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