sysdeps/unix/sysv/linux/msgsnd.c

   1 /* Copyright (C) 1995-2014 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@cygnus.com>, August 1995.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <http://www.gnu.org/licenses/>.  */
  18
  19 #include <errno.h>
  20 #include <sys/msg.h>
  21 #include <ipc_priv.h>
  22
  23 #include <sysdep-cancel.h>
  24 #include <sys/syscall.h>
  25
  26 int
  27 __libc_msgsnd (msqid, msgp, msgsz, msgflg)
  28      int msqid;
  29      const void *msgp;
  30      size_t msgsz;
  31      int msgflg;
  32 {
  33   if (SINGLE_THREAD_P)
  34     return INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
  35                            msgflg, (void *) msgp);
  36
  37   int oldtype = LIBC_CANCEL_ASYNC ();
  38
  39   int result = INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
  40                                msgflg, (void *) msgp);
  41
  42   LIBC_CANCEL_RESET (oldtype);
  43
  44   return result;
  45 }
  46 weak_alias (__libc_msgsnd, msgsnd)