From 26a029d407be480d791972afb5975cf62c9360a6 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Fri, 19 Apr 2024 02:47:55 +0200 Subject: Adding upstream version 124.0.1. Signed-off-by: Daniel Baumann --- xpcom/base/nsIInterfaceRequestorUtils.h | 40 +++++++++++++++++++++++++++++++++ 1 file changed, 40 insertions(+) create mode 100644 xpcom/base/nsIInterfaceRequestorUtils.h (limited to 'xpcom/base/nsIInterfaceRequestorUtils.h') diff --git a/xpcom/base/nsIInterfaceRequestorUtils.h b/xpcom/base/nsIInterfaceRequestorUtils.h new file mode 100644 index 0000000000..c3116ea9f2 --- /dev/null +++ b/xpcom/base/nsIInterfaceRequestorUtils.h @@ -0,0 +1,40 @@ +/* -*- 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 __nsInterfaceRequestorUtils_h +#define __nsInterfaceRequestorUtils_h + +#include "nsCOMPtr.h" + +// a type-safe shortcut for calling the |GetInterface()| member function +// T must inherit from nsIInterfaceRequestor, but the cast may be ambiguous. +template +inline nsresult CallGetInterface(T* aSource, DestinationType** aDestination) { + MOZ_ASSERT(aSource, "null parameter"); + MOZ_ASSERT(aDestination, "null parameter"); + + return aSource->GetInterface(NS_GET_TEMPLATE_IID(DestinationType), + reinterpret_cast(aDestination)); +} + +class MOZ_STACK_CLASS nsGetInterface final : public nsCOMPtr_helper { + public: + nsGetInterface(nsISupports* aSource, nsresult* aError) + : mSource(aSource), mErrorPtr(aError) {} + + virtual nsresult NS_FASTCALL operator()(const nsIID&, void**) const override; + + private: + nsISupports* MOZ_NON_OWNING_REF mSource; + nsresult* mErrorPtr; +}; + +inline const nsGetInterface do_GetInterface(nsISupports* aSource, + nsresult* aError = 0) { + return nsGetInterface(aSource, aError); +} + +#endif // __nsInterfaceRequestorUtils_h -- cgit v1.2.3