Mercurial > sdl-ios-xcode

annotate src/thread/pthread/SDL_syscond.c @ 5172:ededa1ccf91c

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Switched the SDL 1.2 compatibility to use the window surface, so it's fast even when there's no hardware acceleration available. This means that the YUV overlay now uses software, but that's okay since fast YUV code should be using the textures now anyway.
author Sam Lantinga <slouken@libsdl.org>
date Thu, 03 Feb 2011 21:13:55 -0800
parents f7b03b6838cb
children b530ef003506
rev   line source
1361
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1 /*
19418e4422cb New configure-based build system. Still work in progress, but much improved
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2 SDL - Simple DirectMedia Layer
3697
f7b03b6838cb Fixed bug #926
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3 Copyright (C) 1997-2010 Sam Lantinga
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4
19418e4422cb New configure-based build system. Still work in progress, but much improved
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5 This library is free software; you can redistribute it and/or
19418e4422cb New configure-based build system. Still work in progress, but much improved
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6 modify it under the terms of the GNU Lesser General Public
19418e4422cb New configure-based build system. Still work in progress, but much improved
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7 License as published by the Free Software Foundation; either
19418e4422cb New configure-based build system. Still work in progress, but much improved
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8 version 2.1 of the License, or (at your option) any later version.
19418e4422cb New configure-based build system. Still work in progress, but much improved
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9
19418e4422cb New configure-based build system. Still work in progress, but much improved
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10 This library is distributed in the hope that it will be useful,
19418e4422cb New configure-based build system. Still work in progress, but much improved
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11 but WITHOUT ANY WARRANTY; without even the implied warranty of
19418e4422cb New configure-based build system. Still work in progress, but much improved
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12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
19418e4422cb New configure-based build system. Still work in progress, but much improved
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13 Lesser General Public License for more details.
19418e4422cb New configure-based build system. Still work in progress, but much improved
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14
19418e4422cb New configure-based build system. Still work in progress, but much improved
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15 You should have received a copy of the GNU Lesser General Public
19418e4422cb New configure-based build system. Still work in progress, but much improved
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16 License along with this library; if not, write to the Free Software
19418e4422cb New configure-based build system. Still work in progress, but much improved
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17 Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
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18
19418e4422cb New configure-based build system. Still work in progress, but much improved
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19 Sam Lantinga
19418e4422cb New configure-based build system. Still work in progress, but much improved
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20 slouken@libsdl.org
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21 */
1402
d910939febfa Use consistent identifiers for the various platforms we support.
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22 #include "SDL_config.h"
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23
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24 #include <sys/time.h>
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25 #include <unistd.h>
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26 #include <errno.h>
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27 #include <pthread.h>
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28
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29 #include "SDL_thread.h"
19418e4422cb New configure-based build system. Still work in progress, but much improved
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30 #include "SDL_sysmutex_c.h"
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31
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32 struct SDL_cond
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33 {
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c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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34 pthread_cond_t cond;
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35 };
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36
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37 /* Create a condition variable */
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38 SDL_cond *
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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39 SDL_CreateCond(void)
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40 {
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41 SDL_cond *cond;
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42
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43 cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond));
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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44 if (cond) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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45 if (pthread_cond_init(&cond->cond, NULL) < 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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46 SDL_SetError("pthread_cond_init() failed");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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47 SDL_free(cond);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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48 cond = NULL;
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49 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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50 }
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51 return (cond);
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52 }
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53
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54 /* Destroy a condition variable */
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55 void
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56 SDL_DestroyCond(SDL_cond * cond)
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57 {
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58 if (cond) {
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59 pthread_cond_destroy(&cond->cond);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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60 SDL_free(cond);
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61 }
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62 }
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63
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64 /* Restart one of the threads that are waiting on the condition variable */
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65 int
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66 SDL_CondSignal(SDL_cond * cond)
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67 {
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68 int retval;
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69
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70 if (!cond) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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71 SDL_SetError("Passed a NULL condition variable");
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72 return -1;
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73 }
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74
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75 retval = 0;
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76 if (pthread_cond_signal(&cond->cond) != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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77 SDL_SetError("pthread_cond_signal() failed");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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78 retval = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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79 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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80 return retval;
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81 }
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82
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83 /* Restart all threads that are waiting on the condition variable */
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84 int
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85 SDL_CondBroadcast(SDL_cond * cond)
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86 {
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87 int retval;
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88
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89 if (!cond) {
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90 SDL_SetError("Passed a NULL condition variable");
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91 return -1;
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92 }
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93
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94 retval = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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95 if (pthread_cond_broadcast(&cond->cond) != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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96 SDL_SetError("pthread_cond_broadcast() failed");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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97 retval = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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98 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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99 return retval;
1361
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100 }
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101
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102 int
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103 SDL_CondWaitTimeout(SDL_cond * cond, SDL_mutex * mutex, Uint32 ms)
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104 {
1895
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105 int retval;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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106 struct timeval delta;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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107 struct timespec abstime;
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108
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109 if (!cond) {
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110 SDL_SetError("Passed a NULL condition variable");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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111 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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112 }
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113
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114 gettimeofday(&delta, NULL);
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115
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116 abstime.tv_sec = delta.tv_sec + (ms / 1000);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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117 abstime.tv_nsec = (delta.tv_usec + (ms % 1000) * 1000) * 1000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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118 if (abstime.tv_nsec > 1000000000) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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119 abstime.tv_sec += 1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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120 abstime.tv_nsec -= 1000000000;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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parents: 1402
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121 }
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122
19418e4422cb New configure-based build system. Still work in progress, but much improved
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123 tryagain:
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124 retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime);
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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125 switch (retval) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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126 case EINTR:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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127 goto tryagain;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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128 break;
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diff changeset
129 case ETIMEDOUT:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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130 retval = SDL_MUTEX_TIMEDOUT;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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131 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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132 case 0:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
133 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
134 default:
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
135 SDL_SetError("pthread_cond_timedwait() failed");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
136 retval = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
137 break;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
138 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
139 return retval;
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
140 }
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
141
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
142 /* Wait on the condition variable, unlocking the provided mutex.
19418e4422cb New configure-based build system. Still work in progress, but much improved
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parents:
diff changeset
143 The mutex must be locked before entering this function!
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
144 */
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
145 int
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
146 SDL_CondWait(SDL_cond * cond, SDL_mutex * mutex)
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
147 {
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
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diff changeset
148 int retval;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
149
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
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diff changeset
150 if (!cond) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
151 SDL_SetError("Passed a NULL condition variable");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
152 return -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
153 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
154
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
155 retval = 0;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
156 if (pthread_cond_wait(&cond->cond, &mutex->id) != 0) {
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
157 SDL_SetError("pthread_cond_wait() failed");
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
158 retval = -1;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
159 }
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
160 return retval;
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
161 }
1361
19418e4422cb New configure-based build system. Still work in progress, but much improved
Sam Lantinga <slouken@libsdl.org>
parents:
diff changeset
162
1895
c121d94672cb SDL 1.2 is moving to a branch, and SDL 1.3 is becoming the head.
Sam Lantinga <slouken@libsdl.org>
parents: 1402
diff changeset
163 /* vi: set ts=4 sw=4 expandtab: */