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 libc_hidden_proto(__fgetc_unlocked)
  11
  12 #undef getchar
  13 #ifdef __DO_UNLOCKED
  14
  15 #undef getchar_unlocked
  16 int getchar_unlocked(void)
  17 {
  18         register FILE *stream = stdin;
  19
  20         return __GETC_UNLOCKED_MACRO(stream);
  21 }
  22
  23 #ifndef __UCLIBC_HAS_THREADS__
  24 strong_alias(getchar_unlocked,getchar)
  25 #endif
  26
  27 #elif defined __UCLIBC_HAS_THREADS__
  28
  29 int getchar(void)
  30 {
  31         register FILE *stream = stdin;
  32
  33         if (stream->__user_locking != 0) {
  34                 return __GETC_UNLOCKED_MACRO(stream);
  35         } else {
  36                 int retval;
  37                 __STDIO_ALWAYS_THREADLOCK(stream);
  38                 retval = __GETC_UNLOCKED_MACRO(stream);
  39                 __STDIO_ALWAYS_THREADUNLOCK(stream);
  40                 return retval;
  41         }
  42 }
  43
  44 #endif