From 0b3366f6a93ac0f7e2028745ea557c0acd8722c6 Mon Sep 17 00:00:00 2001
From: "\"Steven J. Hill\"" <sjhill@realitydiluted.com>
Date: Sat, 7 May 2005 02:04:55 +0000
Subject: Import in NPTL code from glibc. For further information please
 consult the 'README.NPTL' file.

---
 libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h | 105 ++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h

(limited to 'libpthread/nptl/sysdeps/pthread/bits/stdio-lock.h')

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 */
-- 
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