sysdeps/unix/sysv/linux/msgsnd.c

   1 /* Copyright (C) 1995,1997,1998,1999,2000,2002 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, write to the Free
  17    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  18    02111-1307 USA.  */
  19
  20 #include <errno.h>
  21 #include <sys/msg.h>
  22 #include <ipc_priv.h>
  23
  24 #include <sysdep-cancel.h>
  25 #include <sys/syscall.h>
  26
  27 #include <bp-checks.h>
  28
  29 int
  30 __libc_msgsnd (msqid, msgp, msgsz, msgflg)
  31      int msqid;
  32      const void *msgp;
  33      size_t msgsz;
  34      int msgflg;
  35 {
  36   if (SINGLE_THREAD_P)
  37     return INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
  38                            msgflg, (void *) CHECK_N (msgp, msgsz));
  39
  40   int oldtype = LIBC_CANCEL_ASYNC ();
  41
  42   int result = INLINE_SYSCALL (ipc, 5, IPCOP_msgsnd, msqid, msgsz,
  43                                msgflg, (void *) CHECK_N (msgp, msgsz));
  44
  45   LIBC_CANCEL_RESET (oldtype);
  46
  47   return result;
  48 }
  49 weak_alias (__libc_msgsnd, msgsnd)