sysdeps/unix/sysv/linux/sendmmsg.c

   1 /* Copyright (C) 2011-2017 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ulrich Drepper <drepper@gmail.com>, 2011.
   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/socket.h>
  21
  22 #include <sysdep-cancel.h>
  23 #include <sys/syscall.h>
  24 #include <socketcall.h>
  25 #include <kernel-features.h>
  26
  27 int
  28 __sendmmsg (int fd, struct mmsghdr *vmessages, unsigned int vlen, int flags)
  29 {
  30   /* Do not use the sendmmsg syscall on socketcall architectures unless
  31      it was added at the same time as the socketcall support or can be
  32      assumed to be present.  */
  33 #if defined __ASSUME_SOCKETCALL \
  34     && !defined __ASSUME_SENDMMSG_SYSCALL_WITH_SOCKETCALL \
  35     && !defined __ASSUME_SENDMMSG_SYSCALL
  36   return SOCKETCALL_CANCEL (sendmmsg, fd, vmessages, vlen, flags);
  37 #else
  38   return SYSCALL_CANCEL (sendmmsg, fd, vmessages, vlen, flags);
  39 #endif
  40 }
  41 libc_hidden_def (__sendmmsg)
  42 weak_alias (__sendmmsg, sendmmsg)