86 lines
2.4 KiB
C++
86 lines
2.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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// IWYU pragma: private, include "nsISupports.h"
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#ifndef nsISupportsBase_h__
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#define nsISupportsBase_h__
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#ifndef nscore_h___
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#include "nscore.h"
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#endif
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#ifndef nsID_h__
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#include "nsID.h"
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#endif
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/*@{*/
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/**
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* IID for the nsISupports interface
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* {00000000-0000-0000-c000-000000000046}
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*
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* To maintain binary compatibility with COM's IUnknown, we define the IID
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* of nsISupports to be the same as that of COM's IUnknown.
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*/
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#define NS_ISUPPORTS_IID \
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{ 0x00000000, 0x0000, 0x0000, \
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{0xc0, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x46} }
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/**
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* Basic component object model interface. Objects which implement
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* this interface support runtime interface discovery (QueryInterface)
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* and a reference counted memory model (AddRef/Release). This is
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* modelled after the win32 IUnknown API.
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*/
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class NS_NO_VTABLE nsISupports
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{
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public:
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NS_DECLARE_STATIC_IID_ACCESSOR(NS_ISUPPORTS_IID)
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/**
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* @name Methods
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*/
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//@{
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/**
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* A run time mechanism for interface discovery.
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* @param aIID [in] A requested interface IID
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* @param aInstancePtr [out] A pointer to an interface pointer to
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* receive the result.
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* @return <b>NS_OK</b> if the interface is supported by the associated
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* instance, <b>NS_NOINTERFACE</b> if it is not.
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*
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* aInstancePtr must not be null.
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*/
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NS_IMETHOD QueryInterface(REFNSIID aIID, void** aInstancePtr) = 0;
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/**
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* Increases the reference count for this interface.
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* The associated instance will not be deleted unless
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* the reference count is returned to zero.
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*
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* @return The resulting reference count.
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*/
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NS_IMETHOD_(MozExternalRefCountType) AddRef(void) = 0;
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/**
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* Decreases the reference count for this interface.
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* Generally, if the reference count returns to zero,
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* the associated instance is deleted.
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*
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* @return The resulting reference count.
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*/
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NS_IMETHOD_(MozExternalRefCountType) Release(void) = 0;
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//@}
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};
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NS_DEFINE_STATIC_IID_ACCESSOR(nsISupports, NS_ISUPPORTS_IID)
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/*@}*/
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#endif
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