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-rw-r--r--xpcom/base/nsInterfaceRequestorAgg.cpp74
1 files changed, 74 insertions, 0 deletions
diff --git a/xpcom/base/nsInterfaceRequestorAgg.cpp b/xpcom/base/nsInterfaceRequestorAgg.cpp
new file mode 100644
index 0000000000..490341aac2
--- /dev/null
+++ b/xpcom/base/nsInterfaceRequestorAgg.cpp
@@ -0,0 +1,74 @@
+/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* vim: set ts=8 sts=2 et sw=2 tw=80: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "nsInterfaceRequestorAgg.h"
+#include "nsIInterfaceRequestor.h"
+#include "nsCOMPtr.h"
+#include "mozilla/Attributes.h"
+#include "nsThreadUtils.h"
+#include "nsProxyRelease.h"
+
+class nsInterfaceRequestorAgg final : public nsIInterfaceRequestor {
+ public:
+ // XXX This needs to support threadsafe refcounting until we fix bug 243591.
+ NS_DECL_THREADSAFE_ISUPPORTS
+ NS_DECL_NSIINTERFACEREQUESTOR
+
+ nsInterfaceRequestorAgg(nsIInterfaceRequestor* aFirst,
+ nsIInterfaceRequestor* aSecond,
+ nsIEventTarget* aConsumerTarget = nullptr)
+ : mFirst(aFirst), mSecond(aSecond), mConsumerTarget(aConsumerTarget) {
+ if (!mConsumerTarget) {
+ mConsumerTarget = mozilla::GetCurrentSerialEventTarget();
+ }
+ }
+
+ private:
+ ~nsInterfaceRequestorAgg();
+
+ nsCOMPtr<nsIInterfaceRequestor> mFirst, mSecond;
+ nsCOMPtr<nsIEventTarget> mConsumerTarget;
+};
+
+NS_IMPL_ISUPPORTS(nsInterfaceRequestorAgg, nsIInterfaceRequestor)
+
+NS_IMETHODIMP
+nsInterfaceRequestorAgg::GetInterface(const nsIID& aIID, void** aResult) {
+ nsresult rv = NS_ERROR_NO_INTERFACE;
+ if (mFirst) {
+ rv = mFirst->GetInterface(aIID, aResult);
+ }
+ if (mSecond && NS_FAILED(rv)) {
+ rv = mSecond->GetInterface(aIID, aResult);
+ }
+ return rv;
+}
+
+nsInterfaceRequestorAgg::~nsInterfaceRequestorAgg() {
+ NS_ProxyRelease("nsInterfaceRequestorAgg::mFirst", mConsumerTarget,
+ mFirst.forget());
+ NS_ProxyRelease("nsInterfaceRequestorAgg::mSecond", mConsumerTarget,
+ mSecond.forget());
+}
+
+nsresult NS_NewInterfaceRequestorAggregation(nsIInterfaceRequestor* aFirst,
+ nsIInterfaceRequestor* aSecond,
+ nsIInterfaceRequestor** aResult) {
+ *aResult = new nsInterfaceRequestorAgg(aFirst, aSecond);
+
+ NS_ADDREF(*aResult);
+ return NS_OK;
+}
+
+nsresult NS_NewInterfaceRequestorAggregation(nsIInterfaceRequestor* aFirst,
+ nsIInterfaceRequestor* aSecond,
+ nsIEventTarget* aTarget,
+ nsIInterfaceRequestor** aResult) {
+ *aResult = new nsInterfaceRequestorAgg(aFirst, aSecond, aTarget);
+
+ NS_ADDREF(*aResult);
+ return NS_OK;
+}