mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-13 00:30:07 +00:00
72 lines
2.7 KiB
C
72 lines
2.7 KiB
C
/* 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) { }
|