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author | Franklin Wei <git@fwei.tk> | 2017-01-21 15:18:31 -0500 |
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committer | Franklin Wei <git@fwei.tk> | 2017-12-23 21:01:26 -0500 |
commit | a855d6202536ff28e5aae4f22a0f31d8f5b325d0 (patch) | |
tree | 8c75f224dd64ed360505afa8843d016b0d75000b /apps/plugins/sdl/src/thread/pth/SDL_syscond.c | |
parent | 01c6dcf6c7b9bb1ad2fa0450f99bacc5f3d3e04b (diff) | |
download | rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.tar.gz rockbox-a855d6202536ff28e5aae4f22a0f31d8f5b325d0.zip |
Port of Duke Nukem 3D
This ports Fabien Sanglard's Chocolate Duke to run on a version of SDL
for Rockbox.
Change-Id: I8f2c4c78af19de10c1633ed7bb7a997b43256dd9
Diffstat (limited to 'apps/plugins/sdl/src/thread/pth/SDL_syscond.c')
-rw-r--r-- | apps/plugins/sdl/src/thread/pth/SDL_syscond.c | 164 |
1 files changed, 164 insertions, 0 deletions
diff --git a/apps/plugins/sdl/src/thread/pth/SDL_syscond.c b/apps/plugins/sdl/src/thread/pth/SDL_syscond.c new file mode 100644 index 0000000000..ede74aaeae --- /dev/null +++ b/apps/plugins/sdl/src/thread/pth/SDL_syscond.c | |||
@@ -0,0 +1,164 @@ | |||
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 | /* | ||
25 | * GNU pth conditions variables | ||
26 | * | ||
27 | * Patrice Mandin | ||
28 | */ | ||
29 | |||
30 | #include <pth.h> | ||
31 | |||
32 | #include "SDL_thread.h" | ||
33 | #include "SDL_sysmutex_c.h" | ||
34 | |||
35 | struct SDL_cond | ||
36 | { | ||
37 | pth_cond_t condpth_p; | ||
38 | }; | ||
39 | |||
40 | /* Create a condition variable */ | ||
41 | SDL_cond * SDL_CreateCond(void) | ||
42 | { | ||
43 | SDL_cond *cond; | ||
44 | |||
45 | cond = (SDL_cond *) SDL_malloc(sizeof(SDL_cond)); | ||
46 | if ( cond ) { | ||
47 | if ( pth_cond_init(&(cond->condpth_p)) < 0 ) { | ||
48 | SDL_SetError("pthread_cond_init() failed"); | ||
49 | SDL_free(cond); | ||
50 | cond = NULL; | ||
51 | } | ||
52 | } else { | ||
53 | SDL_OutOfMemory(); | ||
54 | } | ||
55 | return(cond); | ||
56 | } | ||
57 | |||
58 | /* Destroy a condition variable */ | ||
59 | void SDL_DestroyCond(SDL_cond *cond) | ||
60 | { | ||
61 | if ( 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 ( pth_cond_notify(&(cond->condpth_p), FALSE) != 0 ) { | ||
78 | SDL_SetError("pth_cond_notify() 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 ( pth_cond_notify(&(cond->condpth_p), TRUE) != 0 ) { | ||
96 | SDL_SetError("pth_cond_notify() failed"); | ||
97 | retval = -1; | ||
98 | } | ||
99 | return retval; | ||
100 | } | ||
101 | |||
102 | /* Wait on the condition variable for at most 'ms' milliseconds. | ||
103 | The mutex must be locked before entering this function! | ||
104 | The mutex is unlocked during the wait, and locked again after the wait. | ||
105 | |||
106 | Typical use: | ||
107 | |||
108 | Thread A: | ||
109 | SDL_LockMutex(lock); | ||
110 | while ( ! condition ) { | ||
111 | SDL_CondWait(cond); | ||
112 | } | ||
113 | SDL_UnlockMutex(lock); | ||
114 | |||
115 | Thread B: | ||
116 | SDL_LockMutex(lock); | ||
117 | ... | ||
118 | condition = true; | ||
119 | ... | ||
120 | SDL_UnlockMutex(lock); | ||
121 | */ | ||
122 | int SDL_CondWaitTimeout(SDL_cond *cond, SDL_mutex *mutex, Uint32 ms) | ||
123 | { | ||
124 | int retval; | ||
125 | pth_event_t ev; | ||
126 | int sec; | ||
127 | |||
128 | if ( ! cond ) { | ||
129 | SDL_SetError("Passed a NULL condition variable"); | ||
130 | return -1; | ||
131 | } | ||
132 | |||
133 | retval = 0; | ||
134 | |||
135 | sec = ms/1000; | ||
136 | ev = pth_event(PTH_EVENT_TIME, pth_timeout(sec,(ms-sec*1000)*1000)); | ||
137 | |||
138 | if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), ev) != 0 ) { | ||
139 | SDL_SetError("pth_cond_await() failed"); | ||
140 | retval = -1; | ||
141 | } | ||
142 | |||
143 | pth_event_free(ev, PTH_FREE_ALL); | ||
144 | |||
145 | return retval; | ||
146 | } | ||
147 | |||
148 | /* Wait on the condition variable forever */ | ||
149 | int SDL_CondWait(SDL_cond *cond, SDL_mutex *mutex) | ||
150 | { | ||
151 | int retval; | ||
152 | |||
153 | if ( ! cond ) { | ||
154 | SDL_SetError("Passed a NULL condition variable"); | ||
155 | return -1; | ||
156 | } | ||
157 | |||
158 | retval = 0; | ||
159 | if ( pth_cond_await(&(cond->condpth_p), &(mutex->mutexpth_p), NULL) != 0 ) { | ||
160 | SDL_SetError("pth_cond_await() failed"); | ||
161 | retval = -1; | ||
162 | } | ||
163 | return retval; | ||
164 | } | ||