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annotate src/thread/riscos/SDL_syscond.c @ 1118:65f4b2dd46b7

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Date: Wed, 17 Aug 2005 11:23:40 -0400 From: Matt L <prometheus.uw@gmail.com> To: "Ryan C. Gordon" <icculus@clutteredmind.org> Subject: SDL Patch Hio, I saw your last call on the mailing list. Here's a patch which I submitted about two weeks ago which hasn't made it in. In the current sdl.m4, there's a bug where if your configure.ac, you have AC_LANG(C++) specified, it won't properly compile and link the SDL test program when you run the configure script. This is because only the default CFLAGS is overriden in sdl.m4, and in the patch below, I've fixed it so it overrides CXXFLAGS as well, allowing it to work with g++.
author Ryan C. Gordon <icculus@icculus.org>
date Thu, 18 Aug 2005 06:06:02 +0000
parents d74fbf56f2f6
children c9b51268668f
rev   line source
955
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1 /*
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2 SDL - Simple DirectMedia Layer
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3 Copyright (C) 1997-2004 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
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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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 /* RISC OS implementations uses pthreads based on linux code */
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24
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25 #ifdef SAVE_RCSID
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26 static char rcsid =
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27 "@(#) $Id$";
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28 #endif
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29
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30 #ifdef DISABLE_THREADS
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31 #include "../generic/SDL_syscond.c"
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32 #else
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33 #include <sys/time.h>
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34 #include <unistd.h>
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35 #include <errno.h>
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36 #include <stdlib.h>
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37 #include <pthread.h>
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38
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39 #include "SDL_error.h"
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40 #include "SDL_thread.h"
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41 #include "SDL_sysmutex_c.h"
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42
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43 struct SDL_cond
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44 {
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45 pthread_cond_t cond;
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46 };
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47
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48 /* Create a condition variable */
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49 SDL_cond * SDL_CreateCond(void)
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50 {
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51 SDL_cond *cond;
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52
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53 cond = (SDL_cond *) malloc(sizeof(SDL_cond));
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54 if ( cond ) {
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55 if ( pthread_cond_init(&cond->cond, NULL) < 0 ) {
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56 SDL_SetError("pthread_cond_init() failed");
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57 free(cond);
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58 cond = NULL;
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59 }
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60 }
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61 return(cond);
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62 }
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63
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64 /* Destroy a condition variable */
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65 void SDL_DestroyCond(SDL_cond *cond)
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66 {
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67 if ( cond ) {
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68 pthread_cond_destroy(&cond->cond);
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69 free(cond);
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70 }
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71 }
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72
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73 /* Restart one of the threads that are waiting on the condition variable */
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74 int SDL_CondSignal(SDL_cond *cond)
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75 {
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76 int retval;
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77
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78 if ( ! cond ) {
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79 SDL_SetError("Passed a NULL condition variable");
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80 return -1;
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81 }
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82
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83 retval = 0;
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84 if ( pthread_cond_signal(&cond->cond) != 0 ) {
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85 SDL_SetError("pthread_cond_signal() failed");
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86 retval = -1;
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87 }
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88 return retval;
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89 }
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90
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91 /* Restart all threads that are waiting on the condition variable */
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92 int SDL_CondBroadcast(SDL_cond *cond)
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93 {
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94 int retval;
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95
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96 if ( ! cond ) {
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97 SDL_SetError("Passed a NULL condition variable");
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98 return -1;
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99 }
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100
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101 retval = 0;
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102 if ( pthread_cond_broadcast(&cond->cond) != 0 ) {
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103 SDL_SetError("pthread_cond_broadcast() failed");
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104 retval = -1;
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105 }
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106 return retval;
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107 }
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108
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109 int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms)
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110 {
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111 int retval;
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112 struct timeval delta;
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113 struct timespec abstime;
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114
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115 if ( ! cond ) {
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116 SDL_SetError("Passed a NULL condition variable");
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117 return -1;
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118 }
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119
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120 gettimeofday(&delta, NULL);
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121
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122 abstime.tv_sec = delta.tv_sec + (ms/1000);
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123 abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000;
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124 if ( abstime.tv_nsec > 1000000000 ) {
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125 abstime.tv_sec += 1;
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126 abstime.tv_nsec -= 1000000000;
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127 }
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128
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129 tryagain:
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130 retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
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131 switch (retval) {
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132 case EINTR:
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parents:
diff changeset
133 goto tryagain;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
134 break;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
135 case ETIMEDOUT:
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
136 retval = SDL_MUTEX_TIMEDOUT;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
137 break;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
138 case 0:
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
139 break;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 default:
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141 SDL_SetError("pthread_cond_timedwait() failed");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
142 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
143 break;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
145 return retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
146 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
147
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
148 /* Wait on the condition variable, unlocking the provided mutex.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
149 The mutex must be locked before entering this function!
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
150 */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
151 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
152 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
153 int retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
155 if ( ! cond ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
156 SDL_SetError("Passed a NULL condition variable");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
157 return -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
158 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
159
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
160 retval = 0;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
161 if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162 SDL_SetError("pthread_cond_wait() failed");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
163 retval = -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
164 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
165 return retval;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
166 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
167 #endif