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authorRoland McGrath <roland@gnu.org>2000-03-27 03:57:46 +0000
committerRoland McGrath <roland@gnu.org>2000-03-27 03:57:46 +0000
commit1c479f72fe717105a809d744e0dcab3608a949d5 (patch)
tree0c764fb00037d3daf0fad8caacebdc649445d59a /sysdeps/mach/hurd/bits
parenta7ca88b86b1fc05bef72e610f4dc627f1f1796de (diff)
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* libio/Makefile (headers): Add bits/stdio-lock.h here.
* sysdeps/mach/hurd/bits/stdio-lock.h: New file.
Diffstat (limited to 'sysdeps/mach/hurd/bits')
-rw-r--r--sysdeps/mach/hurd/bits/stdio-lock.h62
1 files changed, 62 insertions, 0 deletions
diff --git a/sysdeps/mach/hurd/bits/stdio-lock.h b/sysdeps/mach/hurd/bits/stdio-lock.h
new file mode 100644
index 0000000000..1f67542c42
--- /dev/null
+++ b/sysdeps/mach/hurd/bits/stdio-lock.h
@@ -0,0 +1,62 @@
+/* Thread package specific definitions of stream lock type. Hurd version.
+ Copyright (C) 2000 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Library General Public License as
+ published by the Free Software Foundation; either version 2 of the
+ License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Library General Public License for more details.
+
+ You should have received a copy of the GNU Library General Public
+ License along with the GNU C Library; see the file COPYING.LIB. If not,
+ write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+ Boston, MA 02111-1307, USA. */
+
+#ifndef _BITS_STDIO_LOCK_H
+#define _BITS_STDIO_LOCK_H 1
+
+/* We need recursive (counting) mutexes. Since cthreads doesn't really
+ have them, we implement them just for libio. The implementation is
+ partially here and partially in Hurd's version of cthreads (i.e. the
+ libthreads library, libthreads/lockfile.c). */
+
+#if (_LIBC - 0) || (_CTHREADS_ - 0)
+#include <cthreads.h>
+
+struct _IO_cthreads_lock
+{
+ struct mutex mutex;
+ cthread_t owner;
+ unsigned int count;
+};
+#else
+struct _IO_cthreads_lock;
+#endif
+typedef struct _IO_cthreads_lock _IO_lock_t;
+
+#define _IO_lock_initializer { MUTEX_INITIALIZER, 0, 0 }
+
+#define _IO_lock_init(_name) ({ (_name) = (_IO_lock_t) _IO_lock_initializer; })
+#define _IO_lock_fini(_name) ((void) 0) /* nothing to do */
+
+/* These are in fact only used for `list_all_lock' (libio/genops.c),
+ which does not need a recursive lock. The per-FILE locks are only
+ accessed through _IO_flockfile et al, which Hurd's libthreads overrides. */
+#define _IO_lock_lock(_name) __libc_lock_lock ((_name).mutex)
+#define _IO_lock_unlock(_name) __libc_lock_unlock ((_name).mutex)
+
+
+#include <bits/libc-lock.h>
+
+#define _IO_cleanup_region_start(_fct, _fp) \
+ __libc_cleanup_region_start (_fct, _fp)
+#define _IO_cleanup_region_end(_doit) \
+ __libc_cleanup_region_end (_doit)
+
+
+#endif /* bits/stdio-lock.h */