1 files changed, 94 insertions, 0 deletions
diff --git a/xpcom/glue/nsServiceManagerUtils.h b/xpcom/glue/nsServiceManagerUtils.h
new file mode 100644
index 000000000..d1ea408a2
--- /dev/null
+++ b/xpcom/glue/nsServiceManagerUtils.h
@@ -0,0 +1,94 @@
+/* -*- 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 nsServiceManagerUtils_h__
+#define nsServiceManagerUtils_h__
+
+#include "nsIServiceManager.h"
+#include "nsCOMPtr.h"
+
+inline const nsGetServiceByCID
+do_GetService(const nsCID& aCID)
+{
+  return nsGetServiceByCID(aCID);
+}
+
+inline const nsGetServiceByCIDWithError
+do_GetService(const nsCID& aCID, nsresult* aError)
+{
+  return nsGetServiceByCIDWithError(aCID, aError);
+}
+
+inline const nsGetServiceByContractID
+do_GetService(const char* aContractID)
+{
+  return nsGetServiceByContractID(aContractID);
+}
+
+inline const nsGetServiceByContractIDWithError
+do_GetService(const char* aContractID, nsresult* aError)
+{
+  return nsGetServiceByContractIDWithError(aContractID, aError);
+}
+
+class MOZ_STACK_CLASS nsGetServiceFromCategory final : public nsCOMPtr_helper
+{
+public:
+  nsGetServiceFromCategory(const char* aCategory, const char* aEntry,
+                           nsresult* aErrorPtr)
+    : mCategory(aCategory)
+    , mEntry(aEntry)
+    , mErrorPtr(aErrorPtr)
+  {
+  }
+
+  virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const
+    override;
+protected:
+  const char*                 mCategory;
+  const char*                 mEntry;
+  nsresult*                   mErrorPtr;
+};
+
+inline const nsGetServiceFromCategory
+do_GetServiceFromCategory(const char* aCategory, const char* aEntry,
+                          nsresult* aError = 0)
+{
+  return nsGetServiceFromCategory(aCategory, aEntry, aError);
+}
+
+nsresult CallGetService(const nsCID& aClass, const nsIID& aIID, void** aResult);
+
+nsresult CallGetService(const char* aContractID, const nsIID& aIID,
+                        void** aResult);
+
+// type-safe shortcuts for calling |GetService|
+template<class DestinationType>
+inline nsresult
+CallGetService(const nsCID& aClass,
+               DestinationType** aDestination)
+{
+  NS_PRECONDITION(aDestination, "null parameter");
+
+  return CallGetService(aClass,
+                        NS_GET_TEMPLATE_IID(DestinationType),
+                        reinterpret_cast<void**>(aDestination));
+}
+
+template<class DestinationType>
+inline nsresult
+CallGetService(const char* aContractID,
+               DestinationType** aDestination)
+{
+  NS_PRECONDITION(aContractID, "null parameter");
+  NS_PRECONDITION(aDestination, "null parameter");
+
+  return CallGetService(aContractID,
+                        NS_GET_TEMPLATE_IID(DestinationType),
+                        reinterpret_cast<void**>(aDestination));
+}
+
+#endif