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glibc/sysdeps/unix/sysv/linux/nptl-signals.h
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/* Special use of signals in NPTL internals. Linux version. | |
Copyright (C) 2014-2016 Free Software Foundation, Inc. | |
This file is part of the GNU C Library. | |
The GNU C Library is free software; you can redistribute it and/or | |
modify it under the terms of the GNU Lesser General Public | |
License as published by the Free Software Foundation; either | |
version 2.1 of the License, or (at your option) any later version. | |
The GNU C Library 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 | |
Lesser General Public License for more details. | |
You should have received a copy of the GNU Lesser General Public | |
License along with the GNU C Library; if not, see | |
<http://www.gnu.org/licenses/>. */ | |
#include <signal.h> | |
/* The signal used for asynchronous cancelation. */ | |
#define SIGCANCEL __SIGRTMIN | |
/* Signal needed for the kernel-supported POSIX timer implementation. | |
We can reuse the cancellation signal since we can distinguish | |
cancellation from timer expirations. */ | |
#define SIGTIMER SIGCANCEL | |
/* Signal used to implement the setuid et.al. functions. */ | |
#define SIGSETXID (__SIGRTMIN + 1) | |
/* Return is sig is used internally. */ | |
static inline int | |
__nptl_is_internal_signal (int sig) | |
{ | |
return (sig == SIGCANCEL) || (sig == SIGTIMER) || (sig == SIGSETXID); | |
} | |
/* Used to communicate with signal handler. */ | |
extern struct xid_command *__xidcmd attribute_hidden; |