| /* Linuxthreads - a simple clone()-based implementation of Posix */ |
| /* threads for Linux. */ |
| /* Copyright (C) 1996 Xavier Leroy (Xavier.Leroy@inria.fr) */ |
| /* */ |
| /* This program is free software; you can redistribute it and/or */ |
| /* modify it under the terms of the GNU Library General Public License */ |
| /* as published by the Free Software Foundation; either version 2 */ |
| /* of the License, or (at your option) any later version. */ |
| /* */ |
| /* This program is distributed in the hope that it will be useful, */ |
| /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| /* GNU Library General Public License for more details. */ |
| |
| /* Signal handlers */ |
| |
| #include "internals.h" |
| |
| |
| /* The wrapper around user-provided signal handlers */ |
| void __pthread_sighandler(int signo, SIGCONTEXT ctx) |
| { |
| pthread_descr self; |
| char * in_sighandler; |
| self = check_thread_self(); |
| |
| /* If we're in a sigwait operation, just record the signal received |
| and return without calling the user's handler */ |
| if (THREAD_GETMEM(self, p_sigwaiting)) { |
| THREAD_SETMEM(self, p_sigwaiting, 0); |
| THREAD_SETMEM(self, p_signal, signo); |
| return; |
| } |
| /* Record that we're in a signal handler and call the user's |
| handler function */ |
| in_sighandler = THREAD_GETMEM(self, p_in_sighandler); |
| if (in_sighandler == NULL) |
| THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME); |
| CALL_SIGHANDLER(__sighandler[signo].old, signo, ctx); |
| if (in_sighandler == NULL) |
| THREAD_SETMEM(self, p_in_sighandler, NULL); |
| } |
| |
| /* The same, this time for real-time signals. */ |
| void __pthread_sighandler_rt(int signo, struct siginfo *si, |
| struct ucontext *uc) |
| { |
| pthread_descr self; |
| char * in_sighandler; |
| self = check_thread_self(); |
| |
| /* If we're in a sigwait operation, just record the signal received |
| and return without calling the user's handler */ |
| if (THREAD_GETMEM(self, p_sigwaiting)) { |
| THREAD_SETMEM(self, p_sigwaiting, 0); |
| THREAD_SETMEM(self, p_signal, signo); |
| return; |
| } |
| /* Record that we're in a signal handler and call the user's |
| handler function */ |
| in_sighandler = THREAD_GETMEM(self, p_in_sighandler); |
| if (in_sighandler == NULL) |
| THREAD_SETMEM(self, p_in_sighandler, CURRENT_STACK_FRAME); |
| __sighandler[signo].rt(signo, si, uc); |
| if (in_sighandler == NULL) |
| THREAD_SETMEM(self, p_in_sighandler, NULL); |
| } |
| |
| |
| /* A signal handler that does nothing */ |
| void __pthread_null_sighandler(int sig) { } |