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lightning-sunbird  0.9+nobinonly
NativeMonitor.cpp
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00001 /* ***** BEGIN LICENSE BLOCK *****
00002  * Version: MPL 1.1/GPL 2.0/LGPL 2.1
00003  *
00004  * The contents of this file are subject to the Mozilla Public License Version
00005  * 1.1 (the "License"); you may not use this file except in compliance with
00006  * the License. You may obtain a copy of the License at
00007  * http://www.mozilla.org/MPL/
00008  *
00009  * Software distributed under the License is distributed on an "AS IS" basis,
00010  * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
00011  * for the specific language governing rights and limitations under the
00012  * License.
00013  *
00014  * The Original Code is the MRJ Carbon OJI Plugin.
00015  *
00016  * The Initial Developer of the Original Code is
00017  * Netscape Communications Corp.
00018  * Portions created by the Initial Developer are Copyright (C) 2001
00019  * the Initial Developer. All Rights Reserved.
00020  *
00021  * Contributor(s):
00022  *   Patrick C. Beard <beard@netscape.com>
00023  *
00024  * Alternatively, the contents of this file may be used under the terms of
00025  * either of the GNU General Public License Version 2 or later (the "GPL"),
00026  * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
00027  * in which case the provisions of the GPL or the LGPL are applicable instead
00028  * of those above. If you wish to allow use of your version of this file only
00029  * under the terms of either the GPL or the LGPL, and not to allow others to
00030  * use your version of this file under the terms of the MPL, indicate your
00031  * decision by deleting the provisions above and replace them with the notice
00032  * and other provisions required by the GPL or the LGPL. If you do not delete
00033  * the provisions above, a recipient may use your version of this file under
00034  * the terms of any one of the MPL, the GPL or the LGPL.
00035  *
00036  * ***** END LICENSE BLOCK ***** */
00037 
00038 /*
00039        NativeMonitor.cpp
00040        
00041        Provides a C++ interface to native monitors.
00042        
00043        by Patrick C. Beard.
00044  */
00045 
00046 #include "NativeMonitor.h"
00047 #include "MRJSession.h"
00048 #include "nsIThreadManager.h"
00049 
00050 NativeMonitor::NativeMonitor(MRJSession* session, nsIThreadManager* manager, void* address)
00051        :      mSession(session), mManager(manager), mAddress(address)
00052 {
00053        if (address == NULL)
00054               mAddress = this;
00055 }
00056 
00057 NativeMonitor::~NativeMonitor() {}
00058 
00059 void NativeMonitor::enter()
00060 {
00061        mManager->EnterMonitor(mAddress);
00062 }
00063 
00064 void NativeMonitor::exit()
00065 {
00066        mManager->ExitMonitor(mAddress);
00067 }
00068 
00069 void NativeMonitor::wait()
00070 {
00071        // this is weird hackery, but we don't want to let the VM be reentered while we wait on a native monitor.
00072        Boolean inJavaThread = (mSession->getMainEnv() != mSession->getCurrentEnv());
00073        if (inJavaThread)
00074               mSession->lock();
00075 
00076        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00077               mManager->Wait(mAddress);
00078               mManager->ExitMonitor(mAddress);
00079        }
00080 
00081        if (inJavaThread)
00082               mSession->unlock();
00083 }
00084 
00085 void NativeMonitor::wait(long long millis)
00086 {
00087        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00088               mManager->Wait(mAddress, PRUint32(millis));
00089               mManager->ExitMonitor(mAddress);
00090        }
00091 }
00092 
00093 void NativeMonitor::notify()
00094 {
00095        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00096               mManager->Notify(mAddress);
00097               mManager->ExitMonitor(mAddress);
00098        }
00099 }
00100 
00101 void NativeMonitor::notifyAll()
00102 {
00103        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00104               mManager->NotifyAll(mAddress);
00105               mManager->ExitMonitor(mAddress);
00106        }
00107 }