source: vbox/trunk/src/libs/xpcom18a4/xpcom/ds/nsObserverList.h@ 62375

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#ifndef nsObserverList_h___
#define nsObserverList_h___

#include "nsIObserver.h"
#include "nsIEnumerator.h"
#include "nsISupportsArray.h"
#include "nsISimpleEnumerator.h"

class ObserverListEnumerator : public nsISimpleEnumerator
{
public:
    // nsISupports interface
    NS_DECL_ISUPPORTS
    NS_DECL_NSISIMPLEENUMERATOR

    ObserverListEnumerator(nsISupportsArray* aValueArray);

private:
    ~ObserverListEnumerator(void);

protected:
    nsISupportsArray* mValueArray;
    PRInt32 mIndex;
};

class nsObserverList
{
public:
  nsObserverList();
  ~nsObserverList();

  nsresult AddObserver(nsIObserver* anObserver, PRBool ownsWeak);
  nsresult RemoveObserver(nsIObserver* anObserver);
  nsresult GetObserverList(nsISimpleEnumerator** anEnumerator);
     
protected:
  PRLock* mLock;
  nsCOMPtr<nsISupportsArray>  mObserverList;
};


#endif /* nsObserverList_h___ */