sysdeps/htl/stdio-lock.h

   1 /* Thread package specific definitions of stream lock type.  Hurd version.
   2    Copyright (C) 2000-2021 Free Software Foundation, Inc.
   3    This file is part of the GNU C Library.
   4
   5    The GNU C Library is free software; you can redistribute it and/or
   6    modify it under the terms of the GNU Lesser General Public
   7    License as published by the Free Software Foundation; either
   8    version 2.1 of the License, or (at your option) any later version.
   9
  10    The GNU C Library is distributed in the hope that it will be useful,
  11    but WITHOUT ANY WARRANTY; without even the implied warranty of
  12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13    Lesser General Public License for more details.
  14
  15    You should have received a copy of the GNU Lesser General Public
  16    License along with the GNU C Library; if not, see
  17    <https://www.gnu.org/licenses/>.  */
  18
  19 #ifndef _STDIO_LOCK_H
  20 #define _STDIO_LOCK_H 1
  21
  22 #include <libc-lock.h>
  23
  24 __libc_lock_define_recursive (typedef, _IO_lock_t)
  25 #define _IO_lock_t_defined 1
  26
  27 /* We need recursive (counting) mutexes.  */
  28 # define _IO_lock_initializer _LIBC_LOCK_RECURSIVE_INITIALIZER
  29
  30 #define _IO_lock_init(_name)    __libc_lock_init_recursive (_name)
  31 #define _IO_lock_fini(_name)    __libc_lock_fini_recursive (_name)
  32 #define _IO_lock_lock(_name)    __libc_lock_lock_recursive (_name)
  33 #define _IO_lock_trylock(_name) __libc_lock_trylock_recursive (_name)
  34 #define _IO_lock_unlock(_name)  __libc_lock_unlock_recursive (_name)
  35
  36
  37 #define _IO_cleanup_region_start(_fct, _fp) \
  38   __libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp)
  39 #define _IO_cleanup_region_start_noarg(_fct) \
  40   __libc_cleanup_region_start (1, _fct, NULL)
  41 #define _IO_cleanup_region_end(_doit) \
  42   __libc_cleanup_region_end (_doit)
  43
  44 #if defined _LIBC && IS_IN (libc)
  45
  46 # define _IO_acquire_lock(_fp) \
  47   do {                                                                        \
  48     _IO_cleanup_region_start((void (*) (void *)) &_IO_funlockfile, _fp);      \
  49     _IO_flockfile (_fp);
  50 # define _IO_release_lock(_fp) \
  51     _IO_funlockfile (_fp);                                                    \
  52     _IO_cleanup_region_end (0);                                               \
  53   } while (0)
  54
  55 #endif
  56
  57 #endif /* stdio-lock.h */