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- /* 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) { }
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