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-rw-r--r--src/libs/xpcom18a4/xpcom/glue/nsWeakReference.cpp169
1 files changed, 169 insertions, 0 deletions
diff --git a/src/libs/xpcom18a4/xpcom/glue/nsWeakReference.cpp b/src/libs/xpcom18a4/xpcom/glue/nsWeakReference.cpp
new file mode 100644
index 00000000..76d9f593
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+++ b/src/libs/xpcom18a4/xpcom/glue/nsWeakReference.cpp
@@ -0,0 +1,169 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*-
+ *
+ * ***** BEGIN LICENSE BLOCK *****
+ * Version: MPL 1.1/GPL 2.0/LGPL 2.1
+ *
+ * The contents of this file are subject to the Mozilla Public License Version
+ * 1.1 (the "License"); you may not use this file except in compliance with
+ * the License. You may obtain a copy of the License at
+ * http://www.mozilla.org/MPL/
+ *
+ * Software distributed under the License is distributed on an "AS IS" basis,
+ * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
+ * for the specific language governing rights and limitations under the
+ * License.
+ *
+ * The Original Code is the Mozilla browser.
+ *
+ * The Initial Developer of the Original Code is
+ * Netscape Communications, Inc.
+ * Portions created by the Initial Developer are Copyright (C) 1999
+ * the Initial Developer. All Rights Reserved.
+ *
+ * Contributor(s):
+ * Scott Collins <scc@netscape.com>
+ * Pierre Phaneuf <pp@ludusdesign.com>
+ *
+ * Alternatively, the contents of this file may be used under the terms of
+ * either of the GNU General Public License Version 2 or later (the "GPL"),
+ * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
+ * in which case the provisions of the GPL or the LGPL are applicable instead
+ * of those above. If you wish to allow use of your version of this file only
+ * under the terms of either the GPL or the LGPL, and not to allow others to
+ * use your version of this file under the terms of the MPL, indicate your
+ * decision by deleting the provisions above and replace them with the notice
+ * and other provisions required by the GPL or the LGPL. If you do not delete
+ * the provisions above, a recipient may use your version of this file under
+ * the terms of any one of the MPL, the GPL or the LGPL.
+ *
+ * ***** END LICENSE BLOCK ***** */
+
+// nsWeakReference.cpp
+
+#include "nsWeakReference.h"
+#include "nsCOMPtr.h"
+
+nsresult
+nsQueryReferent::operator()( const nsIID& aIID, void** answer ) const
+ {
+ nsresult status;
+ if ( mWeakPtr )
+ {
+ if ( NS_FAILED(status = mWeakPtr->QueryReferent(aIID, answer)) )
+ *answer = 0;
+ }
+ else
+ status = NS_ERROR_NULL_POINTER;
+
+ if ( mErrorPtr )
+ *mErrorPtr = status;
+ return status;
+ }
+
+nsresult
+nsGetWeakReference::operator()( const nsIID&, void** aResult ) const
+ {
+ nsresult status;
+ // nsIWeakReference** result = &NS_STATIC_CAST(nsIWeakReference*, *aResult);
+ *aResult = 0;
+
+ if ( mRawPtr )
+ {
+ nsCOMPtr<nsISupportsWeakReference> factoryPtr = do_QueryInterface(mRawPtr, &status);
+ NS_ASSERTION(factoryPtr, "Oops! You're asking for a weak reference to an object that doesn't support that.");
+ if ( factoryPtr )
+ {
+ nsIWeakReference* temp;
+ status = factoryPtr->GetWeakReference(&temp);
+ *aResult = temp;
+ }
+ // else, |status| has already been set by |do_QueryInterface|
+ }
+ else
+ status = NS_ERROR_NULL_POINTER;
+
+ if ( mErrorPtr )
+ *mErrorPtr = status;
+ return status;
+ }
+
+
+NS_COM nsIWeakReference* // or else |already_AddRefed<nsIWeakReference>|
+NS_GetWeakReference( nsISupports* aInstancePtr, nsresult* aErrorPtr )
+ {
+ void* result = 0;
+ nsGetWeakReference(aInstancePtr, aErrorPtr)(NS_GET_IID(nsIWeakReference), &result);
+ return NS_STATIC_CAST(nsIWeakReference*, result);
+ }
+
+NS_COM nsresult
+nsSupportsWeakReference::GetWeakReference( nsIWeakReference** aInstancePtr )
+ {
+ if ( !aInstancePtr )
+ return NS_ERROR_NULL_POINTER;
+
+ if ( !mProxy )
+ mProxy = new nsWeakReference(this);
+ *aInstancePtr = mProxy;
+
+ nsresult status;
+ if ( !*aInstancePtr )
+ status = NS_ERROR_OUT_OF_MEMORY;
+ else
+ {
+ NS_ADDREF(*aInstancePtr);
+ status = NS_OK;
+ }
+
+ return status;
+ }
+
+NS_IMETHODIMP_(nsrefcnt)
+nsWeakReference::AddRef()
+ {
+ return ++mRefCount;
+ }
+
+NS_IMETHODIMP_(nsrefcnt)
+nsWeakReference::Release()
+ {
+ nsrefcnt temp = --mRefCount;
+ if ( !mRefCount )
+ delete this;
+ return temp;
+ }
+
+NS_IMETHODIMP
+nsWeakReference::QueryInterface( const nsIID& aIID, void** aInstancePtr )
+ {
+ NS_ASSERTION(aInstancePtr, "QueryInterface requires a non-NULL destination!");
+
+ if ( !aInstancePtr )
+ return NS_ERROR_NULL_POINTER;
+
+ nsISupports* foundInterface;
+ if ( aIID.Equals(NS_GET_IID(nsIWeakReference)) )
+ foundInterface = NS_STATIC_CAST(nsIWeakReference*, this);
+ else if ( aIID.Equals(NS_GET_IID(nsISupports)) )
+ foundInterface = NS_STATIC_CAST(nsISupports*, this);
+ else
+ foundInterface = 0;
+
+ nsresult status;
+ if ( !foundInterface )
+ status = NS_NOINTERFACE;
+ else
+ {
+ NS_ADDREF(foundInterface);
+ status = NS_OK;
+ }
+
+ *aInstancePtr = foundInterface;
+ return status;
+ }
+
+NS_IMETHODIMP
+nsWeakReference::QueryReferent( const nsIID& aIID, void** aInstancePtr )
+ {
+ return mReferent ? mReferent->QueryInterface(aIID, aInstancePtr) : NS_ERROR_NULL_POINTER;
+ }