Initial commit of upstream NSPR (4.7.3) and NSS3 (3.12).

third_party/nspr/mozilla/nsprpub/pr/include/prolock.h

Index: third_party/nspr/mozilla/nsprpub/pr/include/prolock.h
diff --git a/third_party/nspr/mozilla/nsprpub/pr/include/prolock.h b/third_party/nspr/mozilla/nsprpub/pr/include/prolock.h
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index 0000000000000000000000000000000000000000..d8aece986c56c01b4ef01cefeb5148047e765300
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+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Netscape Portable Runtime (NSPR).
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications Corporation.
+ * Portions created by the Initial Developer are Copyright (C) 1998-2000
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either the GNU General Public License Version 2 or later (the "GPL"), or
+ * the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+#ifndef prolock_h___
+#define prolock_h___
+
+#include "prtypes.h"
+
+PR_BEGIN_EXTERN_C
+
+/*
+** A locking mechanism, built on the existing PRLock definiion,
+** is provided that will permit applications to define a Lock
+** Hierarchy (or Lock Ordering) schema. An application designed
+** using the Ordered Lock functions will terminate with a
+** diagnostic message when a lock inversion condition is
+** detected. 
+** 
+** The lock ordering detection is complile-time enabled only. in
+** optimized builds of NSPR, the Ordered Lock functions map
+** directly to PRLock functions, providing no lock order
+** detection.
+** 
+** The Ordered Lock Facility is compiled in when DEBUG is defined at
+** compile time. Ordered Lock can be forced on in optimized builds by
+** defining FORCE_NSPR_ORDERED_LOCK at compile time. Both the
+** application using Ordered Lock and NSPR must be compiled with the
+** facility enabled to achieve the desired results.
+** 
+** Application designers should use the macro interfaces to the Ordered
+** Lock facility to ensure that it is compiled out in optimized builds.
+**
+** Application designers are responsible for defining their own
+** lock hierarchy. 
+**
+** Ordered Lock is thread-safe and SMP safe.
+**
+** See Also: prlock.h
+**
+** /lth. 10-Jun-1998.
+**
+*/
+
+/*
+** Opaque type for ordered lock.
+** ... Don't even think of looking in here.
+**
+*/
+
+#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
+typedef void * PROrderedLock;
+#else
+/*
+** Map PROrderedLock and methods onto PRLock when ordered locking
+** is not compiled in.
+**  
+*/
+#include "prlock.h"
+
+typedef PRLock PROrderedLock;
+#endif
+
+/* -----------------------------------------------------------------------
+** FUNCTION: PR_CreateOrderedLock() -- Create an Ordered Lock
+** 
+** DESCRIPTION: PR_CreateOrderedLock() creates an ordered lock.
+** 
+** INPUTS:
+**  order: user defined order of this lock.
+**  name: name of the lock. For debugging purposes.
+** 
+** OUTPUTS: returned
+** 
+** RETURNS: PR_OrderedLock pointer
+** 
+** RESTRICTIONS:
+** 
+*/
+#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
+#define PR_CREATE_ORDERED_LOCK(order,name)\
+    PR_CreateOrderedLock((order),(name))
+#else
+#define PR_CREATE_ORDERED_LOCK(order) PR_NewLock()
+#endif
+
+NSPR_API(PROrderedLock *) 
+    PR_CreateOrderedLock( 
+        PRInt32 order,
+        const char *name
+);
+
+/* -----------------------------------------------------------------------
+** FUNCTION: PR_DestroyOrderedLock() -- Destroy an Ordered Lock
+** 
+** DESCRIPTION: PR_DestroyOrderedLock() destroys the ordered lock
+** referenced by lock.
+** 
+** INPUTS: lock: pointer to a PROrderedLock
+** 
+** OUTPUTS: the lock is destroyed
+** 
+** RETURNS: void
+** 
+** RESTRICTIONS:
+** 
+*/
+#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
+#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyOrderedLock((lock))
+#else
+#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyLock((lock))
+#endif
+
+NSPR_API(void) 
+    PR_DestroyOrderedLock( 
+        PROrderedLock *lock 
+);
+
+/* -----------------------------------------------------------------------
+** FUNCTION: PR_LockOrderedLock() -- Lock an ordered lock
+** 
+** DESCRIPTION: PR_LockOrderedLock() locks the ordered lock
+** referenced by lock. If the order of lock is less than or equal
+** to the order of the highest lock held by the locking thread,
+** the function asserts.
+** 
+** INPUTS: lock: a pointer to a PROrderedLock
+** 
+** OUTPUTS: The lock is held or the function asserts.
+** 
+** RETURNS: void
+** 
+** RESTRICTIONS:
+** 
+*/
+#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
+#define PR_LOCK_ORDERED_LOCK(lock) PR_LockOrderedLock((lock))
+#else
+#define PR_LOCK_ORDERED_LOCK(lock) PR_Lock((lock))
+#endif
+
+NSPR_API(void) 
+    PR_LockOrderedLock( 
+        PROrderedLock *lock 
+);
+
+/* -----------------------------------------------------------------------
+** FUNCTION: PR_UnlockOrderedLock() -- unlock and Ordered Lock
+** 
+** DESCRIPTION: PR_UnlockOrderedLock() unlocks the lock referenced
+** by lock.
+** 
+** INPUTS: lock: a pointer to a PROrderedLock
+** 
+** OUTPUTS: the lock is unlocked
+** 
+** RETURNS:
+**  PR_SUCCESS
+**  PR_FAILURE
+** 
+** RESTRICTIONS:
+** 
+*/
+#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
+#define PR_UNLOCK_ORDERED_LOCK(lock) PR_UnlockOrderedLock((lock))
+#else
+#define PR_UNLOCK_ORDERED_LOCK(lock) PR_Unlock((lock))
+#endif
+
+NSPR_API(PRStatus) 
+    PR_UnlockOrderedLock( 
+        PROrderedLock *lock 
+);
+
+PR_END_EXTERN_C
+
+#endif /* prolock_h___ */