Mercurial > sdl-ios-xcode
annotate src/thread/linux/SDL_systhread.c @ 1300:fd068ab116ee
Removed some old Mac OS X cruft.
Fixes Bugzilla #64.
--ryan.
| author | Ryan C. Gordon <icculus@icculus.org> |
|---|---|
| date | Mon, 30 Jan 2006 18:56:30 +0000 |
| parents | b8d311d90021 |
| children | c9b51268668f |
| rev | line source |
|---|---|
| 0 | 1 /* |
| 2 SDL - Simple DirectMedia Layer | |
|
769
b8d311d90021
Updated copyright information for 2004 (Happy New Year!)
Sam Lantinga <slouken@libsdl.org>
parents:
297
diff
changeset
|
3 Copyright (C) 1997-2004 Sam Lantinga |
| 0 | 4 |
| 5 This library is free software; you can redistribute it and/or | |
| 6 modify it under the terms of the GNU Library General Public | |
| 7 License as published by the Free Software Foundation; either | |
| 8 version 2 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 Library General Public License for more details. | |
| 14 | |
| 15 You should have received a copy of the GNU Library General Public | |
| 16 License along with this library; if not, write to the Free | |
| 17 Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
| 18 | |
| 19 Sam Lantinga | |
|
252
e8157fcb3114
Updated the source with the correct e-mail address
Sam Lantinga <slouken@libsdl.org>
parents:
0
diff
changeset
|
20 slouken@libsdl.org |
| 0 | 21 */ |
| 22 | |
| 23 #ifdef SAVE_RCSID | |
| 24 static char rcsid = | |
| 25 "@(#) $Id$"; | |
| 26 #endif | |
| 27 | |
| 28 /* Linux thread management routines for SDL */ | |
| 29 | |
| 30 #include "SDL_error.h" | |
| 31 #include "SDL_thread.h" | |
| 32 #include "SDL_systhread.h" | |
| 33 | |
| 34 #ifdef FORK_HACK | |
| 35 | |
| 36 #include <unistd.h> | |
| 37 | |
| 38 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) | |
| 39 { | |
| 40 SDL_SetError("Threads are not supported on this platform"); | |
| 41 return(-1); | |
| 42 } | |
| 43 void SDL_SYS_SetupThread(void) | |
| 44 { | |
| 45 return; | |
| 46 } | |
| 47 Uint32 SDL_ThreadID(void) | |
| 48 { | |
| 49 return((Uint32)getpid()); | |
| 50 } | |
| 51 void SDL_SYS_WaitThread(SDL_Thread *thread) | |
| 52 { | |
| 53 return; | |
| 54 } | |
| 55 void SDL_SYS_KillThread(SDL_Thread *thread) | |
| 56 { | |
| 57 return; | |
| 58 } | |
| 59 | |
| 60 #else | |
| 61 | |
| 62 #include <signal.h> | |
| 63 | |
| 64 /* List of signals to mask in the subthreads */ | |
| 65 static int sig_list[] = { | |
| 66 SIGHUP, SIGINT, SIGQUIT, SIGPIPE, SIGALRM, SIGTERM, SIGCHLD, SIGWINCH, | |
| 67 SIGVTALRM, SIGPROF, 0 | |
| 68 }; | |
| 69 | |
| 70 #ifdef SDL_USE_PTHREADS | |
| 71 | |
| 72 #include <pthread.h> | |
| 73 | |
| 74 | |
| 75 static void *RunThread(void *data) | |
| 76 { | |
| 77 SDL_RunThread(data); | |
| 78 pthread_exit((void*)0); | |
| 79 return((void *)0); /* Prevent compiler warning */ | |
| 80 } | |
| 81 | |
| 82 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) | |
| 83 { | |
| 84 pthread_attr_t type; | |
| 85 | |
| 86 /* Set the thread attributes */ | |
| 87 if ( pthread_attr_init(&type) != 0 ) { | |
| 88 SDL_SetError("Couldn't initialize pthread attributes"); | |
| 89 return(-1); | |
| 90 } | |
| 91 pthread_attr_setdetachstate(&type, PTHREAD_CREATE_JOINABLE); | |
| 92 | |
| 93 /* Create the thread and go! */ | |
| 94 if ( pthread_create(&thread->handle, &type, RunThread, args) != 0 ) { | |
| 95 SDL_SetError("Not enough resources to create thread"); | |
| 96 return(-1); | |
| 97 } | |
| 98 return(0); | |
| 99 } | |
| 100 | |
| 101 void SDL_SYS_SetupThread(void) | |
| 102 { | |
| 103 int i; | |
| 104 sigset_t mask; | |
| 105 | |
| 106 /* Mask asynchronous signals for this thread */ | |
| 107 sigemptyset(&mask); | |
| 108 for ( i=0; sig_list[i]; ++i ) { | |
| 109 sigaddset(&mask, sig_list[i]); | |
| 110 } | |
| 111 pthread_sigmask(SIG_BLOCK, &mask, 0); | |
| 112 | |
| 113 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS | |
| 114 /* Allow ourselves to be asynchronously cancelled */ | |
| 115 { int oldstate; | |
| 116 pthread_setcanceltype(PTHREAD_CANCEL_ASYNCHRONOUS, &oldstate); | |
| 117 } | |
| 118 #endif | |
| 119 } | |
| 120 | |
| 121 /* WARNING: This may not work for systems with 64-bit pid_t */ | |
