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 | #include <pthread.h> |
25 | #include <signal.h> |
26 | |
27 | #include "SDL_thread.h" |
28 | #include "../SDL_thread_c.h" |
29 | #include "../SDL_systhread.h" |
30 | |
31 | /* List of signals to mask in the subthreads */ |
32 | static int sig_list[] = { |
33 | SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, |
34 | SIGVTALRM, SIGPROF, 0 |
35 | }; |
36 | |
37 | #ifdef __RISCOS__ |
38 | /* RISC OS needs to know the main thread for |
39 | * it's timer and event processing. */ |
40 | int riscos_using_threads = 0; |
41 | Uint32 riscos_main_thread = 0; /* Thread running events */ |
42 | #endif |
43 | |
44 | |
45 | static void *RunThread(void *data) |
46 | { |
47 | SDL_RunThread(data); |
48 | pthread_exit((void*)0); |
49 | return((void *)0); /* Prevent compiler warning */ |
50 | } |
51 | |
52 | int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
53 | { |
54 | pthread_attr_t type; |
55 | |
56 | /* Set the thread attributes */ |
57 | if ( pthread_attr_init(&type) != 0 ) { |
58 | SDL_SetError("Couldn't initialize pthread attributes"); |
59 | return(-1); |
60 | } |
61 | pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE); |
62 | |
63 | /* Create the thread and go! */ |
64 | if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) { |
65 | SDL_SetError("Not enough resources to create thread"); |
66 | return(-1); |
67 | } |
68 | |
69 | #ifdef __RISCOS__ |
70 | if (riscos_using_threads == 0) { |
71 | riscos_using_threads = 1; |
72 | riscos_main_thread = SDL_ThreadID(); |
73 | } |
74 | #endif |
75 | |
76 | return(0); |
77 | } |
78 | |
79 | void SDL_SYS_SetupThread(void) |
80 | { |
81 | int i; |
82 | sigset_t mask; |
83 | |
84 | /* Mask asynchronous signals for this thread */ |
85 | sigemptyset(&mask); |
86 | for ( i=0; sig_list[i]; ++i ) { |
87 | sigaddset(&mask, sig_list[i]); |
88 | } |
89 | pthread_sigmask(SIG_BLOCK, &mask, 0); |
90 | |
91 | #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
92 | /* Allow ourselves to be asynchronously cancelled */ |
93 | { int oldstate; |
94 | pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate); |
95 | } |
96 | #endif |
97 | } |
98 | |
99 | /* WARNING: This may not work for systems with 64-bit pid_t */ |
100 | Uint32 SDL_ThreadID(void) |
101 | { |
102 | return((Uint32)((size_t)pthread_self())); |
103 | } |
104 | |
105 | void SDL_SYS_WaitThread(SDL_Thread *thread) |
106 | { |
107 | pthread_join(thread->handle, 0); |
108 | } |
109 | |
110 | void SDL_SYS_KillThread(SDL_Thread *thread) |
111 | { |
112 | #ifdef PTHREAD_CANCEL_ASYNCHRONOUS |
113 | pthread_cancel(thread->handle); |
114 | #else |
115 | #ifdef __FREEBSD__ |
116 | #warning For some reason, this doesnt actually kill a thread - FreeBSD 3.2 |
117 | #endif |
118 | pthread_kill(thread->handle, SIGKILL); |
119 | #endif |
120 | } |