1  /* Copyright (C) 2016-2023 Free Software Foundation, Inc.
       2     This file is part of the GNU C Library.
       3  
       4     The GNU C Library is free software; you can redistribute it and/or
       5     modify it under the terms of the GNU Lesser General Public
       6     License as published by the Free Software Foundation; either
       7     version 2.1 of the License, or (at your option) any later version.
       8  
       9     The GNU C Library is distributed in the hope that it will be useful,
      10     but WITHOUT ANY WARRANTY; without even the implied warranty of
      11     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
      12     Lesser General Public License for more details.
      13  
      14     You should have received a copy of the GNU Lesser General Public
      15     License along with the GNU C Library; if not, see
      16     <https://www.gnu.org/licenses/>.  */
      17  
      18  #include <sys/uio.h>
      19  #include <sysdep-cancel.h>
      20  
      21  #ifdef __ASSUME_PREADV
      22  
      23  ssize_t
      24  preadv64 (int fd, const struct iovec *vector, int count, off64_t offset)
      25  {
      26    return SYSCALL_CANCEL (preadv, fd, vector, count, LO_HI_LONG (offset));
      27  }
      28  #else
      29  static ssize_t __atomic_preadv64_replacement (int, const struct iovec *,
      30  					      int, off64_t);
      31  ssize_t
      32  preadv64 (int fd, const struct iovec *vector, int count, off64_t offset)
      33  {
      34    ssize_t result = SYSCALL_CANCEL (preadv, fd, vector, count,
      35  				   LO_HI_LONG (offset));
      36    if (result >= 0 || errno != ENOSYS)
      37      return result;
      38    return __atomic_preadv64_replacement (fd, vector, count, offset);
      39  }
      40  # define PREADV static __atomic_preadv64_replacement
      41  # define PREAD __pread64
      42  # define OFF_T off64_t
      43  # include <sysdeps/posix/preadv_common.c>
      44  #endif
      45  libc_hidden_def (preadv64)
      46  
      47  #ifdef __OFF_T_MATCHES_OFF64_T
      48  strong_alias (preadv64, preadv)
      49  libc_hidden_def (preadv)
      50  #endif