/* 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, write to the Free   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA   02111-1307 USA.  */#include <errno.h>#include <limits.h>#include <signal.h>#include <sysdep.h>#include <nptl/pthreadP.h>#include <kernel-features.h>intraise (sig)     int sig;{  struct pthread *pd = THREAD_SELF;#if __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 __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 __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 __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)weak_alias (raise, gsignal)