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glibc  2.9
aio_sigqueue.c
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00001 /* Copyright (C) 1997,1998,1999,2000,2003,2005
00002        Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 #include <aio.h>
00021 #include <errno.h>
00022 #include <signal.h>
00023 #include <unistd.h>
00024 #include <string.h>
00025 
00026 #include <sysdep.h>
00027 #include <sys/syscall.h>
00028 
00029 #include <aio_misc.h>
00030 
00031 #ifdef __NR_rt_sigqueueinfo
00032 
00033 /* Return any pending signal or wait for one for the given time.  */
00034 int
00035 __aio_sigqueue (sig, val, caller_pid)
00036      int sig;
00037      const union sigval val;
00038      pid_t caller_pid;
00039 {
00040   siginfo_t info;
00041 
00042   /* First, clear the siginfo_t structure, so that we don't pass our
00043      stack content to other tasks.  */
00044   memset (&info, 0, sizeof (siginfo_t));
00045   /* We must pass the information about the data in a siginfo_t value.  */
00046   info.si_signo = sig;
00047   info.si_code = SI_ASYNCIO;
00048   info.si_pid = caller_pid;
00049   info.si_uid = getuid ();
00050   info.si_value = val;
00051 
00052   return INLINE_SYSCALL (rt_sigqueueinfo, 3, info.si_pid,
00053                       sig, __ptrvalue (&info));
00054 }
00055 #else
00056 # include <rt/aio_sigqueue.c>
00057 #endif