sigqueue.c

Newlib 嵌入式 C库 标准实现代码

/* Copyright (C) 1997, 1998, 2000 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, write to the Free
   Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
   02111-1307 USA.  */

/* Modified for newlib by Jeff Johnston, May 30, 2002 */

#include <errno.h>
#include <signal.h>
#include <unistd.h>
#include <string.h>

#include <machine/syscall.h>

#define __NR___rt_sigqueueinfo __NR_rt_sigqueueinfo

extern uid_t __getuid();
extern pid_t __getpid();

static _syscall3(int,__rt_sigqueueinfo,int,pid,int,sig,siginfo_t *,info)

/* Return any pending signal or wait for one for the given time.  */
int
__sigqueue (pid, sig, val)
     pid_t pid;
     int sig;
     const union sigval val;
{
  siginfo_t info;

  /* First, clear the siginfo_t structure, so that we don't pass our
     stack content to other tasks.  */
  memset (&info, 0, sizeof (siginfo_t));
  /* We must pass the information about the data in a siginfo_t value.  */
  info.si_signo = sig;
  info.si_code = SI_QUEUE;
  info.si_pid = __getpid ();
  info.si_uid = __getuid ();
  info.si_value = val;

  return __rt_sigqueueinfo(pid, sig, &info);
}
weak_alias (__sigqueue, sigqueue)