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96 lines
3.3 KiB
C
96 lines
3.3 KiB
C
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/*
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* The contents of this file are subject to the Mozilla Public
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* License Version 1.1 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.mozilla.org/MPL/
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*
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* Software distributed under the License is distributed on an "AS
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* IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or
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* implied. See the License for the specific language governing
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* rights and limitations under the 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 Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998-2000 Netscape Communications Corporation. All
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* 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
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* terms of the GNU General Public License Version 2 or later (the
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* "GPL"), in which case the provisions of the GPL are applicable
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* instead of those above. If you wish to allow use of your
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* version of this file only under the terms of the GPL and not to
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* allow others to use your version of this file under the MPL,
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* indicate your decision by deleting the provisions above and
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* replace them with the notice and other provisions required by
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* the GPL. If you do not delete the provisions above, a recipient
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* may use your version of this file under either the MPL or the
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* GPL.
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*/
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#ifndef prcmon_h___
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#define prcmon_h___
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/*
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** Interface to cached monitors. Cached monitors use an address to find a
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** given PR monitor. In this way a monitor can be associated with another
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** object without preallocating a monitor for all objects.
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**
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** A hash table is used to quickly map addresses to individual monitors
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** and the system automatically grows the hash table as needed.
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**
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** Cache monitors are about 5 times slower to use than uncached monitors.
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*/
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#include "prmon.h"
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#include "prinrval.h"
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PR_BEGIN_EXTERN_C
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/**
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** Like PR_EnterMonitor except use the "address" to find a monitor in the
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** monitor cache. If successful, returns the PRMonitor now associated
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** with "address". Note that you must PR_CExitMonitor the address to
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** release the monitor cache entry (otherwise the monitor cache will fill
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** up). This call will return NULL if the monitor cache needs to be
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** expanded and the system is out of memory.
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*/
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NSPR_API(PRMonitor*) PR_CEnterMonitor(void *address);
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/*
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** Like PR_ExitMonitor except use the "address" to find a monitor in the
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** monitor cache.
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*/
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NSPR_API(PRStatus) PR_CExitMonitor(void *address);
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/*
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** Like PR_Wait except use the "address" to find a monitor in the
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** monitor cache.
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*/
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NSPR_API(PRStatus) PR_CWait(void *address, PRIntervalTime timeout);
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/*
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** Like PR_Notify except use the "address" to find a monitor in the
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** monitor cache.
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*/
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NSPR_API(PRStatus) PR_CNotify(void *address);
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/*
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** Like PR_NotifyAll except use the "address" to find a monitor in the
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** monitor cache.
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*/
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NSPR_API(PRStatus) PR_CNotifyAll(void *address);
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/*
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** Set a callback to be invoked each time a monitor is recycled from the cache
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** freelist, with the monitor's cache-key passed in address.
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*/
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NSPR_API(void) PR_CSetOnMonitorRecycle(void (PR_CALLBACK *callback)(void *address));
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PR_END_EXTERN_C
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#endif /* prcmon_h___ */
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