sysdeps/unix/sysv/linux/mips/pwrite64.c

   1 /* Copyright (C) 1997-2015 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3    Contributed by Ralf Baechle <ralf@gnu.org>, 1998.
   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 #ifndef NO_SGIDEFS_H
  21 #include <sgidefs.h>
  22 #endif
  23 #include <unistd.h>
  24 #include <endian.h>
  25
  26 #include <sysdep-cancel.h>
  27 #include <sys/syscall.h>
  28
  29 #ifdef __NR_pwrite64            /* Newer kernels renamed but it's the same.  */
  30 # ifdef __NR_pwrite
  31 #  error "__NR_pwrite and __NR_pwrite64 both defined???"
  32 # endif
  33 # define __NR_pwrite __NR_pwrite64
  34 #endif
  35
  36
  37 ssize_t
  38 __libc_pwrite64 (fd, buf, count, offset)
  39      int fd;
  40      const void *buf;
  41      size_t count;
  42      off64_t offset;
  43 {
  44   ssize_t result;
  45
  46   if (SINGLE_THREAD_P)
  47     {
  48 #if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64
  49       result = INLINE_SYSCALL (pwrite, 4, fd, buf, count, offset);
  50 #else
  51      result = INLINE_SYSCALL (pwrite, 6, fd, buf, count, 0,
  52                               __LONG_LONG_PAIR ((off_t) (offset >> 32),
  53                              (off_t) (offset & 0xffffffff)));
  54 #endif
  55
  56      return result;
  57     }
  58
  59   int oldtype = LIBC_CANCEL_ASYNC ();
  60
  61 #if _MIPS_SIM == _ABIN32 || _MIPS_SIM == _ABI64
  62   result = INLINE_SYSCALL (pwrite, 4, fd, buf, count, offset);
  63 #else
  64   result = INLINE_SYSCALL (pwrite, 6, fd, buf, count, 0,
  65                            __LONG_LONG_PAIR ((off_t) (offset >> 32),
  66                                              (off_t) (offset & 0xffffffff)));
  67 #endif
  68
  69   LIBC_CANCEL_RESET (oldtype);
  70
  71   return result;
  72 }
  73
  74 weak_alias (__libc_pwrite64, __pwrite64)
  75 libc_hidden_weak (__pwrite64)
  76 weak_alias (__libc_pwrite64, pwrite64)