зеркало из https://github.com/mozilla/gecko-dev.git
87 строки
1.7 KiB
C++
87 строки
1.7 KiB
C++
// nsWeakReference.cpp
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#include "nsWeakReference.h"
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nsIWeakReference*
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NS_GetWeakReference( nsISupports* aInstance, nsresult* aResult )
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{
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nsresult status;
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if ( !aResult )
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aResult = &status;
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nsCOMPtr<nsISupportsWeakReference> factoryP = do_QueryInterface(aInstance, aResult);
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nsIWeakReference* weakP = 0;
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if ( factoryP )
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status = factoryP->GetWeakReference(&weakP);
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return weakP;
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}
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nsresult
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nsSupportsWeakReference::GetWeakReference( nsIWeakReference** aInstancePtr )
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{
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if ( !aInstancePtr )
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return NS_ERROR_NULL_POINTER;
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if ( !mProxy )
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mProxy = new nsWeakReference(this);
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*aInstancePtr = mProxy;
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nsresult status;
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if ( !*aInstancePtr )
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status = NS_NOINTERFACE;
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else
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{
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NS_ADDREF(*aInstancePtr);
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status = NS_OK;
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}
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return status;
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}
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nsrefcnt
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nsWeakReference::AddRef()
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{
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return ++mRefCount;
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}
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nsrefcnt
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nsWeakReference::Release()
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{
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nsrefcnt temp = --mRefCount;
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if ( !mRefCount )
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delete this;
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return temp;
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}
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nsresult
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nsWeakReference::QueryInterface( const nsIID& aIID, void** aInstancePtr )
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{
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if ( !aInstancePtr )
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return NS_ERROR_NULL_POINTER;
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if ( aIID.Equals(nsCOMTypeInfo<nsIWeakReference>::GetIID()) )
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*aInstancePtr = NS_STATIC_CAST(nsIWeakReference*, this);
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else if ( aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID()) )
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*aInstancePtr = NS_STATIC_CAST(nsISupports*, this);
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else
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*aInstancePtr = 0;
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nsresult status;
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if ( !*aInstancePtr )
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status = NS_NOINTERFACE;
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else
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{
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NS_ADDREF( NS_REINTERPRET_CAST(nsISupports*, *aInstancePtr) );
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status = NS_OK;
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}
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return status;
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}
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nsresult
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nsWeakReference::QueryReference( const nsIID& aIID, void** aInstancePtr )
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{
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return mReferent ? mReferent->QueryInterface(aIID, aInstancePtr) : NS_ERROR_NULL_POINTER;
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}
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