mirror of
https://github.com/mozilla/gecko-dev.git
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b5c49d66b9
- Use if statements rather than ?: with 0 "else part" after the : in macros whose bodies are statements anyway (and already protected by PR_BEGIN_MACRO and PR_END_MACRO). - Such if statements test for non-null pointers, so the subsequent statements to null those pointers can move into the then parts -- there's no point in setting a null pointer to null again.
749 lines
30 KiB
C++
749 lines
30 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*-
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*
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* The contents of this file are subject to the Netscape Public License
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* Version 1.0 (the "NPL"); you may not use this file except in
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* compliance with the NPL. You may obtain a copy of the NPL at
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* http://www.mozilla.org/NPL/
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*
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* Software distributed under the NPL is distributed on an "AS IS" basis,
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* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
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* for the specific language governing rights and limitations under the
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* NPL.
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*
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* The Initial Developer of this code under the NPL is Netscape
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* Communications Corporation. Portions created by Netscape are
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* Copyright (C) 1998 Netscape Communications Corporation. All Rights
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* Reserved.
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*/
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#ifndef __nsISupportsUtils_h
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#define __nsISupportsUtils_h
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/***************************************************************************/
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/* this section copied from the hand written nsISupports.h */
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#include "nsDebug.h"
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#include "nsID.h"
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#include "nsIID.h"
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#include "nsError.h"
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#include "pratom.h" /* needed for PR_AtomicIncrement and PR_AtomicDecrement */
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#if defined(NS_MT_SUPPORTED)
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#include "prcmon.h"
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#endif /* NS_MT_SUPPORTED */
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// under Metrowerks (Mac), we don't have autoconf yet
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#ifdef __MWERKS__
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#define HAVE_CPP_SPECIALIZATION
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#endif
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// under VC++ (Windows), we don't have autoconf yet
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#if defined(_MSC_VER) && (_MSC_VER>=1100)
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// VC++ 5.0 and greater implement template specialization, 4.2 is unknown
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#define HAVE_CPP_SPECIALIZATION
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#endif
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#ifdef HAVE_CPP_SPECIALIZATION
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#define NSCAP_FEATURE_HIDE_NSISUPPORTS_GETIID
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#endif
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/*@{*/
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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 nsIUnknown, we define the IID
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* of nsISupports to be the same as that of COM's nsIUnknown.
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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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* Reference count values
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*
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* This is type of return value from Addref() and Release() in nsISupports.
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* nsIUnknown of COM returns a unsigned long from equivalent functions.
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* To maintain binary compatibility of nsISupports with nsIUnknown, we are
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* doing this ifdeffing.
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*/
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#if defined(XP_PC) && PR_BYTES_PER_LONG == 4
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typedef unsigned long nsrefcnt;
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#else
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typedef PRUint32 nsrefcnt;
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#endif
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#include "nsTraceRefcnt.h"
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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 nsISupports {
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public:
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#ifndef NSCAP_FEATURE_HIDE_NSISUPPORTS_GETIID
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static const nsIID& GetIID() { static nsIID iid = NS_ISUPPORTS_IID; return iid; }
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#endif
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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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* <b>NS_ERROR_INVALID_POINTER</b> if <i>aInstancePtr</i> is <b>NULL</b>.
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*/
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NS_IMETHOD QueryInterface(REFNSIID aIID,
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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_(nsrefcnt) 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_(nsrefcnt) Release(void) = 0;
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//@}
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};
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/*@}*/
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/***************************************************************************/
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/**
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* A macro to build the static const IID accessor method
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*/
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#define NS_DEFINE_STATIC_IID_ACCESSOR(the_iid) \
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static const nsIID& GetIID() {static nsIID iid = the_iid; return iid;}
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/**
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* A macro to build the static const CID accessor method
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*/
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#define NS_DEFINE_STATIC_CID_ACCESSOR(the_cid) \
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static const nsID& GetCID() {static nsID cid = the_cid; return cid;}
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/**
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* Some convenience macros for implementing AddRef and Release
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*/
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/**
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* Declare the reference count variable and the implementations of the
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* AddRef and QueryInterface methods.
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*/
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#define NS_DECL_ISUPPORTS \
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public: \
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NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(nsrefcnt) AddRef(void); \
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NS_IMETHOD_(nsrefcnt) Release(void); \
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protected: \
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nsrefcnt mRefCnt; \
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public:
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#define NS_DECL_ISUPPORTS_EXPORTED \
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public: \
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NS_EXPORT NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_EXPORT NS_IMETHOD_(nsrefcnt) AddRef(void); \
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NS_EXPORT NS_IMETHOD_(nsrefcnt) Release(void); \
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protected: \
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nsrefcnt mRefCnt; \
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public:
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////////////////////////////////////////////////////////////////////////////////
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/**
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* Initialize the reference count variable. Add this to each and every
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* constructor you implement.
