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80 lines
2.6 KiB
C
80 lines
2.6 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 Netscape Public License
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* Version 1.1 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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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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PR_EXTERN(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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PR_EXTERN(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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PR_EXTERN(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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PR_EXTERN(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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PR_EXTERN(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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PR_EXTERN(void) PR_CSetOnMonitorRecycle(void (*callback)(void *address));
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PR_END_EXTERN_C
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#endif /* prcmon_h___ */
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