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annotate src/thread/epoc/SDL_sysmutex.cpp @ 190:e4af2c852c09

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author Sam Lantinga <slouken@libsdl.org>
date Sun, 23 Sep 2001 18:19:44 +0000
parents 83018110dce8
children e8157fcb3114
rev   line source
173
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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@devolution.com
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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 }