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author"Steven J. Hill" <sjhill@realitydiluted.com>2005-05-07 02:04:55 +0000
committer"Steven J. Hill" <sjhill@realitydiluted.com>2005-05-07 02:04:55 +0000
commit0b3366f6a93ac0f7e2028745ea557c0acd8722c6 (patch)
tree2a87cb353c106eb55a44437d3b4d5e0d60af1d36 /libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h
parent2274f6b2ddc7d7ea919a8fa1f9c54ef1920cb180 (diff)
Import in NPTL code from glibc. For further information please
consult the 'README.NPTL' file.
Diffstat (limited to 'libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h')
-rw-r--r--libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h105
1 files changed, 105 insertions, 0 deletions
diff --git a/libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h b/libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h
new file mode 100644
index 000000000..cd64bc37e
--- /dev/null
+++ b/libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h
@@ -0,0 +1,105 @@
+/* Thread package specific definitions of stream lock type. NPTL version.
+ Copyright (C) 2000, 2001, 2002, 2003 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 Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; 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
+
+#include <bits/libc-lock.h>
+#include <lowlevellock.h>
+
+
+/* The locking here is very inexpensive, even for inlining. */
+#define _IO_lock_inexpensive 1
+
+typedef struct { int lock; int cnt; void *owner; } _IO_lock_t;
+
+#define _IO_lock_initializer { LLL_LOCK_INITIALIZER, 0, NULL }
+
+#define _IO_lock_init(_name) \
+ ((_name) = (_IO_lock_t) _IO_lock_initializer , 0)
+
+#define _IO_lock_fini(_name) \
+ ((void) 0)
+
+#define _IO_lock_lock(_name) \
+ do { \
+ void *__self = THREAD_SELF; \
+ if ((_name).owner != __self) \
+ { \
+ lll_lock ((_name).lock); \
+ (_name).owner = __self; \
+ } \
+ ++(_name).cnt; \
+ } while (0)
+
+#define _IO_lock_trylock(_name) \
+ ({ \
+ int __result = 0; \
+ void *__self = THREAD_SELF; \
+ if ((_name).owner != __self) \
+ { \
+ if (lll_trylock ((_name).lock) == 0) \
+ { \
+ (_name).owner = __self; \
+ (_name).cnt = 1; \
+ } \
+ else \
+ __result = EBUSY; \
+ } \
+ else \
+ ++(_name).cnt; \
+ __result; \
+ })
+
+#define _IO_lock_unlock(_name) \
+ do { \
+ if (--(_name).cnt == 0) \
+ { \
+ (_name).owner = NULL; \
+ lll_unlock ((_name).lock); \
+ } \
+ } while (0)
+
+
+
+#define _IO_cleanup_region_start(_fct, _fp) \
+ __libc_cleanup_region_start (((_fp)->_flags & _IO_USER_LOCK) == 0, _fct, _fp)
+#define _IO_cleanup_region_start_noarg(_fct) \
+ __libc_cleanup_region_start (1, _fct, NULL)
+#define _IO_cleanup_region_end(_doit) \
+ __libc_cleanup_region_end (_doit)
+
+#if defined _LIBC && !defined NOT_IN_libc
+
+# ifdef __EXCEPTIONS
+# define _IO_acquire_lock(_fp) \
+ do { \
+ _IO_FILE *_IO_acquire_lock_file \
+ __attribute__((cleanup (_IO_acquire_lock_fct))) \
+ = (_fp); \
+ _IO_flockfile (_IO_acquire_lock_file);
+
+# else
+# define _IO_acquire_lock(_fp) _IO_acquire_lock_needs_exceptions_enabled
+# endif
+# define _IO_release_lock(_fp) ; } while (0)
+
+#endif
+
+#endif /* bits/stdio-lock.h */