(mutex->handle);
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90 rmutex.Wait();
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91 return(0);
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92 }
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93
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94 /* Unlock the mutex */
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95 int SDL_mutexV(SDL_mutex *mutex)
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96 {
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97 if ( mutex == NULL ) {
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98 SDL_SetError("Passed a NULL mutex");
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99 return -1;
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100 }
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101 RMutex rmutex;
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102 rmutex.SetHandle(mutex->handle);
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103 rmutex.Signal();
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104 return(0);
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105 }