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*/
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#define NS_INIT_REFCNT() mRefCnt = 0
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#define NS_INIT_ISUPPORTS() NS_INIT_REFCNT() // what it should have been called in the first place
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/**
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* Use this macro to implement the AddRef method for a given <i>_class</i>
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* @param _class The name of the class implementing the method
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*/
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#define NS_IMPL_ADDREF(_class) \
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NS_IMETHODIMP_(nsrefcnt) _class::AddRef(void) \
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{ \
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NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt"); \
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++mRefCnt; \
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NS_LOG_ADDREF(this, mRefCnt, __FILE__, __LINE__); \
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return mRefCnt; \
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}
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/**
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* Use this macro to implement the Release method for a given <i>_class</i>
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* @param _class The name of the class implementing the method
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*/
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#define NS_IMPL_RELEASE(_class) \
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NS_IMETHODIMP_(nsrefcnt) _class::Release(void) \
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{ \
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NS_PRECONDITION(0 != mRefCnt, "dup release"); \
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--mRefCnt; \
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NS_LOG_RELEASE(this, mRefCnt, __FILE__, __LINE__); \
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if (mRefCnt == 0) { \
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NS_DELETEXPCOM(this); \
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return 0; \
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} \
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return mRefCnt; \
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}
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////////////////////////////////////////////////////////////////////////////////
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/*
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* Some convenience macros for implementing QueryInterface
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*/
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/**
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* This implements query interface with two assumptions: First, the
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* class in question implements nsISupports and its own interface and
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* nothing else. Second, the implementation of the class's primary
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* inheritance chain leads to its own interface.
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*
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* @param _class The name of the class implementing the method
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* @param _classiiddef The name of the #define symbol that defines the IID
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* for the class (e.g. NS_ISUPPORTS_IID)
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*/
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#define NS_IMPL_QUERY_INTERFACE(_class,_classiiddef) \
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NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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if (NULL == aInstancePtr) { \
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return NS_ERROR_NULL_POINTER; \
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} \
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\
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*aInstancePtr = NULL; \
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\
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static NS_DEFINE_IID(kClassIID, _classiiddef); \
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if (aIID.Equals(kClassIID)) { \
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*aInstancePtr = (void*) this; \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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if (aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID())) { \
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*aInstancePtr = (void*) ((nsISupports*)this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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return NS_NOINTERFACE; \
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}
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#define NS_IMPL_QUERY_INTERFACE2(_class, _c1, _c2) \
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NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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if (NULL == aInstancePtr) { \
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return NS_ERROR_NULL_POINTER; \
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} \
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\
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*aInstancePtr = NULL; \
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\
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if (aIID.Equals(nsCOMTypeInfo<_c1>::GetIID())) { \
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*aInstancePtr = (void*) ((_c1*)this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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if (aIID.Equals(nsCOMTypeInfo<_c2>::GetIID())) { \
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*aInstancePtr = (void*) ((_c2*)this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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if (aIID.Equals(nsCOMTypeInfo<nsISupports>::GetIID())) { \
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*aInstancePtr = (void*) ((_c1*)this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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return NS_NOINTERFACE; \
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}
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/**
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* Convenience macro for implementing all nsISupports methods for
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* a simple class.
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* @param _class The name of the class implementing the method
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* @param _classiiddef The name of the #define symbol that defines the IID
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* for the class (e.g. NS_ISUPPORTS_IID)
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*/
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#define NS_IMPL_ISUPPORTS(_class,_classiiddef) \
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NS_IMPL_ADDREF(_class) \
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NS_IMPL_RELEASE(_class) \
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NS_IMPL_QUERY_INTERFACE(_class,_classiiddef)
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#define NS_IMPL_ISUPPORTS2(_class, _c1, _c2) \
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NS_IMPL_ADDREF(_class) \
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NS_IMPL_RELEASE(_class) \
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NS_IMPL_QUERY_INTERFACE2(_class, _c1, _c2)
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////////////////////////////////////////////////////////////////////////////////
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/**
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* Declare that you're going to inherit from something that already
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* implements nsISupports, but also implements an additional interface, thus
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* causing an ambiguity. In this case you don't need another mRefCnt, you
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* just need to forward the definitions to the appropriate superclass. E.g.
