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64 lines
2.3 KiB
C
64 lines
2.3 KiB
C
/* Thread package specific definitions of stream lock type. Hurd version.
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Copyright (C) 2000 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If not,
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write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _BITS_STDIO_LOCK_H
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#define _BITS_STDIO_LOCK_H 1
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/* We need recursive (counting) mutexes. Since cthreads doesn't really
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have them, we implement them just for libio. The implementation is
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partially here and partially in Hurd's version of cthreads (i.e. the
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libthreads library, libthreads/lockfile.c). */
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#if (_LIBC - 0) || (_CTHREADS_ - 0)
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#include <cthreads.h>
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struct _IO_cthreads_lock
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{
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struct mutex mutex;
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cthread_t owner;
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unsigned int count;
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};
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#else
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struct _IO_cthreads_lock;
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#endif
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typedef struct _IO_cthreads_lock _IO_lock_t;
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#define _IO_lock_initializer { MUTEX_INITIALIZER, 0, 0 }
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#define _IO_lock_init(_name) ({ (_name) = (_IO_lock_t) _IO_lock_initializer; })
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#define _IO_lock_fini(_name) ((void) 0) /* nothing to do */
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/* These are in fact only used for `list_all_lock' (libio/genops.c),
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which does not need a recursive lock. The per-FILE locks are only
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accessed through _IO_flockfile et al, which Hurd's libthreads overrides. */
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#define _IO_lock_lock(_name) __libc_lock_lock ((_name).mutex)
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#define _IO_lock_unlock(_name) __libc_lock_unlock ((_name).mutex)
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#ifdef _LIBC
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#include <bits/libc-lock.h>
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#define _IO_cleanup_region_start(_fct, _fp) \
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__libc_cleanup_region_start (_fct, _fp)
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#define _IO_cleanup_region_end(_doit) \
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__libc_cleanup_region_end (_doit)
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#endif
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#endif /* bits/stdio-lock.h */
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