| 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 | /* |
| 25 | * GNU pth threads |
| 26 | * |
| 27 | * Patrice Mandin |
| 28 | */ |
| 29 | |
| 30 | #include <pth.h> |
| 31 | #include <signal.h> |
| 32 | |
| 33 | #include "SDL_thread.h" |
| 34 | #include "../SDL_thread_c.h" |
| 35 | #include "../SDL_systhread.h" |
| 36 | |
| 37 | /* List of signals to mask in the subthreads */ |
| 38 | static int sig_list[] = { |
| 39 | SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, |
| 40 | SIGVTALRM, SIGPROF, 0 |
| 41 | }; |
| 42 | |
| 43 | static void *RunThread(void *data) |
| 44 | { |
| 45 | SDL_RunThread(data); |
| 46 | pth_exit((void*)0); |
| 47 | return((void *)0); /* Prevent compiler warning */ |
| 48 | } |
| 49 | |
| 50 | int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) |
| 51 | { |
| 52 | pth_attr_t type; |
| 53 | |
| 54 | /* Create a new attribute */ |
| 55 | type = pth_attr_new(); |
| 56 | if ( type == NULL ) { |
| 57 | SDL_SetError("Couldn't initialize pth attributes"); |
| 58 | return(-1); |
| 59 | } |
| 60 | pth_attr_set(type, PTH_ATTR_JOINABLE, TRUE); |
| 61 | |
| 62 | /* Create the thread and go! */ |
| 63 | thread->handle = pth_spawn(type, RunThread, args); |
| 64 | if ( thread->handle == NULL ) { |
| 65 | SDL_SetError("Not enough resources to create thread"); |
| 66 | return(-1); |
| 67 | } |
| 68 | return(0); |
| 69 | } |
| 70 | |
| 71 | void SDL_SYS_SetupThread(void) |
| 72 | { |
| 73 | int i; |
| 74 | sigset_t mask; |
| 75 | int oldstate; |
| 76 | |
| 77 | /* Mask asynchronous signals for this thread */ |
| 78 | sigemptyset(&mask); |
| 79 | for ( i=0; sig_list[i]; ++i ) { |
| 80 | sigaddset(&mask, sig_list[i]); |
| 81 | } |
| 82 | pth_sigmask(SIG_BLOCK, &mask, 0); |
| 83 | |
| 84 | /* Allow ourselves to be asynchronously cancelled */ |
| 85 | pth_cancel_state(PTH_CANCEL_ASYNCHRONOUS, &oldstate); |
| 86 | } |
| 87 | |
| 88 | /* WARNING: This may not work for systems with 64-bit pid_t */ |
| 89 | Uint32 SDL_ThreadID(void) |
| 90 | { |
| 91 | return((Uint32)pth_self()); |
| 92 | } |
| 93 | |
| 94 | void SDL_SYS_WaitThread(SDL_Thread *thread) |
| 95 | { |
| 96 | pth_join(thread->handle, NULL); |
| 97 | } |
| 98 | |
| 99 | void SDL_SYS_KillThread(SDL_Thread *thread) |
| 100 | { |
| 101 | pth_cancel(thread->handle); |
| 102 | pth_join(thread->handle, NULL); |
| 103 | } |