libc/stdio/fileno.c

   1 /* Copyright (C) 2004       Manuel Novoa III    <mjn3@codepoet.org>
   2  *
   3  * GNU Library General Public License (LGPL) version 2 or later.
   4  *
   5  * Dedicated to Toni.  See uClibc/DEDICATION.mjn3 for details.
   6  */
   7
   8 #include "_stdio.h"
   9
  10
  11 #ifdef __DO_UNLOCKED
  12
  13 int fileno_unlocked(register FILE *stream)
  14 {
  15         __STDIO_STREAM_VALIDATE(stream);
  16
  17         if ((!__STDIO_STREAM_IS_CUSTOM(stream)) && (stream->__filedes >= 0)) {
  18                 return stream->__filedes;
  19         }
  20
  21         __set_errno(EBADF);
  22         return -1;
  23 }
  24 libc_hidden_def(fileno_unlocked)
  25
  26 #ifndef __UCLIBC_HAS_THREADS__
  27 strong_alias(fileno_unlocked,fileno)
  28 libc_hidden_def(fileno)
  29 #endif
  30
  31 #elif defined __UCLIBC_HAS_THREADS__
  32
  33 int fileno(register FILE *stream)
  34 {
  35         int retval;
  36         __STDIO_AUTO_THREADLOCK_VAR;
  37
  38         __STDIO_AUTO_THREADLOCK(stream);
  39
  40         retval = fileno_unlocked(stream);
  41
  42         __STDIO_AUTO_THREADUNLOCK(stream);
  43
  44         return retval;
  45 }
  46 libc_hidden_def(fileno)
  47
  48 #endif