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/* Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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 <errno.h>
#include <limits.h>
#include <signal.h>
#include <sysdep.h>
#include <pthreadP.h>
#include <bits/kernel-features.h>
int
raise (
int sig)
{
struct pthread *pd = THREAD_SELF;
#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
pid_t pid = THREAD_GETMEM (pd, pid);
#endif
pid_t selftid = THREAD_GETMEM (pd, tid);
if (selftid == 0)
{
/* This system call is not supposed to fail. */
#ifdef INTERNAL_SYSCALL
INTERNAL_SYSCALL_DECL (err);
selftid = INTERNAL_SYSCALL (gettid, err, 0);
#else
selftid = INLINE_SYSCALL (gettid, 0);
#endif
THREAD_SETMEM (pd, tid, selftid);
#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
/* We do not set the PID field in the TID here since we might be
called from a signal handler while the thread executes fork. */
pid = selftid;
#endif
}
#if (defined(__ASSUME_TGKILL) && __ASSUME_TGKILL) || defined __NR_tgkill
else
/* raise is an async-safe function. It could be called while the
fork/vfork function temporarily invalidated the PID field. Adjust for
that. */
if (__builtin_expect (pid <= 0, 0))
pid = (pid & INT_MAX) == 0 ? selftid : -pid;
#endif
#if defined(__ASSUME_TGKILL) && __ASSUME_TGKILL
return INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
#else
# ifdef __NR_tgkill
int res = INLINE_SYSCALL (tgkill, 3, pid, selftid, sig);
if (res != -1 || errno != ENOSYS)
return res;
# endif
return INLINE_SYSCALL (tkill, 2, selftid, sig);
#endif
}
libc_hidden_def (raise)
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