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| 1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ | |
| 2 /* | |
| 3 * The contents of this file are subject to the Mozilla Public | |
| 4 * License Version 1.1 (the "License"); you may not use this file | |
| 5 * except in compliance with the License. You may obtain a copy of | |
| 6 * the License at http://www.mozilla.org/MPL/ | |
| 7 * | |
| 8 * Software distributed under the License is distributed on an "AS | |
| 9 * IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or | |
| 10 * implied. See the License for the specific language governing | |
| 11 * rights and limitations under the License. | |
| 12 * | |
| 13 * The Original Code is the Netscape Portable Runtime (NSPR). | |
| 14 * | |
| 15 * The Initial Developer of the Original Code is Netscape | |
| 16 * Communications Corporation. Portions created by Netscape are | |
| 17 * Copyright (C) 1998-2000 Netscape Communications Corporation. All | |
| 18 * Rights Reserved. | |
| 19 * | |
| 20 * Contributor(s): | |
| 21 * | |
| 22 * Alternatively, the contents of this file may be used under the | |
| 23 * terms of the GNU General Public License Version 2 or later (the | |
| 24 * "GPL"), in which case the provisions of the GPL are applicable | |
| 25 * instead of those above. If you wish to allow use of your | |
| 26 * version of this file only under the terms of the GPL and not to | |
| 27 * allow others to use your version of this file under the MPL, | |
| 28 * indicate your decision by deleting the provisions above and | |
| 29 * replace them with the notice and other provisions required by | |
| 30 * the GPL. If you do not delete the provisions above, a recipient | |
| 31 * may use your version of this file under either the MPL or the | |
| 32 * GPL. | |
| 33 */ | |
| 34 | |
| 35 #ifndef prcmon_h___ | |
| 36 #define prcmon_h___ | |
| 37 | |
| 38 /* | |
| 39 ** Interface to cached monitors. Cached monitors use an address to find a | |
| 40 ** given PR monitor. In this way a monitor can be associated with another | |
| 41 ** object without preallocating a monitor for all objects. | |
| 42 ** | |
| 43 ** A hash table is used to quickly map addresses to individual monitors | |
| 44 ** and the system automatically grows the hash table as needed. | |
| 45 ** | |
| 46 ** Cache monitors are about 5 times slower to use than uncached monitors. | |
| 47 */ | |
| 48 #include "prmon.h" | |
| 49 #include "prinrval.h" | |
| 50 | |
| 51 PR_BEGIN_EXTERN_C | |
| 52 | |
| 53 /** | |
| 54 ** Like PR_EnterMonitor except use the "address" to find a monitor in the | |
| 55 ** monitor cache. If successful, returns the PRMonitor now associated | |
| 56 ** with "address". Note that you must PR_CExitMonitor the address to | |
| 57 ** release the monitor cache entry (otherwise the monitor cache will fill | |
| 58 ** up). This call will return NULL if the monitor cache needs to be | |
| 59 ** expanded and the system is out of memory. | |
| 60 */ | |
| 61 NSPR_API(PRMonitor*) PR_CEnterMonitor(void *address); | |
| 62 | |
| 63 /* | |
| 64 ** Like PR_ExitMonitor except use the "address" to find a monitor in the | |
| 65 ** monitor cache. | |
| 66 */ | |
| 67 NSPR_API(PRStatus) PR_CExitMonitor(void *address); | |
| 68 | |
| 69 /* | |
| 70 ** Like PR_Wait except use the "address" to find a monitor in the | |
| 71 ** monitor cache. | |
| 72 */ | |
| 73 NSPR_API(PRStatus) PR_CWait(void *address, PRIntervalTime timeout); | |
| 74 | |
| 75 /* | |
| 76 ** Like PR_Notify except use the "address" to find a monitor in the | |
| 77 ** monitor cache. | |
| 78 */ | |
| 79 NSPR_API(PRStatus) PR_CNotify(void *address); | |
| 80 | |
| 81 /* | |
| 82 ** Like PR_NotifyAll except use the "address" to find a monitor in the | |
| 83 ** monitor cache. | |
| 84 */ | |
| 85 NSPR_API(PRStatus) PR_CNotifyAll(void *address); | |
| 86 | |
| 87 /* | |
| 88 ** Set a callback to be invoked each time a monitor is recycled from the cache | |
| 89 ** freelist, with the monitor's cache-key passed in address. | |
| 90 */ | |
| 91 NSPR_API(void) PR_CSetOnMonitorRecycle(void (PR_CALLBACK *callback)(void *addres
s)); | |
| 92 | |
| 93 PR_END_EXTERN_C | |
| 94 | |
| 95 #endif /* prcmon_h___ */ | |
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