source: vbox/trunk/src/libs/xpcom18a4/xpcom/glue/nsTraceRefcnt.h@ 95259

/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* ***** BEGIN LICENSE BLOCK *****
 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
 *
 * The contents of this file are subject to the Mozilla Public License Version
 * 1.1 (the "License"); you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 * http://www.mozilla.org/MPL/
 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is Mozilla Communicator client code.
 *
 * The Initial Developer of the Original Code is
 * Netscape Communications Corporation.
 * Portions created by the Initial Developer are Copyright (C) 1998
 * the Initial Developer. All Rights Reserved.
 *
 * Contributor(s):
 *   L. David Baron <dbaron@dbaron.org>
 *
 * Alternatively, the contents of this file may be used under the terms of
 * either of the GNU General Public License Version 2 or later (the "GPL"),
 * or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
 * in which case the provisions of the GPL or the LGPL are applicable instead
 * of those above. If you wish to allow use of your version of this file only
 * under the terms of either the GPL or the LGPL, and not to allow others to
 * use your version of this file under the terms of the MPL, indicate your
 * decision by deleting the provisions above and replace them with the notice
 * and other provisions required by the GPL or the LGPL. If you do not delete
 * the provisions above, a recipient may use your version of this file under
 * the terms of any one of the MPL, the GPL or the LGPL.
 *
 * ***** END LICENSE BLOCK ***** */
#ifndef nsTraceRefcnt_h___
#define nsTraceRefcnt_h___

#include "nscore.h"

class nsISupports;

// By default refcnt logging is not part of the build.
#undef NS_BUILD_REFCNT_LOGGING

#if (defined(DEBUG) || defined(FORCE_BUILD_REFCNT_LOGGING))
// Make refcnt logging part of the build. This doesn't mean that
// actual logging will occur (that requires a separate enable; see
// nsTraceRefcnt.h for more information).
#define NS_BUILD_REFCNT_LOGGING 1
#endif

// If NO_BUILD_REFCNT_LOGGING is defined then disable refcnt logging
// in the build. This overrides FORCE_BUILD_REFCNT_LOGGING.
#if defined(NO_BUILD_REFCNT_LOGGING)
#undef NS_BUILD_REFCNT_LOGGING
#endif

#ifdef NS_BUILD_REFCNT_LOGGING

#define NS_LOG_ADDREF(_p, _rc, _type, _size) \
  nsTraceRefcnt::LogAddRef((_p), (_rc), (_type), (PRUint32) (_size))

#define NS_LOG_RELEASE(_p, _rc, _type) \
  nsTraceRefcnt::LogRelease((_p), (_rc), (_type))

#define MOZ_DECL_CTOR_COUNTER(_type)

#define MOZ_COUNT_CTOR(_type)                                 \
PR_BEGIN_MACRO                                                \
  nsTraceRefcnt::LogCtor((void*)this, #_type, sizeof(*this)); \
PR_END_MACRO

#define MOZ_COUNT_DTOR(_type)                                 \
PR_BEGIN_MACRO                                                \
  nsTraceRefcnt::LogDtor((void*)this, #_type, sizeof(*this)); \
PR_END_MACRO

#ifdef HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR  // from autoconf (XXX needs to be
                                          // set for non-autoconf platforms)

// nsCOMPtr.h allows these macros to be defined by clients
// These logging functions require dynamic_cast<void *>, so we don't
// define these macros if we don't have dynamic_cast.
#define NSCAP_LOG_ASSIGNMENT(_c, _p)                                \
  if (_p)                                                           \
    nsTraceRefcnt::LogAddCOMPtr((_c),NS_STATIC_CAST(nsISupports*,_p))

#define NSCAP_LOG_RELEASE(_c, _p)                                   \
  if (_p)                                                           \
    nsTraceRefcnt::LogReleaseCOMPtr((_c), NS_STATIC_CAST(nsISupports*,_p))

#endif /* HAVE_CPP_DYNAMIC_CAST_TO_VOID_PTR */

#else /* !NS_BUILD_REFCNT_LOGGING */

#define NS_LOG_ADDREF(_p, _rc, _type, _size)
#define NS_LOG_RELEASE(_p, _rc, _type)
#define MOZ_DECL_CTOR_COUNTER(_type)
#define MOZ_COUNT_CTOR(_type)
#define MOZ_COUNT_DTOR(_type)

#endif /* NS_BUILD_REFCNT_LOGGING */

//----------------------------------------------------------------------

/**
 * Note: The implementations for these methods are no-ops in a build
 * where NS_BUILD_REFCNT_LOGGING is disabled.
 */
class nsTraceRefcnt {
public:
  static NS_COM void LogAddRef(void* aPtr,
                               nsrefcnt aNewRefCnt,
                               const char* aTypeName,
                               PRUint32 aInstanceSize);

  static NS_COM void LogRelease(void* aPtr,
                                nsrefcnt aNewRefCnt,
                                const char* aTypeName);

  static NS_COM void LogCtor(void* aPtr, const char* aTypeName,
                             PRUint32 aInstanceSize);

  static NS_COM void LogDtor(void* aPtr, const char* aTypeName,
                             PRUint32 aInstanceSize);

  static NS_COM void LogAddCOMPtr(void *aCOMPtr, nsISupports *aObject);

  static NS_COM void LogReleaseCOMPtr(void *aCOMPtr, nsISupports *aObject);

};
#endif /* nsTraceRefcnt_h___ */