newlib/libc/include/sys/stdio.h

   1 #ifndef _NEWLIB_STDIO_H
   2 #define _NEWLIB_STDIO_H
   3
   4 #include <sys/lock.h>
   5 #include <sys/reent.h>
   6
   7 /* Internal locking macros, used to protect stdio functions.  In the
   8    general case, expand to nothing. Use __SSTR flag in FILE _flags to
   9    detect if FILE is private to sprintf/sscanf class of functions; if
  10    set then do nothing as lock is not initialised. */
  11 #if !defined(_flockfile)
  12 #ifndef __SINGLE_THREAD__
  13 #  define _flockfile(fp) (((fp)->_flags & __SSTR) ? 0 : __lock_acquire_recursive((fp)->_lock))
  14 #else
  15 #  define _flockfile(fp)        (_CASTVOID 0)
  16 #endif
  17 #endif
  18
  19 #if !defined(_funlockfile)
  20 #ifndef __SINGLE_THREAD__
  21 #  define _funlockfile(fp) (((fp)->_flags & __SSTR) ? 0 : __lock_release_recursive((fp)->_lock))
  22 #else
  23 #  define _funlockfile(fp)      (_CASTVOID 0)
  24 #endif
  25 #endif
  26
  27 #endif /* _NEWLIB_STDIO_H */