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*
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* class Bar : public Foo, public nsIBar { // both provide nsISupports
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* public:
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* NS_DECL_ISUPPORTS_INHERITED
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* ...other nsIBar and Bar methods...
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* };
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*/
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#define NS_DECL_ISUPPORTS_INHERITED \
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public: \
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NS_IMETHOD QueryInterface(REFNSIID aIID, \
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void** aInstancePtr); \
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NS_IMETHOD_(nsrefcnt) AddRef(void); \
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NS_IMETHOD_(nsrefcnt) Release(void); \
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/**
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* These macros can be used in conjunction with NS_DECL_ISUPPORTS_INHERITED
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* to implement the nsISupports methods, forwarding the invocations to a
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* superclass that already implements nsISupports.
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*
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* Note that I didn't make these inlined because they're virtual methods.
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*/
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#define NS_IMPL_ADDREF_INHERITED(Class, Super) \
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NS_IMETHODIMP_(nsrefcnt) Class::AddRef(void) \
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{ \
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return Super::AddRef(); \
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} \
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#define NS_IMPL_RELEASE_INHERITED(Class, Super) \
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NS_IMETHODIMP_(nsrefcnt) Class::Release(void) \
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{ \
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return Super::Release(); \
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} \
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#define NS_IMPL_QUERY_INTERFACE_INHERITED(Class, Super, AdditionalInterface) \
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NS_IMETHODIMP Class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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if (!aInstancePtr) return NS_ERROR_NULL_POINTER; \
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if (aIID.Equals(AdditionalInterface::GetIID())) { \
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*aInstancePtr = NS_STATIC_CAST(AdditionalInterface*, this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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return Super::QueryInterface(aIID, aInstancePtr); \
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} \
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#define NS_IMPL_ISUPPORTS_INHERITED(Class, Super, AdditionalInterface) \
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NS_IMPL_QUERY_INTERFACE_INHERITED(Class, Super, AdditionalInterface) \
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NS_IMPL_ADDREF_INHERITED(Class, Super) \
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NS_IMPL_RELEASE_INHERITED(Class, Super) \
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////////////////////////////////////////////////////////////////////////////////
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/**
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*
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* Threadsafe implementations of the ISupports convenience macros
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*
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*/
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/**
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* IID for the nsIsThreadsafe interface
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* {88210890-47a6-11d2-bec3-00805f8a66dc}
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*
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* This interface is *only* used for debugging purposes to determine if
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* a given component is threadsafe.
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*/
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#define NS_ISTHREADSAFE_IID \
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{ 0x88210890, 0x47a6, 0x11d2, \
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{0xbe, 0xc3, 0x00, 0x80, 0x5f, 0x8a, 0x66, 0xdc} }
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#if defined(NS_MT_SUPPORTED)
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#define NS_LOCK_INSTANCE() \
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PR_CEnterMonitor((void*)this)
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#define NS_UNLOCK_INSTANCE() \
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PR_CExitMonitor((void*)this)
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/**
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* Use this macro to implement the AddRef method for a given <i>_class</i>
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* @param _class The name of the class implementing the method
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*/
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#define NS_IMPL_THREADSAFE_ADDREF(_class) \
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NS_IMETHODIMP_(nsrefcnt) _class::AddRef(void) \
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{ \
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NS_PRECONDITION(PRInt32(mRefCnt) >= 0, "illegal refcnt"); \
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return PR_AtomicIncrement((PRInt32*)&mRefCnt); \
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}
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/**
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* Use this macro to implement the Release method for a given <i>_class</i>
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* @param _class The name of the class implementing the method
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*/
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#define NS_IMPL_THREADSAFE_RELEASE(_class) \
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nsrefcnt _class::Release(void) \
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{ \
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nsrefcnt count; \
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NS_PRECONDITION(0 != mRefCnt, "dup release"); \
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count = PR_AtomicDecrement((PRInt32 *)&mRefCnt); \
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if (0 == count) { \
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NS_DELETEXPCOM(this); \
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return 0; \
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} \
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return count; \
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}
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////////////////////////////////////////////////////////////////////////////////
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|
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/*
|
|
* Some convenience macros for implementing QueryInterface
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|
*/
|
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|
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/**
|
|
* This implements query interface with two assumptions: First, the
|
|
* class in question implements nsISupports and its own interface and
|
|
* nothing else. Second, the implementation of the class's primary
|
|
* inheritance chain leads to its own interface.
