1 /* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ 2 /* vim: set ts=8 sts=2 et sw=2 tw=80: */ 3 /* This Source Code Form is subject to the terms of the Mozilla Public 4 * License, v. 2.0. If a copy of the MPL was not distributed with this 5 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ 6 7 #ifndef nsXPTCUtils_h__ 8 #define nsXPTCUtils_h__ 9 10 #include "xptcall.h" 11 #include "mozilla/MemoryReporting.h" 12 13 /** 14 * A helper class that initializes an xptcall helper at construction 15 * and releases it at destruction. 16 */ 17 class nsAutoXPTCStub : protected nsIXPTCProxy 18 { 19 public: 20 nsISomeInterface* mXPTCStub; 21 22 protected: nsAutoXPTCStub()23 nsAutoXPTCStub() : mXPTCStub(nullptr) {} 24 25 nsresult InitStub(const nsIID & aIID)26 InitStub(const nsIID& aIID) 27 { 28 return NS_GetXPTCallStub(aIID, this, &mXPTCStub); 29 } 30 ~nsAutoXPTCStub()31 ~nsAutoXPTCStub() 32 { 33 if (mXPTCStub) { 34 NS_DestroyXPTCallStub(mXPTCStub); 35 } 36 } 37 38 size_t SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf)39 SizeOfExcludingThis(mozilla::MallocSizeOf aMallocSizeOf) const 40 { 41 return mXPTCStub ? NS_SizeOfIncludingThisXPTCallStub(mXPTCStub, aMallocSizeOf) : 0; 42 } 43 }; 44 45 #endif // nsXPTCUtils_h__ 46