1/* 2 SDL - Simple DirectMedia Layer 3 Copyright (C) 1997-2006 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 */ 32static 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. */ 40int riscos_using_threads = 0; 41Uint32 riscos_main_thread = 0; /* Thread running events */ 42#endif 43 44 45static void *RunThread(void *data) 46{ 47 SDL_RunThread(data); 48 pthread_exit((void*)0); 49 return((void *)0); /* Prevent compiler warning */ 50} 51 52int 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 79void 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 */ 100Uint32 SDL_ThreadID(void) 101{ 102 return((Uint32)pthread_self()); 103} 104 105void SDL_SYS_WaitThread(SDL_Thread *thread) 106{ 107 pthread_join(thread->handle, 0); 108} 109 110void 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} 121