STMemoryManager.h

/******************************************************************************

	File: STMemoryManager.h

	Description:

	VM representation of Smalltalk MemoryManager class.

	N.B. The class here defined is well known to the VM, and must not
	be modified in the image. Note also that this class may also have
	a representation in the assembler modules (so see istasm.inc)

******************************************************************************/
#pragma once

#include "STObject.h"
#include "STProcess.h"

namespace ST
{
	class MemoryManager //: public Object
	{
	public:
		ProcessOTE* m_finalizer;		// Finalization process
		SemaphoreOTE* m_lastRequests;	// Semaphore to signal objects requiring finalization are waiting
		OTE* m_hospice;					// Finalization queue (home for dying objects)
		Oop	 m_hospiceHighWater;		// High water level for hospice
		Oop  m_maxObjects;				// Implied by OT virtual memory reservation
		ProcessOTE* m_undertaker;		// Undertaker process sends #elementsExpired: messages to bereaved
		SemaphoreOTE* m_bereavements;	// Semaphore to signal bereaved queue not empty
		OTE* m_bereaved;				// Queue of bereaved weaklings
		OTE* m_bereavedHighWater;		// High water level for bereavement queue
		Oop	 m_gcInterval;				// Interval (mS) before next idle GC
		OTE* m_lastGCTime;				// Millisecond clock at last GC (32-bit DWORD)
		Oop	 m_lastGCDuration;			// mS to perform last GC
		Oop	 m_objectHeaderSize;		// Size in bytes of object header (as SmallInteger)
	};
}

typedef TOTE<ST::MemoryManager> MemManOTE;