libc/stdio/getchar.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 #undef getchar
  12 #ifdef __DO_UNLOCKED
  13
  14 /* the only use of the hidden getchar_unlocked is in gets.c */
  15 #undef getchar_unlocked
  16 int getchar_unlocked(void)
  17 {
  18         register FILE *stream = stdin;
  19
  20         return __GETC_UNLOCKED_MACRO(stream);
  21 }
  22 libc_hidden_def(getchar_unlocked)
  23
  24 #ifndef __UCLIBC_HAS_THREADS__
  25 strong_alias(getchar_unlocked,getchar)
  26 #endif
  27
  28 #elif defined __UCLIBC_HAS_THREADS__
  29
  30 int getchar(void)
  31 {
  32         register FILE *stream = stdin;
  33
  34         if (stream->__user_locking != 0) {
  35                 return __GETC_UNLOCKED_MACRO(stream);
  36         } else {
  37                 int retval;
  38                 __STDIO_ALWAYS_THREADLOCK(stream);
  39                 retval = __GETC_UNLOCKED_MACRO(stream);
  40                 __STDIO_ALWAYS_THREADUNLOCK(stream);
  41                 return retval;
  42         }
  43 }
  44
  45 #endif