e14743d1 |
1 | /* |
2 | SDL - Simple DirectMedia Layer |
3 | Copyright (C) 1997-2009 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 version based on pthreads linux source */ |
25 | |
26 | #include "SDL_thread.h" |
27 | #include "../SDL_systhread.h" |
28 | |
29 | #if SDL_THREADS_DISABLED |
30 | |
31 | int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
32 | { |
33 | SDL_SetError("Threads have not been compiled into this version of the library"); |
34 | return(-1); |
35 | } |
36 | |
37 | void SDL_SYS_SetupThread(void) |
38 | { |
39 | return; |
40 | } |
41 | |
42 | Uint32 SDL_ThreadID(void) |
43 | { |
44 | return(0); |
45 | } |
46 | |
47 | void SDL_SYS_WaitThread(SDL_Thread *thread) |
48 | { |
49 | return; |
50 | } |
51 | |
52 | void SDL_SYS_KillThread(SDL_Thread *thread) |
53 | { |
54 | return; |
55 | } |
56 | |
57 | #else |
58 | |
59 | #include <signal.h> |
60 | |
61 | /* List of signals to mask in the subthreads */ |
62 | static int sig_list[] = { |
63 | SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, |
64 | SIGVTALRM, SIGPROF, 0 |
65 | }; |
66 | |
67 | #include <pthread.h> |
68 | |
69 | int riscos_using_threads = 0; |
70 | Uint32 riscos_main_thread = 0; /* Thread running events */ |
71 | |
72 | static void *RunThread(void *data) |
73 | { |
74 | SDL_RunThread(data); |
75 | pthread_exit((void*)0); |
76 | return((void *)0); /* Prevent compiler warning */ |
77 | } |
78 | |
79 | int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
80 | { |
81 | pthread_attr_t type; |
82 | |
83 | /* Set the thread attributes */ |
84 | if ( pthread_attr_init(&type) != 0 ) { |
85 | SDL_SetError("Couldn't initialize pthread attributes"); |
86 | return(-1); |
87 | } |
88 | pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE); |
89 | |
90 | /* Create the thread and go! */ |
91 | if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) { |
92 | SDL_SetError("Not enough resources to create thread"); |
93 | return(-1); |
94 | } |
95 | |
96 | if (riscos_using_threads == 0) |
97 | { |
98 | riscos_using_threads = 1; |
99 | riscos_main_thread = SDL_ThreadID(); |
100 | } |
101 | |
102 | return(0); |
103 | } |
104 | |
105 | void SDL_SYS_SetupThread(void) |
106 | { |
107 | int i; |
108 | sigset_t mask; |
109 | |
110 | /* Mask asynchronous signals for this thread */ |
111 | sigemptyset(&mask); |
112 | for ( i=0; sig_list[i]; ++i ) { |
113 | sigaddset(&mask, sig_list[i]); |
114 | } |
115 | pthread_sigmask(SIG_BLOCK, &mask, 0); |
116 | |
117 | #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
118 | /* Allow ourselves to be asynchronously cancelled */ |
119 | { int oldstate; |
120 | pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate); |
121 | } |
122 | #endif |
123 | } |
124 | |
125 | Uint32 SDL_ThreadID(void) |
126 | { |
127 | return((Uint32)pthread_self()); |
128 | } |
129 | |
130 | void SDL_SYS_WaitThread(SDL_Thread *thread) |
131 | { |
132 | pthread_join(thread->handle, 0); |
133 | } |
134 | |
135 | void SDL_SYS_KillThread(SDL_Thread *thread) |
136 | { |
137 | #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
138 | pthread_cancel(thread->handle); |
139 | #else |
140 | pthread_kill(thread->handle, SIGKILL); |
141 | #endif |
142 | } |
143 | |
144 | #endif |