diff options
Diffstat (limited to 'linuxthreads/sighandler.c')
| -rw-r--r-- | linuxthreads/sighandler.c | 71 |
1 files changed, 71 insertions, 0 deletions
diff --git a/linuxthreads/sighandler.c b/linuxthreads/sighandler.c new file mode 100644 index 0000000000..9dd3e228f6 --- /dev/null +++ b/linuxthreads/sighandler.c @@ -0,0 +1,71 @@ +/* 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) { } |