|
|
*
|
|
* @param _class The name of the class implementing the method
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|
* @param _classiiddef The name of the #define symbol that defines the IID
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|
* for the class (e.g. NS_ISUPPORTS_IID)
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|
*/
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#if defined(NS_DEBUG)
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|
#define NS_VERIFY_THREADSAFE_INTERFACE(_iface) \
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if (NULL != (_iface)) { \
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nsISupports* tmp; \
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static NS_DEFINE_IID(kIsThreadsafeIID, NS_ISTHREADSAFE_IID); \
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NS_PRECONDITION((NS_OK == _iface->QueryInterface(kIsThreadsafeIID, \
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(void**)&tmp)), \
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"Interface is not threadsafe"); \
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}
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#define NS_IMPL_THREADSAFE_QUERY_INTERFACE(_class,_classiiddef) \
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NS_IMETHODIMP _class::QueryInterface(REFNSIID aIID, void** aInstancePtr) \
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{ \
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|
if (NULL == aInstancePtr) { \
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return NS_ERROR_NULL_POINTER; \
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} \
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\
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*aInstancePtr = NULL; \
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\
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static NS_DEFINE_IID(kISupportsIID, NS_ISUPPORTS_IID); \
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static NS_DEFINE_IID(kIsThreadsafeIID, NS_ISTHREADSAFE_IID); \
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|
static NS_DEFINE_IID(kClassIID, _classiiddef); \
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|
if (aIID.Equals(kClassIID)) { \
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|
*aInstancePtr = (void*) this; \
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|
NS_ADDREF_THIS(); \
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return NS_OK; \
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|
} \
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if (aIID.Equals(kISupportsIID)) { \
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*aInstancePtr = (void*) ((nsISupports*)this); \
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NS_ADDREF_THIS(); \
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return NS_OK; \
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} \
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if (aIID.Equals(kIsThreadsafeIID)) { \
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return NS_OK; \
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} \
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return NS_NOINTERFACE; \
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}
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#else /* !NS_DEBUG */
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#define NS_VERIFY_THREADSAFE_INTERFACE(_iface)
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#define NS_IMPL_THREADSAFE_QUERY_INTERFACE(_class,_classiiddef) \
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NS_IMPL_QUERY_INTERFACE(_class, _classiiddef)
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|
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#endif /* !NS_DEBUG */
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|
|
/**
|
|
* Convenience macro for implementing all nsISupports methods for
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|
* a simple class.
|
|
* @param _class The name of the class implementing the method
|
|
* @param _classiiddef The name of the #define symbol that defines the IID
|
|
* for the class (e.g. NS_ISUPPORTS_IID)
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|
*/
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|
|
#define NS_IMPL_THREADSAFE_ISUPPORTS(_class,_classiiddef) \
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|
NS_IMPL_THREADSAFE_ADDREF(_class) \
|
|
NS_IMPL_THREADSAFE_RELEASE(_class) \
|
|
NS_IMPL_THREADSAFE_QUERY_INTERFACE(_class,_classiiddef)
|
|
|
|
#else /* !NS_MT_SUPPORTED */
|
|
|
|
#define NS_LOCK_INSTANCE()
|
|
|
|
#define NS_UNLOCK_INSTANCE()
|
|
|
|
#define NS_IMPL_THREADSAFE_ADDREF(_class) NS_IMPL_ADDREF(_class)
|
|
|
|
#define NS_IMPL_THREADSAFE_RELEASE(_class) NS_IMPL_RELEASE(_class)
|
|
|
|
#define NS_VERIFY_THREADSAFE_INTERFACE(_iface)
|
|
|
|
#define NS_IMPL_THREADSAFE_QUERY_INTERFACE(_class,_classiiddef) \
|
|
NS_IMPL_QUERY_INTERFACE(_class, _classiiddef)
|
|
|
|
#define NS_IMPL_THREADSAFE_ISUPPORTS(_class,_classiiddef) \
|
|
NS_IMPL_ADDREF(_class) \
|
|
NS_IMPL_RELEASE(_class) \
|
|
NS_IMPL_QUERY_INTERFACE(_class,_classiiddef)
|
|
|
|
#endif /* !NS_MT_SUPPORTED */
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
// Debugging Macros
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
/**
|
|
* Macro for instantiating a new object that implements nsISupports.
|
|
* Use this in your factory methods to allow for refcnt tracing.
|
|
* Note that you can only use this if you adhere to the no arguments
|
|
* constructor com policy (which you really should!).
