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#ifndef nsMemoryImpl_h__
#define nsMemoryImpl_h__

#include "nsMemory.h"
#include "nsISupportsArray.h"
#include "nsIRunnable.h"
#include "nsIThread.h"
#include "nsCOMPtr.h"
#include "plevent.h"

struct PRLock;
class MemoryFlusher;

class nsMemoryImpl : public nsIMemory
{
public:
    NS_DECL_ISUPPORTS
    NS_DECL_NSIMEMORY

    nsMemoryImpl();

    nsresult FlushMemory(const PRUnichar* aReason, PRBool aImmediate);

    // called from xpcom initialization/finalization:
    static nsresult Startup();
    static nsresult Shutdown();

    static NS_METHOD
    Create(nsISupports* outer, const nsIID& aIID, void* *aInstancePtr);

private:
    ~nsMemoryImpl();

protected:
    MemoryFlusher* mFlusher;
    nsCOMPtr<nsIThread> mFlusherThread;

    PRLock* mFlushLock;
    PRBool  mIsFlushing;

    struct FlushEvent {
        PLEvent mEvent;
        const PRUnichar* mReason;
    };

    FlushEvent mFlushEvent;

    static nsresult RunFlushers(nsMemoryImpl* aSelf, const PRUnichar* aReason);

    static void* PR_CALLBACK HandleFlushEvent(PLEvent* aEvent);
    static void  PR_CALLBACK DestroyFlushEvent(PLEvent* aEvent);
};

#endif // nsMemoryImpl_h__