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Src/nprt_plugin/gecko/1.8/win/include/prolock.h
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Src/nprt_plugin/gecko/1.8/win/include/prolock.h
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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* ***** BEGIN LICENSE BLOCK *****
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* Version: MPL 1.1/GPL 2.0/LGPL 2.1
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*
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* The contents of this file are subject to the Mozilla Public License Version
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* 1.1 (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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* http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
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* for the specific language governing rights and limitations under the
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* License.
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*
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* The Original Code is the Netscape Portable Runtime (NSPR).
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*
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* The Initial Developer of the Original Code is
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* Netscape Communications Corporation.
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* Portions created by the Initial Developer are Copyright (C) 1998-2000
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* the Initial Developer. All Rights Reserved.
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*
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* Contributor(s):
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*
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* Alternatively, the contents of this file may be used under the terms of
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* either the GNU General Public License Version 2 or later (the "GPL"), or
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* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
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* in which case the provisions of the GPL or the LGPL are applicable instead
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* of those above. If you wish to allow use of your version of this file only
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* under the terms of either the GPL or the LGPL, and not to allow others to
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* use your version of this file under the terms of the MPL, indicate your
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* decision by deleting the provisions above and replace them with the notice
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* and other provisions required by the GPL or the LGPL. If you do not delete
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* the provisions above, a recipient may use your version of this file under
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* the terms of any one of the MPL, the GPL or the LGPL.
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*
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* ***** END LICENSE BLOCK ***** */
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#ifndef prolock_h___
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#define prolock_h___
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#include "prtypes.h"
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PR_BEGIN_EXTERN_C
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/*
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** A locking mechanism, built on the existing PRLock definiion,
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** is provided that will permit applications to define a Lock
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** Hierarchy (or Lock Ordering) schema. An application designed
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** using the Ordered Lock functions will terminate with a
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** diagnostic message when a lock inversion condition is
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** detected.
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**
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** The lock ordering detection is complile-time enabled only. in
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** optimized builds of NSPR, the Ordered Lock functions map
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** directly to PRLock functions, providing no lock order
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** detection.
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**
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** The Ordered Lock Facility is compiled in when DEBUG is defined at
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** compile time. Ordered Lock can be forced on in optimized builds by
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** defining FORCE_NSPR_ORDERED_LOCK at compile time. Both the
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** application using Ordered Lock and NSPR must be compiled with the
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** facility enabled to achieve the desired results.
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**
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** Application designers should use the macro interfaces to the Ordered
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** Lock facility to ensure that it is compiled out in optimized builds.
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**
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** Application designers are responsible for defining their own
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** lock hierarchy.
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**
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** Ordered Lock is thread-safe and SMP safe.
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**
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** See Also: prlock.h
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**
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** /lth. 10-Jun-1998.
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**
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*/
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/*
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** Opaque type for ordered lock.
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** ... Don't even think of looking in here.
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**
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*/
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#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
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typedef void * PROrderedLock;
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#else
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/*
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** Map PROrderedLock and methods onto PRLock when ordered locking
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** is not compiled in.
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**
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*/
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#include "prlock.h"
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typedef PRLock PROrderedLock;
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#endif
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/* -----------------------------------------------------------------------
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** FUNCTION: PR_CreateOrderedLock() -- Create an Ordered Lock
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**
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** DESCRIPTION: PR_CreateOrderedLock() creates an ordered lock.
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**
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** INPUTS:
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** order: user defined order of this lock.
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** name: name of the lock. For debugging purposes.
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**
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** OUTPUTS: returned
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**
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** RETURNS: PR_OrderedLock pointer
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**
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** RESTRICTIONS:
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**
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*/
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#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
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#define PR_CREATE_ORDERED_LOCK(order,name)\
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PR_CreateOrderedLock((order),(name))
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#else
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#define PR_CREATE_ORDERED_LOCK(order) PR_NewLock()
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#endif
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NSPR_API(PROrderedLock *)
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PR_CreateOrderedLock(
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PRInt32 order,
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const char *name
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);
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/* -----------------------------------------------------------------------
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** FUNCTION: PR_DestroyOrderedLock() -- Destroy an Ordered Lock
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**
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** DESCRIPTION: PR_DestroyOrderedLock() destroys the ordered lock
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** referenced by lock.
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**
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** INPUTS: lock: pointer to a PROrderedLock
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**
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** OUTPUTS: the lock is destroyed
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**
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** RETURNS: void
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**
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** RESTRICTIONS:
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**
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*/
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#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
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#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyOrderedLock((lock))
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#else
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#define PR_DESTROY_ORDERED_LOCK(lock) PR_DestroyLock((lock))
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#endif
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NSPR_API(void)
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PR_DestroyOrderedLock(
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PROrderedLock *lock
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);
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/* -----------------------------------------------------------------------
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** FUNCTION: PR_LockOrderedLock() -- Lock an ordered lock
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**
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** DESCRIPTION: PR_LockOrderedLock() locks the ordered lock
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** referenced by lock. If the order of lock is less than or equal
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** to the order of the highest lock held by the locking thread,
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** the function asserts.
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**
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** INPUTS: lock: a pointer to a PROrderedLock
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**
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** OUTPUTS: The lock is held or the function asserts.
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**
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** RETURNS: void
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**
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** RESTRICTIONS:
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**
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*/
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#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
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#define PR_LOCK_ORDERED_LOCK(lock) PR_LockOrderedLock((lock))
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#else
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#define PR_LOCK_ORDERED_LOCK(lock) PR_Lock((lock))
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#endif
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NSPR_API(void)
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PR_LockOrderedLock(
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PROrderedLock *lock
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);
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/* -----------------------------------------------------------------------
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** FUNCTION: PR_UnlockOrderedLock() -- unlock and Ordered Lock
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**
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** DESCRIPTION: PR_UnlockOrderedLock() unlocks the lock referenced
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** by lock.
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**
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** INPUTS: lock: a pointer to a PROrderedLock
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**
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** OUTPUTS: the lock is unlocked
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**
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** RETURNS:
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** PR_SUCCESS
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** PR_FAILURE
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**
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** RESTRICTIONS:
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**
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*/
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#if defined(DEBUG) || defined(FORCE_NSPR_ORDERED_LOCKS)
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#define PR_UNLOCK_ORDERED_LOCK(lock) PR_UnlockOrderedLock((lock))
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#else
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#define PR_UNLOCK_ORDERED_LOCK(lock) PR_Unlock((lock))
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#endif
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NSPR_API(PRStatus)
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PR_UnlockOrderedLock(
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PROrderedLock *lock
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);
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PR_END_EXTERN_C
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#endif /* prolock_h___ */
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