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annotate src/thread/riscos/SDL_syscond.c @ 1066:671bbd773c8a

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author Patrice Mandin <patmandin@gmail.com>
date Thu, 02 Jun 2005 22:02:18 +0000
parents d74fbf56f2f6
children c9b51268668f
rev   line source
955
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
parents:
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1 /*
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Sam Lantinga <slouken@libsdl.org>
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2 SDL - Simple DirectMedia Layer
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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3 Copyright (C) 1997-2004 Sam Lantinga
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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4
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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5 This library is free software; you can redistribute it and/or
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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6 modify it under the terms of the GNU Library General Public
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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7 License as published by the Free Software Foundation; either
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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8 version 2 of the License, or (at your option) any later version.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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9
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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10 This library is distributed in the hope that it will be useful,
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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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
Sam Lantinga <slouken@libsdl.org>
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13 Library General Public License for more details.
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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14
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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15 You should have received a copy of the GNU Library General Public
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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16 License along with this library; if not, write to the Free
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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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
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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20 slouken@libsdl.org
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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21 */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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22
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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23 /* RISC OS implementations uses pthreads based on linux code */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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24
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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25 #ifdef SAVE_RCSID
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26 static char rcsid =
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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27 "@(#) $Id$";
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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28 #endif
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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29
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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30 #ifdef DISABLE_THREADS
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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31 #include "../generic/SDL_syscond.c"
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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32 #else
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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33 #include <sys/time.h>
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34 #include <unistd.h>
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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35 #include <errno.h>
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36 #include <stdlib.h>
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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37 #include <pthread.h>
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38
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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39 #include "SDL_error.h"
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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40 #include "SDL_thread.h"
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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41 #include "SDL_sysmutex_c.h"
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42
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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43 struct SDL_cond
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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44 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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45 pthread_cond_t cond;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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46 };
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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47
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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48 /* Create a condition variable */
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49 SDL_cond * SDL_CreateCond(void)
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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50 {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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51 SDL_cond *cond;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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52
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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53 cond = (SDL_cond *) malloc(sizeof(SDL_cond));
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54 if ( cond ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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55 if ( pthread_cond_init(&cond->cond, NULL) < 0 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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56 SDL_SetError("pthread_cond_init() failed");
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57 free(cond);
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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58 cond = NULL;
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59 }
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Sam Lantinga <slouken@libsdl.org>
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60 }
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Sam Lantinga <slouken@libsdl.org>
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61 return(cond);
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62 }
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63
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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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 */
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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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 ) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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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;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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112 struct timeval delta;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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113 struct timespec abstime;
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Sam Lantinga <slouken@libsdl.org>
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114
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115 if ( ! cond ) {
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116 SDL_SetError("Passed a NULL condition variable");
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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117 return -1;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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118 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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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 }
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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128
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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129 tryagain:
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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130 retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
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131 switch (retval) {
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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132 case EINTR:
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
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133 goto tryagain;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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134 break;
d74fbf56f2f6 Date: Fri, 25 Jun 2004 13:29:15 +0100
Sam Lantinga <slouken@libsdl.org>
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135 case ETIMEDOUT:
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Sam Lantinga <slouken@libsdl.org>
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136 retval = SDL_MUTEX_TIMEDOUT;
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137 break;
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138 case 0:
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139 break;
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140 default:
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141 SDL_SetError("pthread_cond_timedwait() failed");
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142 retval = -1;
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143 break;
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144 }
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145 return retval;
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146 }
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147
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148 /* Wait on the condition variable, unlocking the provided mutex.
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149 The mutex must be locked before entering this function!
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150 */
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151 int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex)
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152 {
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153 int retval;
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154
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155 if ( ! cond ) {
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156 SDL_SetError("Passed a NULL condition variable");
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157 return -1;
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158 }
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159
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160 retval = 0;
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161 if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) {
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diff changeset
162 SDL_SetError("pthread_cond_wait() failed");
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163 retval = -1;
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164 }
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165 return retval;
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166 }
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167 #endif