diff options
Diffstat (limited to 'apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c')
-rw-r--r-- | apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c | 153 |
1 files changed, 0 insertions, 153 deletions
diff --git a/apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c b/apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c deleted file mode 100644 index e9ac139b36..0000000000 --- a/apps/plugins/sdl/src/thread/riscos/SDL_sysmutex.c +++ /dev/null | |||
@@ -1,153 +0,0 @@ | |||
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 | #include "SDL_thread.h" | ||
27 | |||
28 | #if SDL_THREADS_DISABLED | ||
29 | #include "../generic/SDL_sysmutex.c" | ||
30 | #else | ||
31 | |||
32 | #include <pthread.h> | ||
33 | |||
34 | struct SDL_mutex { | ||
35 | pthread_mutex_t id; | ||
36 | #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX | ||
37 | int recursive; | ||
38 | pthread_t owner; | ||
39 | #endif | ||
40 | }; | ||
41 | |||
42 | SDL_mutex *SDL_CreateMutex (void) | ||
43 | { | ||
44 | SDL_mutex *mutex; | ||
45 | pthread_mutexattr_t attr; | ||
46 | |||
47 | /* Allocate the structure */ | ||
48 | mutex = (SDL_mutex *)SDL_calloc(1, sizeof(*mutex)); | ||
49 | if ( mutex ) { | ||
50 | pthread_mutexattr_init(&attr); | ||
51 | #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX | ||
52 | /* No extra attributes necessary */ | ||
53 | #else | ||
54 | pthread_mutexattr_settype(&attr, PTHREAD_MUTEX_RECURSIVE); | ||
55 | #endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */ | ||
56 | if ( pthread_mutex_init(&mutex->id, &attr) != 0 ) { | ||
57 | SDL_SetError("pthread_mutex_init() failed"); | ||
58 | SDL_free(mutex); | ||
59 | mutex = NULL; | ||
60 | } | ||
61 | } else { | ||
62 | SDL_OutOfMemory(); | ||
63 | } | ||
64 | return(mutex); | ||
65 | } | ||
66 | |||
67 | void SDL_DestroyMutex(SDL_mutex *mutex) | ||
68 | { | ||
69 | if ( mutex ) { | ||
70 | pthread_mutex_destroy(&mutex->id); | ||
71 | SDL_free(mutex); | ||
72 | } | ||
73 | } | ||
74 | |||
75 | /* Lock the mutex */ | ||
76 | int SDL_mutexP(SDL_mutex *mutex) | ||
77 | { | ||
78 | int retval; | ||
79 | #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX | ||
80 | pthread_t this_thread; | ||
81 | #endif | ||
82 | |||
83 | if ( mutex == NULL ) { | ||
84 | SDL_SetError("Passed a NULL mutex"); | ||
85 | return -1; | ||
86 | } | ||
87 | |||
88 | retval = 0; | ||
89 | #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX | ||
90 | this_thread = pthread_self(); | ||
91 | if ( mutex->owner == this_thread ) { | ||
92 | ++mutex->recursive; | ||
93 | } else { | ||
94 | /* The order of operations is important. | ||
95 | We set the locking thread id after we obtain the lock | ||
96 | so unlocks from other threads will fail. | ||
97 | */ | ||
98 | if ( pthread_mutex_lock(&mutex->id) == 0 ) { | ||
99 | mutex->owner = this_thread; | ||
100 | mutex->recursive = 0; | ||
101 | } else { | ||
102 | SDL_SetError("pthread_mutex_lock() failed"); | ||
103 | retval = -1; | ||
104 | } | ||
105 | } | ||
106 | #else | ||
107 | if ( pthread_mutex_lock(&mutex->id) < 0 ) { | ||
108 | SDL_SetError("pthread_mutex_lock() failed"); | ||
109 | retval = -1; | ||
110 | } | ||
111 | #endif | ||
112 | return retval; | ||
113 | } | ||
114 | |||
115 | int SDL_mutexV(SDL_mutex *mutex) | ||
116 | { | ||
117 | int retval; | ||
118 | |||
119 | if ( mutex == NULL ) { | ||
120 | SDL_SetError("Passed a NULL mutex"); | ||
121 | return -1; | ||
122 | } | ||
123 | |||
124 | retval = 0; | ||
125 | #if SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX | ||
126 | /* We can only unlock the mutex if we own it */ | ||
127 | if ( pthread_self() == mutex->owner ) { | ||
128 | if ( mutex->recursive ) { | ||
129 | --mutex->recursive; | ||
130 | } else { | ||
131 | /* The order of operations is important. | ||
132 | First reset the owner so another thread doesn't lock | ||
133 | the mutex and set the ownership before we reset it, | ||
134 | then release the lock semaphore. | ||
135 | */ | ||
136 | mutex->owner = 0; | ||
137 | pthread_mutex_unlock(&mutex->id); | ||
138 | } | ||
139 | } else { | ||
140 | SDL_SetError("mutex not owned by this thread"); | ||
141 | retval = -1; | ||
142 | } | ||
143 | |||
144 | #else | ||
145 | if ( pthread_mutex_unlock(&mutex->id) < 0 ) { | ||
146 | SDL_SetError("pthread_mutex_unlock() failed"); | ||
147 | retval = -1; | ||
148 | } | ||
149 | #endif /* SDL_THREAD_PTHREAD_NO_RECURSIVE_MUTEX */ | ||
150 | |||
151 | return retval; | ||
152 | } | ||
153 | #endif | ||