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/* -*- 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 nsTraceRefcnt_h___
#define nsTraceRefcnt_h___
#include <stdio.h> // for FILE
#include "nscore.h"
class nsTraceRefcnt
{
public:
static void Shutdown();
enum StatisticsType {
ALL_STATS,
NEW_STATS
};
static nsresult DumpStatistics(StatisticsType aType = ALL_STATS,
FILE* aOut = 0);
static void ResetStatistics();
static void DemangleSymbol(const char* aSymbol, char* aBuffer, int aBufLen);
static void WalkTheStack(FILE* aStream);
/**
* This is a variant of |WalkTheStack| that uses |CodeAddressService| to cache
* the results of |NS_DescribeCodeAddress|. If |WalkTheStackCached| is being
* called frequently, it will be a few orders of magnitude faster than
* |WalkTheStack|. However, the cache uses a lot of memory, which can cause
* OOM crashes. Therefore, this should only be used for things like refcount
* logging which walk the stack extremely frequently.
*/
static void WalkTheStackCached(FILE* aStream);
/**
* Tell nsTraceRefcnt whether refcounting, allocation, and destruction
* activity is legal. This is used to trigger assertions for any such
* activity that occurs because of static constructors or destructors.
*/
static void SetActivityIsLegal(bool aLegal);
};
#define NS_TRACE_REFCNT_CONTRACTID "@mozilla.org/xpcom/trace-refcnt;1"
#define NS_TRACE_REFCNT_CID \
{ /* e3e7511e-a395-4924-94b1-d527861cded4 */ \
0xe3e7511e, \
0xa395, \
0x4924, \
{0x94, 0xb1, 0xd5, 0x27, 0x86, 0x1c, 0xde, 0xd4} \
} \
////////////////////////////////////////////////////////////////////////////////
// And now for that utility that you've all been asking for...
extern "C" void
NS_MeanAndStdDev(double aNumberOfValues,
double aSumOfValues, double aSumOfSquaredValues,
double* aMeanResult, double* aStdDevResult);
////////////////////////////////////////////////////////////////////////////////
#endif
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