| 122 Uint32 SDL_ThreadID(void) | |
| 123 { | |
| 124 return((Uint32)pthread_self()); | |
| 125 } | |
| 126 | |
| 127 void SDL_SYS_WaitThread(SDL_Thread *thread) | |
| 128 { | |
| 129 pthread_join(thread->handle, 0); | |
| 130 } | |
| 131 | |
| 132 void SDL_SYS_KillThread(SDL_Thread *thread) | |
| 133 { | |
| 134 #ifdef PTHREAD_CANCEL_ASYNCHRONOUS | |
| 135 pthread_cancel(thread->handle); | |
| 136 #else | |
| 137 #ifdef __FreeBSD__ | |
| 138 #warning For some reason, this doesnt actually kill a thread - FreeBSD 3.2 | |
| 139 #endif | |
| 140 pthread_kill(thread->handle, SIGKILL); | |
| 141 #endif | |
| 142 } | |
| 143 | |
| 144 #else /* Linux-specific clone() based implementation */ | |
| 145 | |
| 146 #include <stdlib.h> | |
| 147 #include <errno.h> | |
| 148 #include <unistd.h> | |
| 149 #include <sys/wait.h> | |
| 150 | |
| 151 | |
| 152 /* Stack size for child thread */ | |
| 153 #define STACKSIZE 16384*4 /* 16384 is too small */ | |
| 154 | |
| 155 #ifdef __GLIBC__ | |
| 156 #include <sched.h> | |
| 157 #else | |
| 158 /* From <linux/sched.h> */ | |
| 159 #define CLONE_VM 0x00000100 /* set if VM shared */ | |
| 160 #define CLONE_FS 0x00000200 /* set if fs info shared */ | |
| 161 #define CLONE_FILES 0x00000400 /* set if open files shared */ | |
| 162 #define CLONE_SIGHAND 0x00000800 /* set if signal handlers shared */ | |
| 163 #define CLONE_PID 0x00001000 /* set if pid shared */ | |
| 164 | |
| 165 /* The infamous "start_thread" function, courtesy Linus Torvalds */ | |
| 166 extern int clone(int (*fn)(void *arg), void *child_stack, int flags, void *arg); | |
| 167 #endif | |
| 168 | |
| 169 static int RunThread(void *data) | |
| 170 { | |
| 171 SDL_RunThread(data); | |
| 172 return(0); | |
| 173 } | |
| 174 | |
| 175 int SDL_SYS_CreateThread(SDL_Thread *thread, void *args) | |
| 176 { | |
| 177 void *stack; | |
| 178 | |
| 179 /* Allocate memory for thread stack */ | |
| 180 stack = malloc(STACKSIZE); | |
| 181 if ( stack == (void *)0 ) { | |
| 182 SDL_OutOfMemory(); | |
| 183 return(-1); | |
| 184 } | |
| 185 thread->data = stack; | |
| 186 | |
| 187 /* Adjust the stack since it actually grows down */ | |
| 188 stack = (void *) ((char *)stack + STACKSIZE); | |
| 189 | |
| 190 /* Create the thread and go! */ | |
| 191 thread->handle = clone(RunThread, stack, | |
| 192 (CLONE_VM|CLONE_FS|CLONE_FILES|CLONE_SIGHAND), args); | |
| 193 if ( thread->handle < 0 ) { | |
| 194 free(thread->data); | |
| 195 SDL_SetError("Not enough resources to create thread"); | |
| 196 return(-1); | |
| 197 } | |
| 198 return(0); | |
| 199 } | |
| 200 | |
| 201 void SDL_SYS_SetupThread(void) | |
| 202 { | |
| 203 int i; | |
| 204 sigset_t mask; | |
| 205 | |
| 206 /* Mask asynchronous signals for this thread */ | |
| 207 sigemptyset(&mask); | |
| 208 for ( i=0; sig_list[i]; ++i ) { | |
| 209 sigaddset(&mask, sig_list[i]); | |
| 210 } | |
| 211 sigprocmask(SIG_BLOCK, &mask, 0); | |
| 212 } | |
| 213 | |
| 214 /* WARNING: This may not work for systems with 64-bit pid_t */ | |
| 215 Uint32 SDL_ThreadID(void) | |
| 216 { | |
| 217 return((Uint32)getpid()); | |
| 218 } | |
| 219 | |
| 220 void SDL_SYS_WaitThread(SDL_Thread *thread) | |
| 221 { | |
| 222 #ifdef __WCLONE | |
| 223 errno = 0; | |
| 224 while ( errno != ECHILD ) { | |
| 225 waitpid(thread->handle, 0, __WCLONE); | |
| 226 } | |
| 227 #else | |
| 228 /* Ack, ugly ugly hack -- | |
| 229 wait() doesn't work, waitpid() doesn't work, and ignoring SIG_CHLD | |
| 230 doesn't work .. and the child thread is still a zombie, so kill() | |
| 231 doesn't work. | |
| 232 */ | |
| 233 char command[1024]; | |
| 234 | |
| 235 sprintf(command, | |
| 236 "ps ax|fgrep -v fgrep|fgrep -v '<zombie>'|fgrep %d >/dev/null", | |
| 237 thread->handle); | |
| 238 while ( system(command) == 0 ) | |
| 239 sleep(1); | |
| 240 #endif | |
| 241 free(thread->data); | |
| 242 } | |
| 243 | |
| 244 void SDL_SYS_KillThread(SDL_Thread *thread) | |
| 245 { | |
| 246 kill(thread->handle, SIGKILL); | |
| 247 } | |
| 248 | |
| 249 #endif /* SDL_USE_PTHREADS */ | |
| 250 | |
| 251 #endif /* FORK_HACK */ |