sysdeps/stub/libc-lock.h

   1 /* libc-internal interface for mutex locks.  Stub version.
   2 Copyright (C) 1996 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 Library General Public License as
   7 published by the Free Software Foundation; either version 2 of the
   8 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 Library General Public License for more details.
  14
  15 You should have received a copy of the GNU Library General Public
  16 License along with the GNU C Library; see the file COPYING.LIB.  If
  17 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  18 Cambridge, MA 02139, USA.  */
  19
  20 #ifndef _LIBC_LOCK_H
  21 #define _LIBC_LOCK_H 1
  22
  23
  24 /* Define a lock variable NAME with storage class CLASS.  The lock must be
  25    initialized with __libc_lock_init before it can be used (or define it
  26    with __libc_lock_define_initialized, below).  Use `extern' for CLASS to
  27    declare a lock defined in another module.  In public structure
  28    definitions you must use a pointer to the lock structure (i.e., NAME
  29    begins with a `*'), because its storage size will not be known outside
  30    of libc.  */
  31 #define __libc_lock_define(CLASS,NAME)
  32
  33 /* Define an initialized lock variable NAME with storage class CLASS.  */
  34 #define __libc_lock_define_initialized(CLASS,NAME)
  35
  36 /* Initialize the named lock variable, leaving it in a consistent, unlocked
  37    state.  */
  38 #define __libc_lock_init(NAME)
  39
  40 /* Finalize the named lock variable, which must be locked.  It cannot be
  41    used again until __libc_lock_init is called again on it.  This must be
  42    called on a lock variable before the containing storage is reused.  */
  43 #define __libc_lock_fini(NAME)
  44
  45 /* Lock the named lock variable.  */
  46 #define __libc_lock_lock(NAME)
  47
  48 /* Unlock the named lock variable.  */
  49 #define __libc_lock_unlock(NAME)
  50
  51 /* Start critical region with cleanup.  */
  52 #define __libc_cleanup_region_start(FCT, ARG)
  53
  54 /* End critical region with cleanup.  */
  55 #define __libc_cleanup_region_end(DOIT)
  56
  57
  58 #endif  /* libc-lock.h */