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// Licensed to the .NET Foundation under one or more agreements.
// The .NET Foundation licenses this file to you under the MIT license.
// See the LICENSE file in the project root for more information.
// ===========================================================================
#ifndef _FINALIZER_THREAD_H_
#define _FINALIZER_THREAD_H_
class FinalizerThread
{
static BOOL fQuitFinalizer;
#if defined(__linux__) && defined(FEATURE_EVENT_TRACE)
static ULONGLONG LastHeapDumpTime;
#endif
static CLREvent *hEventFinalizer;
static CLREvent *hEventFinalizerDone;
static CLREvent *hEventFinalizerToShutDown;
// Note: This enum makes it easier to read much of the code that deals with the
// array of events that the finalizer thread waits on. However, the ordering
// is important.
// See code:SVR::WaitForFinalizerEvent#MHandleTypeValues for more info
enum MHandleType
{
kLowMemoryNotification = 0,
kFinalizer = 1,
kHandleCount,
};
static HANDLE MHandles[kHandleCount];
static void WaitForFinalizerEvent (CLREvent *event);
static void DoOneFinalization(Object* fobj, Thread* pThread);
static void FinalizeAllObjects(int bitToCheck);
public:
static Thread* GetFinalizerThread()
{
LIMITED_METHOD_CONTRACT;
_ASSERTE(g_pFinalizerThread != 0);
return g_pFinalizerThread;
}
static BOOL IsCurrentThreadFinalizer();
static void EnableFinalization();
static BOOL HaveExtraWorkForFinalizer();
static void RaiseShutdownEvents()
{
WRAPPER_NO_CONTRACT;
fQuitFinalizer = TRUE;
EnableFinalization();
// Do not wait for FinalizerThread if the current one is FinalizerThread.
if (GetThread() != GetFinalizerThread())
{
// This wait must be alertable to handle cases where the current
// thread's context is needed (i.e. RCW cleanup)
hEventFinalizerToShutDown->Wait(INFINITE, /*alertable*/ TRUE);
}
}
static void FinalizerThreadWait(DWORD timeout = INFINITE);
// We wake up a wait for finaliation for two reasons:
// if fFinalizer=TRUE, we have finished finalization.
// if fFinalizer=FALSE, the timeout for finalization is changed, and AD unload helper thread is notified.
static void SignalFinalizationDone(BOOL fFinalizer);
static VOID FinalizerThreadWorker(void *args);
static DWORD WINAPI FinalizerThreadStart(void *args);
static void FinalizerThreadCreate();
};
#endif // _FINALIZER_THREAD_H_
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