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lightning-sunbird  0.9+nobinonly
NativeMonitor.cpp
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00001 /* ***** BEGIN LICENSE BLOCK *****
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00036 
00037 /*
00038        NativeMonitor.cpp
00039        
00040        Provides a C++ interface to native monitors.
00041        
00042        by Patrick C. Beard.
00043  */
00044 
00045 #include "NativeMonitor.h"
00046 #include "MRJSession.h"
00047 #include "nsIThreadManager.h"
00048 
00049 NativeMonitor::NativeMonitor(MRJSession* session, nsIThreadManager* manager, void* address)
00050        :      mSession(session), mManager(manager), mAddress(address)
00051 {
00052        if (address == NULL)
00053               mAddress = this;
00054 }
00055 
00056 NativeMonitor::~NativeMonitor() {}
00057 
00058 void NativeMonitor::enter()
00059 {
00060        mManager->EnterMonitor(mAddress);
00061 }
00062 
00063 void NativeMonitor::exit()
00064 {
00065        mManager->ExitMonitor(mAddress);
00066 }
00067 
00068 void NativeMonitor::wait()
00069 {
00070        // this is weird hackery, but we don't want to let the VM be reentered while we wait on a native monitor.
00071        Boolean inJavaThread = (mSession->getMainEnv() != mSession->getCurrentEnv());
00072        if (inJavaThread)
00073               mSession->lock();
00074 
00075        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00076               mManager->Wait(mAddress);
00077               mManager->ExitMonitor(mAddress);
00078        }
00079 
00080        if (inJavaThread)
00081               mSession->unlock();
00082 }
00083 
00084 void NativeMonitor::wait(long long millis)
00085 {
00086        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00087               mManager->Wait(mAddress, PRUint32(millis));
00088               mManager->ExitMonitor(mAddress);
00089        }
00090 }
00091 
00092 void NativeMonitor::notify()
00093 {
00094        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00095               mManager->Notify(mAddress);
00096               mManager->ExitMonitor(mAddress);
00097        }
00098 }
00099 
00100 void NativeMonitor::notifyAll()
00101 {
00102        if (mManager->EnterMonitor(mAddress) == NS_OK) {
00103               mManager->NotifyAll(mAddress);
00104               mManager->ExitMonitor(mAddress);
00105        }
00106 }