|
|
* @param _result Where the new instance pointer is stored
|
|
* @param _type The type of object to call "new" with.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_NEWXPCOM(_result,_type) \
|
|
PR_BEGIN_MACRO \
|
|
_result = new _type(); \
|
|
nsTraceRefcnt::Create(_result, #_type, __FILE__, __LINE__); \
|
|
PR_END_MACRO
|
|
#else
|
|
#define NS_NEWXPCOM(_result,_type) \
|
|
_result = new _type()
|
|
#endif
|
|
|
|
/**
|
|
* Macro for deleting an object that implements nsISupports.
|
|
* Use this in your Release methods to allow for refcnt tracing.
|
|
* @param _ptr The object to delete.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_DELETEXPCOM(_ptr) \
|
|
PR_BEGIN_MACRO \
|
|
nsTraceRefcnt::Destroy((_ptr), __FILE__, __LINE__); \
|
|
delete (_ptr); \
|
|
PR_END_MACRO
|
|
#else
|
|
#define NS_DELETEXPCOM(_ptr) \
|
|
delete (_ptr)
|
|
#endif
|
|
|
|
/**
|
|
* Macro for adding a reference to an interface.
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_ADDREF(_ptr) \
|
|
((nsrefcnt) nsTraceRefcnt::AddRef((_ptr), (_ptr)->AddRef(), \
|
|
__FILE__, __LINE__))
|
|
#else
|
|
#define NS_ADDREF(_ptr) \
|
|
(_ptr)->AddRef()
|
|
#endif
|
|
|
|
/**
|
|
* Macro for adding a reference to this. This macro should be used
|
|
* because NS_ADDREF (when tracing) may require an ambiguous cast
|
|
* from the pointers primary type to nsISupports. This macro sidesteps
|
|
* that entire problem.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_ADDREF_THIS() \
|
|
((nsrefcnt) nsTraceRefcnt::AddRef(this, AddRef(), __FILE__, __LINE__))
|
|
#else
|
|
#define NS_ADDREF_THIS() \
|
|
AddRef()
|
|
#endif
|
|
|
|
/**
|
|
* Macro for adding a reference to an interface that checks for NULL.
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_IF_ADDREF(_ptr) \
|
|
((0 != (_ptr)) \
|
|
? ((nsrefcnt) nsTraceRefcnt::AddRef((_ptr), (_ptr)->AddRef(), __FILE__, \
|
|
__LINE__)) \
|
|
: 0)
|
|
#else
|
|
#define NS_IF_ADDREF(_ptr) \
|
|
((0 != (_ptr)) ? (_ptr)->AddRef() : 0)
|
|
#endif
|
|
|
|
/**
|
|
* Macro for releasing a reference to an interface.
|
|
*
|
|
* Note that when MOZ_TRACE_XPCOM_REFCNT is defined that the release will
|
|
* be done before the trace message is logged. If the reference count
|
|
* goes to zero and implementation of Release logs a message, the two
|
|
* messages will be logged out of order.
|
|
*
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_RELEASE(_ptr) \
|
|
PR_BEGIN_MACRO \
|
|
nsTraceRefcnt::Release((_ptr), (_ptr)->Release(), __FILE__, __LINE__); \
|
|
(_ptr) = 0; \
|
|
PR_END_MACRO
|
|
#else
|
|
#define NS_RELEASE(_ptr) \
|
|
PR_BEGIN_MACRO \
|
|
(_ptr)->Release(); \
|
|
(_ptr) = 0; \
|
|
PR_END_MACRO
|
|
#endif
|
|
|
|
/**
|
|
* Macro for releasing a reference to an interface.
|
|
*
|
|
* Note that when MOZ_TRACE_XPCOM_REFCNT is defined that the release will
|
|
* be done before the trace message is logged. If the reference count
|
|
* goes to zero and implementation of Release logs a message, the two
|
|
* messages will be logged out of order.
|
|
*
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_RELEASE_THIS() \
|
|
nsTraceRefcnt::Release(this, Release(), __FILE__, __LINE__)
|
|
#else
|
|
#define NS_RELEASE_THIS() \
|
|
Release()
|
|
#endif
|
|
|
|
/**
|
|
* Macro for releasing a reference to an interface, except that this
|
|
* macro preserves the return value from the underlying Release call.
|
|
* The interface pointer argument will only be NULLed if the reference count
|
|
* goes to zero.
