Adding upstream version 110.0.1.upstream/110.0.1upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 170 insertions, 0 deletions

diff --git a/xpcom/components/nsComponentManagerUtils.h b/xpcom/components/nsComponentManagerUtils.h
new file mode 100644
index 0000000000..b6f15aabaa
--- /dev/null
+++ b/xpcom/components/nsComponentManagerUtils.h
@@ -0,0 +1,170 @@
+/* -*- 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/. */
+
+#ifndef nsComponentManagerUtils_h__
+#define nsComponentManagerUtils_h__
+
+#include "nscore.h"
+#include "nsCOMPtr.h"
+
+#include "nsIFactory.h"
+
+nsresult CallCreateInstance(const nsCID& aCID, const nsIID& aIID,
+                            void** aResult);
+
+nsresult CallCreateInstance(const char* aContractID, const nsIID& aIID,
+                            void** aResult);
+
+nsresult CallGetClassObject(const nsCID& aCID, const nsIID& aIID,
+                            void** aResult);
+
+nsresult CallGetClassObject(const char* aContractID, const nsIID& aIID,
+                            void** aResult);
+
+class MOZ_STACK_CLASS nsCreateInstanceByCID final : public nsCOMPtr_helper {
+ public:
+  nsCreateInstanceByCID(const nsCID& aCID, nsresult* aErrorPtr)
+      : mCID(aCID), mErrorPtr(aErrorPtr) {}
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+  const nsCID& mCID;
+  nsresult* mErrorPtr;
+};
+
+class MOZ_STACK_CLASS nsCreateInstanceByContractID final
+    : public nsCOMPtr_helper {
+ public:
+  nsCreateInstanceByContractID(const char* aContractID, nsresult* aErrorPtr)
+      : mContractID(aContractID), mErrorPtr(aErrorPtr) {}
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+  const char* mContractID;
+  nsresult* mErrorPtr;
+};
+
+class MOZ_STACK_CLASS nsCreateInstanceFromFactory final
+    : public nsCOMPtr_helper {
+ public:
+  nsCreateInstanceFromFactory(nsIFactory* aFactory, nsresult* aErrorPtr)
+      : mFactory(aFactory), mErrorPtr(aErrorPtr) {}
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+  nsIFactory* MOZ_NON_OWNING_REF mFactory;
+  nsresult* mErrorPtr;
+};
+
+inline const nsCreateInstanceByCID do_CreateInstance(const nsCID& aCID,
+                                                     nsresult* aError = 0) {
+  return nsCreateInstanceByCID(aCID, aError);
+}
+
+inline const nsCreateInstanceByContractID do_CreateInstance(
+    const char* aContractID, nsresult* aError = 0) {
+  return nsCreateInstanceByContractID(aContractID, aError);
+}
+
+inline const nsCreateInstanceFromFactory do_CreateInstance(
+    nsIFactory* aFactory, nsresult* aError = 0) {
+  return nsCreateInstanceFromFactory(aFactory, aError);
+}
+
+class MOZ_STACK_CLASS nsGetClassObjectByCID final : public nsCOMPtr_helper {
+ public:
+  nsGetClassObjectByCID(const nsCID& aCID, nsresult* aErrorPtr)
+      : mCID(aCID), mErrorPtr(aErrorPtr) {}
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+  const nsCID& mCID;
+  nsresult* mErrorPtr;
+};
+
+class MOZ_STACK_CLASS nsGetClassObjectByContractID final
+    : public nsCOMPtr_helper {
+ public:
+  nsGetClassObjectByContractID(const char* aContractID, nsresult* aErrorPtr)
+      : mContractID(aContractID), mErrorPtr(aErrorPtr) {}
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override;
+
+ private:
+  const char* mContractID;
+  nsresult* mErrorPtr;
+};
+
+/**
+ * do_GetClassObject can be used to improve performance of callers
+ * that call |CreateInstance| many times.  They can cache the factory
+ * and call do_CreateInstance or CallCreateInstance with the cached
+ * factory rather than having the component manager retrieve it every
+ * time.
+ */
+inline const nsGetClassObjectByCID do_GetClassObject(const nsCID& aCID,
+                                                     nsresult* aError = 0) {
+  return nsGetClassObjectByCID(aCID, aError);
+}
+
+inline const nsGetClassObjectByContractID do_GetClassObject(
+    const char* aContractID, nsresult* aError = 0) {
+  return nsGetClassObjectByContractID(aContractID, aError);
+}
+
+// type-safe shortcuts for calling |CreateInstance|
+template <class DestinationType>
+inline nsresult CallCreateInstance(const nsCID& aClass,
+                                   DestinationType** aDestination) {
+  MOZ_ASSERT(aDestination, "null parameter");
+
+  return CallCreateInstance(aClass, NS_GET_TEMPLATE_IID(DestinationType),
+                            reinterpret_cast<void**>(aDestination));
+}
+
+template <class DestinationType>
+inline nsresult CallCreateInstance(const char* aContractID,
+                                   DestinationType** aDestination) {
+  MOZ_ASSERT(aContractID, "null parameter");
+  MOZ_ASSERT(aDestination, "null parameter");
+
+  return CallCreateInstance(aContractID, NS_GET_TEMPLATE_IID(DestinationType),
+                            reinterpret_cast<void**>(aDestination));
+}
+
+template <class DestinationType>
+inline nsresult CallCreateInstance(nsIFactory* aFactory,
+                                   DestinationType** aDestination) {
+  MOZ_ASSERT(aFactory, "null parameter");
+  MOZ_ASSERT(aDestination, "null parameter");
+
+  return aFactory->CreateInstance(nullptr, NS_GET_TEMPLATE_IID(DestinationType),
+                                  reinterpret_cast<void**>(aDestination));
+}
+
+template <class DestinationType>
+inline nsresult CallGetClassObject(const nsCID& aClass,
+                                   DestinationType** aDestination) {
+  MOZ_ASSERT(aDestination, "null parameter");
+
+  return CallGetClassObject(aClass, NS_GET_TEMPLATE_IID(DestinationType),
+                            reinterpret_cast<void**>(aDestination));
+}
+
+template <class DestinationType>
+inline nsresult CallGetClassObject(const char* aContractID,
+                                   DestinationType** aDestination) {
+  MOZ_ASSERT(aDestination, "null parameter");
+
+  return CallGetClassObject(aContractID, NS_GET_TEMPLATE_IID(DestinationType),
+                            reinterpret_cast<void**>(aDestination));
+}
+
+#endif /* nsComponentManagerUtils_h__ */