C++函数用时及调用跟踪类

这是很久以用看到的一种做法，利用了C++类的析构函数自动调用这一特性来实现的，十分巧妙。我实现的这个十分简陋，可能还有bug，但好歹思想是那么回事了，放着自己惦记时看看，呵呵。

 

 

函数跟踪类，跟踪函数的调用情况及运行时间

注意：非线程安全类，使用了MFC的CString及CFile

仅适用于函数嵌套层次小于255的情况。

 

 

可自已修改成与MFC无关的。

 

使用方法：

在需要的地方加入：

#ifndef SCOUTFUN#define SCOUTFUN#endif#include "FunScout.h" 

在开始记录时，一般是APP开始的地方，MFC的InitInstance方法中加入：

FUNSCOUT_INIT( "C://FunScout.txt" );

在结束记录时，也就是ExitInstance方法中加入：

FUNSCOUT_RELEASE;

在需要跟踪的函数的第一个语句前插入:

FUNSCOUT_ADDFUN( "FunName" );  

 

Funcout.h

/*zen_yue函数跟踪类，跟踪函数的调用情况及运行时间注意：非线程安全类，使用了MFC的CString及CFile仅适用于函数嵌套层次小于255的情况。使用方法：在App的h文件中加入下面两句：#ifndef SCOUTFUN#define SCOUTFUN#endif#include "FunScout.h"在App的InitInstance方法中加入:FUNSCOUT_INIT( "C://FunScout.txt" );在App的ExitInstance方法或其它可能造成程序终止的地方加入:FUNSCOUT_RELEASE;在需要跟踪的函数的第一个语句前插入:FUNSCOUT_ADDFUN( "FunName" );这样，函数的调用过程及各函数运行所占用的时间，都将被记录在文件C:/FunScout.txt文件中*/#ifndef FUNSCOUT_H#define FUNSCOUT_H#ifdef SCOUTFUN#ifndefFUNSCOUT_INIT( path )#define FUNSCOUT_INIT( path ) CFunScout::Init( path )#endif#ifndefFUNSCOUT_RELEASE#define FUNSCOUT_RELEASE CFunScout::Release()#endif#ifndefFUNSCOUT_ADDFUN( fun )#define FUNSCOUT_ADDFUN( fun ) CFunScout scoutfun( fun )#endif#ifndefFUNSCOUT_INFUN( fc, fun )#define FUNSCOUT_INFUN( fc, fun ) fc.in( fun )#endif#ifndefFUNSCOUT_OUTFUN( fc )#define FUNSCOUT_OUTFUN( fc ) fun.out()#endif#else#ifndefFUNSCOUT_INIT#define FUNSCOUT_INIT( path )#endif#ifndefFUNSCOUT_RELEASE#define FUNSCOUT_RELEASE#endif#ifndefFUNSCOUT_ADDFUN#define FUNSCOUT_ADDFUN( fun )#endif#ifndefFUNSCOUT_INFUN#define FUNSCOUT_INFUN( fc, fun )#endif#ifndefFUNSCOUT_OUTFUN#define FUNSCOUT_OUTFUN( fc )#endif#endifclass CFunScout{public:CFunScout( const CString& funName );~CFunScout();void in( const CString& funName );void out();static void Init( const CString& path );static void Release();public:float GetNowTime();static CFile* file;static int level;static CString m_tabStr;static CString m_log;static BOOL m_isCanGetCPUFreq;static __int64 m_CPUFreq;static __int64 m_startCPUCount;float m_startTime;CString m_funName;};#endif //FUNSCOUT_H

 

FunScout.cpp

#include "stdafx.h"#include "FunScout.h"CFile* CFunScout::file = NULL;int CFunScout::level = 0;CString CFunScout::m_tabStr = "";CString CFunScout::m_log = "";BOOL CFunScout::m_isCanGetCPUFreq = TRUE;__int64 CFunScout::m_CPUFreq = 0;__int64 CFunScout::m_startCPUCount = 0;CFunScout::CFunScout( const CString& funName ){in( funName );}CFunScout::~CFunScout(){out();}void CFunScout::Init( const CString& path ){m_isCanGetCPUFreq = QueryPerformanceFrequency( (LARGE_INTEGER*)&m_CPUFreq );if ( m_isCanGetCPUFreq != FALSE ){QueryPerformanceCounter( (LARGE_INTEGER*)&m_startCPUCount );}for ( int i = 0; i < 255; i++){m_tabStr += "/t";}level = 0;if( file == NULL){file = new CFile;if( file != NULL ){if( !file->Open( path, CFile::modeCreate | CFile::modeWrite ) ){delete file;file = NULL;}}}}void CFunScout::Release(){if( file != NULL ){file->Close();delete file;file = NULL;}}float CFunScout::GetNowTime(){if ( m_isCanGetCPUFreq != FALSE ){__int64 stopCount;QueryPerformanceCounter( (LARGE_INTEGER*)&stopCount );return (float)((double)( stopCount - m_startCPUCount ) * 1000.0 / (double)m_CPUFreq);}else{return (float)GetTickCount();}}void CFunScout::in( const CString& funName ){if( file != NULL ){m_funName = funName;CString str = "";str.Format( "%s%s/r/n", m_tabStr.Left( level ), m_funName );m_log += str;level++;m_startTime = GetNowTime();}}void CFunScout::out(){if( file != NULL ){level--;CString str = "";str.Format( "%s%s used time: %f ms/r/n", m_tabStr.Left( level ), m_funName, GetNowTime() - m_startTime );m_log += str;file->Write( m_log, m_log.GetLength() );m_log.ReleaseBuffer();m_log = "";}}