|
|
*
|
|
* Note that when MOZ_TRACE_XPCOM_REFCNT is defined that the release will
|
|
* be done before the trace message is logged. If the reference count
|
|
* goes to zero and implementation of Release logs a message, the two
|
|
* messages will be logged out of order.
|
|
*
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_RELEASE2(_ptr, _result) \
|
|
PR_BEGIN_MACRO \
|
|
_result = ((nsrefcnt) nsTraceRefcnt::Release((_ptr), (_ptr)->Release(), \
|
|
__FILE__, __LINE__)); \
|
|
if (0 == (_result)) (_ptr) = 0; \
|
|
PR_END_MACRO
|
|
#else
|
|
#define NS_RELEASE2(_ptr, _result) \
|
|
PR_BEGIN_MACRO \
|
|
_result = (_ptr)->Release(); \
|
|
if (0 == (_result)) (_ptr) = 0; \
|
|
PR_END_MACRO
|
|
#endif
|
|
|
|
/**
|
|
* Macro for releasing a reference to an interface that checks for NULL;
|
|
*
|
|
* Note that when MOZ_TRACE_XPCOM_REFCNT is defined that the release will
|
|
* be done before the trace message is logged. If the reference count
|
|
* goes to zero and implementation of Release logs a message, the two
|
|
* messages will be logged out of order.
|
|
*
|
|
* @param _ptr The interface pointer.
|
|
*/
|
|
#ifdef MOZ_TRACE_XPCOM_REFCNT
|
|
#define NS_IF_RELEASE(_ptr) \
|
|
PR_BEGIN_MACRO \
|
|
if (_ptr) { \
|
|
(nsrefcnt) nsTraceRefcnt::Release((_ptr), (_ptr)->Release(), \
|
|
__FILE__, __LINE__); \
|
|
(_ptr) = 0; \
|
|
} \
|
|
PR_END_MACRO
|
|
#else
|
|
#define NS_IF_RELEASE(_ptr) \
|
|
PR_BEGIN_MACRO \
|
|
if (_ptr) { \
|
|
(_ptr)->Release(); \
|
|
(_ptr) = 0; \
|
|
} \
|
|
PR_END_MACRO
|
|
#endif
|
|
|
|
#ifdef MOZ_LOG_REFCNT
|
|
#define NS_LOG_ADDREF(_ptr, _refcnt, _file, _line) \
|
|
nsTraceRefcnt::LogAddRef((_ptr), (_refcnt), (_file), (_line))
|
|
|
|
#define NS_LOG_RELEASE(_ptr, _refcnt, _file, _line) \
|
|
nsTraceRefcnt::LogRelease((_ptr), (_refcnt), (_file), (_line))
|
|
|
|
#else
|
|
#define NS_LOG_ADDREF(_file, _line, _ptr, _refcnt)
|
|
#define NS_LOG_RELEASE(_file, _line, _ptr, _refcnt)
|
|
#endif
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// A type-safe interface for calling |QueryInterface()|. A similar implementation
|
|
// exists in "nsCOMPtr.h" for use with |nsCOMPtr|s.
|
|
|
|
extern "C++" {
|
|
// ...because some one is accidentally including this file inside an |extern "C"|
|
|
|
|
class nsISupports;
|
|
|
|
template <class T>
|
|
struct nsCOMTypeInfo
|
|
{
|
|
static const nsIID& GetIID() { return T::GetIID(); }
|
|
};
|
|
|
|
#ifdef NSCAP_FEATURE_HIDE_NSISUPPORTS_GETIID
|
|
template <>
|
|
struct nsCOMTypeInfo<nsISupports>
|
|
{
|
|
static const nsIID& GetIID() { static nsIID iid = NS_ISUPPORTS_IID; return iid; }
|
|
};
|
|
#endif
|
|
|
|
#define NS_GET_IID(T) nsCOMTypeInfo<T>::GetIID()
|
|
|
|
template <class DestinationType>
|
|
inline
|
|
nsresult
|
|
CallQueryInterface( nsISupports* aSource, DestinationType** aDestination )
|
|
// a type-safe shortcut for calling the |QueryInterface()| member function
|
|
{
|
|
NS_PRECONDITION(aSource, "null parameter");
|
|
NS_PRECONDITION(aDestination, "null parameter");
|
|
|
|
return aSource->QueryInterface(nsCOMTypeInfo<DestinationType>::GetIID(), (void**)aDestination);
|
|
}
|
|
|
|
} // extern "C++"
|
|
|
|
////////////////////////////////////////////////////////////////////////////////
|
|
|
|
#endif /* __nsISupportsUtils_h */
|