diff options
Diffstat (limited to 'apps/plugins/sdl/src/thread/riscos/SDL_syscond.c')
-rw-r--r-- | apps/plugins/sdl/src/thread/riscos/SDL_syscond.c | 160 |
1 files changed, 160 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/thread/riscos/SDL_syscond.c b/apps/plugins/sdl/src/thread/riscos/SDL_syscond.c new file mode 100644 index 0000000000..ee5566647f --- /dev/null +++ b/apps/plugins/sdl/src/thread/riscos/SDL_syscond.c | |||
@@ -0,0 +1,160 @@ | |||
1 | /* | ||
2 | SDL - Simple DirectMedia Layer | ||
3 | Copyright (C) 1997-2012 Sam Lantinga | ||
4 | |||
5 | This library is free software; you can redistribute it and/or | ||
6 | modify it under the terms of the GNU Lesser General Public | ||
7 | License as published by the Free Software Foundation; either | ||
8 | version 2.1 of the License, or (at your option) any later version. | ||
9 | |||
10 | This library is distributed in the hope that it will be useful, | ||
11 | but WITHOUT ANY WARRANTY; without even the implied warranty of | ||
12 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | ||
13 | Lesser General Public License for more details. | ||
14 | |||
15 | You should have received a copy of the GNU Lesser General Public | ||
16 | License along with this library; if not, write to the Free Software | ||
17 | Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA | ||
18 | |||
19 | Sam Lantinga | ||
20 | slouken@libsdl.org | ||
21 | */ | ||
22 | #include "SDL_config.h" | ||
23 | |||
24 | /* RISC OS implementations uses pthreads based on linux code */ | ||
25 | |||
26 | #if SDL_THREADS_DISABLED | ||
27 | #include "../generic/SDL_syscond.c" | ||
28 | #else | ||
29 | #include <sys/time.h> | ||
30 | #include <unistd.h> | ||
31 | #include <pthread.h> | ||
32 | |||
33 | #include "SDL_thread.h" | ||
34 | #include "SDL_sysmutex_c.h" | ||
35 | |||
36 | struct SDL_cond | ||
37 | { | ||
38 | pthread_cond_t cond; | ||
39 | }; | ||
40 | |||
41 | /* Create a condition variable */ | ||
42 | SDL_cond * SDL_CreateCond(void) | ||
43 | { | ||
44 | SDL_cond *cond; | ||
45 | |||
46 | cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond)); | ||
47 | if ( cond ) { | ||
48 | if ( pthread_cond_init(&cond->cond, NULL) < 0 ) { | ||
49 | SDL_SetError("pthread_cond_init() failed"); | ||
50 | SDL_free(cond); | ||
51 | cond = NULL; | ||
52 | } | ||
53 | } | ||
54 | return(cond); | ||
55 | } | ||
56 | |||
57 | /* Destroy a condition variable */ | ||
58 | void SDL_DestroyCond(SDL_cond *cond) | ||
59 | { | ||
60 | if ( cond ) { | ||
61 | pthread_cond_destroy(&cond->cond); | ||
62 | SDL_free(cond); | ||
63 | } | ||
64 | } | ||
65 | |||
66 | /* Restart one of the threads that are waiting on the condition variable */ | ||
67 | int SDL_CondSignal(SDL_cond *cond) | ||
68 | { | ||
69 | int retval; | ||
70 | |||
71 | if ( ! cond ) { | ||
72 | SDL_SetError("Passed a NULL condition variable"); | ||
73 | return -1; | ||
74 | } | ||
75 | |||
76 | retval = 0; | ||
77 | if ( pthread_cond_signal(&cond->cond) != 0 ) { | ||
78 | SDL_SetError("pthread_cond_signal() failed"); | ||
79 | retval = -1; | ||
80 | } | ||
81 | return retval; | ||
82 | } | ||
83 | |||
84 | /* Restart all threads that are waiting on the condition variable */ | ||
85 | int SDL_CondBroadcast(SDL_cond *cond) | ||
86 | { | ||
87 | int retval; | ||
88 | |||
89 | if ( ! cond ) { | ||
90 | SDL_SetError("Passed a NULL condition variable"); | ||
91 | return -1; | ||
92 | } | ||
93 | |||
94 | retval = 0; | ||
95 | if ( pthread_cond_broadcast(&cond->cond) != 0 ) { | ||
96 | SDL_SetError("pthread_cond_broadcast() failed"); | ||
97 | retval = -1; | ||
98 | } | ||
99 | return retval; | ||
100 | } | ||
101 | |||
102 | int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) | ||
103 | { | ||
104 | int retval; | ||
105 | struct timeval delta; | ||
106 | struct timespec abstime; | ||
107 | |||
108 | if ( ! cond ) { | ||
109 | SDL_SetError("Passed a NULL condition variable"); | ||
110 | return -1; | ||
111 | } | ||
112 | |||
113 | gettimeofday(&delta, NULL); | ||
114 | |||
115 | abstime.tv_sec = delta.tv_sec + (ms/1000); | ||
116 | abstime.tv_nsec = (delta.tv_usec + (ms%1000) * 1000) * 1000; | ||
117 | if ( abstime.tv_nsec > 1000000000 ) { | ||
118 | abstime.tv_sec += 1; | ||
119 | abstime.tv_nsec -= 1000000000; | ||
120 | } | ||
121 | |||
122 | tryagain: | ||
123 | retval = pthread_cond_timedwait(&cond->cond, &mutex->id, &abstime); | ||
124 | switch (retval) { | ||
125 | case EINTR: | ||
126 | goto tryagain; | ||
127 | break; | ||
128 | case ETIMEDOUT: | ||
129 | retval = SDL_MUTEX_TIMEDOUT; | ||
130 | break; | ||
131 | case 0: | ||
132 | break; | ||
133 | default: | ||
134 | SDL_SetError("pthread_cond_timedwait() failed"); | ||
135 | retval = -1; | ||
136 | break; | ||
137 | } | ||
138 | return retval; | ||
139 | } | ||
140 | |||
141 | /* Wait on the condition variable, unlocking the provided mutex. | ||
142 | The mutex must be locked before entering this function! | ||
143 | */ | ||
144 | int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) | ||
145 | { | ||
146 | int retval; | ||
147 | |||
148 | if ( ! cond ) { | ||
149 | SDL_SetError("Passed a NULL condition variable"); | ||
150 | return -1; | ||
151 | } | ||
152 | |||
153 | retval = 0; | ||
154 | if ( pthread_cond_wait(&cond->cond, &mutex->id) != 0 ) { | ||
155 | SDL_SetError("pthread_cond_wait() failed"); | ||
156 | retval = -1; | ||
157 | } | ||
158 | return retval; | ||
159 | } | ||
160 | #endif | ||