(如果没看过"C++的profile辅助模板类" 先去看看那里的说明部分
http://www.csdn.net/Develop/read_article.asp?id=26029 )
先看例子：
PROCEDURE_TIMEX(1, "Sleep(200)", Sleep(200));
for (char i = 0; i != 5; ++i)
{
TOTAL_COUNTX(2, "for");
TOTAL_TIMEX(3, "for");
rt = FUNC_TIMEX(4, "MySleep(200)", MySleep(200));
}
运行完后结果：
4 "MySleep(200)": 5 times, 1.00 seconds.
3 "for": 5 times, 1.00 seconds.
2 "for": 5 times.
1 "Sleep(200)": 1 times, 0.20 seconds.
还是很方便吧？
标志(就是这些宏的第一个参数)
还是只能为非负整数
用相同的数做标志 计时/计数结果叠加(TOTAL_COUNT只与TOTAL_COUNT叠加)
出结果时 这些宏的第二个参数会显示在标志的后面
其实偷懒一点 第二个参数可以不用引号引起来 如
PROCEDURE_TIMEX(1, Sleep(200), Sleep(200));
但那样代码会看起来比较乱
另外 看了 PROCEDURE_TIME 或 PROCEDURE_TIMEX 的代码你就会发现
其实可以这样用：
PROCEDURE_TIMEX(1, Several statements,
{
TOTAL_COUNTX(2, "for");
TOTAL_TIMEX(3, "for");
rt = FUNC_TIMEX(4, "MySleep(200)", MySleep(200));
}
);
注意：
1. 如果你前后两次用了同一个标志 但显示的字符串设的不同
最后显示结果时 以最后一次设的字符串为准
在实现时我用静态变量初始化的方法 这样基本上去掉了额外开销
(要注意静态变量只初始化一次 所以 到底哪里才是最后一次设的要想想清楚)
如：
for (int i = 0; ; ++i)
{
PROCEDURE_TIMEX(1, "Sleep(200)", Sleep(200));
if (i == 1) break;
FUNC_TIMEX(1, "MySleep(200)", MySleep(200));
}
运行完后结果是：
1 "MySleep(200)": 3 times, 0.60 seconds.
2. 如果一个标志在很多地方用 你想要把那些初始化的开销也去掉
就用后面不带X的那个版本
然后在别的地方用类似
SET_COUNT_NAME(1, "for count only")
或
SET_TIMER_NAME(1, "for else")
再次祝大家用得愉快！
以下代码用 VC6 GCC 编译运行通过
//filename: ShowRunTime.h
#ifndef SHOWTIME_H
#define SHOWTIME_H
#include <stdio.h>
#include <windows.h>
#include <time.h>
template <int I>
class CShowRunTimesAss
{
public:
unsigned int total_times;
CShowRunTimesAss()
{
total_times = 0;
}
~CShowRunTimesAss()
{
if (total_times == -1)
return;
char tmp[256];
sprintf(tmp, "\n%d %s: %u times.\n", I, GetName(), total_times);
printf(tmp);
OutputDebugString(tmp);
}
static void AddShowRunTimes()
{
static CShowRunTimesAss<I> tt;
++tt.total_times;
}
static char* GetName()
{
static char str[128];
return str;
}
CShowRunTimesAss(const char* const str)
{
total_times = -1;
strncpy(GetName(), str, 127);
}
};
template <int I>
class CShowRunTimeAss
{
public:
unsigned int total_time;
unsigned int total_times;
CShowRunTimeAss()
{
total_time = total_times = 0;
}
~CShowRunTimeAss()
{
if (total_times == -1)
return;
char tmp[256];
sprintf(tmp, "\n%d %s: %u times, %4.2f seconds.\n",
I, GetName(), total_times, (double)total_time / CLOCKS_PER_SEC);
printf(tmp);
OutputDebugString(tmp);
}
static char* GetName()
{
static char str[128];
return str;
}
CShowRunTimeAss(const char* const str)
{
total_time = total_times = -1;
strncpy(GetName(), str, 127);
}
};
template <int I>
class CShowRunTime
{
public:
CShowRunTime()
{
ShowRunTimeBegin();
}
~CShowRunTime()
{
ShowRunTimeEnd();
}
static CShowRunTimeAss<I>& Gettt()
{
static CShowRunTimeAss<I> tt;
return tt;
}
static bool ShowRunTimeBegin()
{
//Gettt().total_time -= clock(); // more slowly
Gettt().total_time -= GetTickCount();
return true;
}
template <typename T>
static T ShowRunTimeEnd(T t)
{
//Gettt().total_time += clock();
Gettt().total_time += GetTickCount();
++Gettt().total_times;
return t;
}
static bool ShowRunTimeBegin(const char* const str)
{
static CShowRunTimeAss<I> t(str);
//Gettt().total_time -= clock();
Gettt().total_time -= GetTickCount();
return true;
}
static void ShowRunTimeEnd()
{
//Gettt().total_time += clock();
Gettt().total_time += GetTickCount();
++Gettt().total_times;
}
};
//////////////////////////////////////////////////////////////////////////
#define TOTAL_TIME_BEGIN(I) \
CShowRunTime<I>::ShowRunTimeBegin()
#define TOTAL_TIME_END(I, X) \
CShowRunTime<I>::ShowRunTimeEnd(X)
#define TOTAL_COUNT(I) \
do { CShowRunTimesAss<I>::AddShowRunTimes(); } while (0)
#define TOTAL_TIME(I) \
CShowRunTime<I> _ShowRunTime_##I
#define PROCEDURE_TIME(I, X) \
do { CShowRunTime<I> _ShowRunTime_; X; } while (0)
#define FUNC_TIME(I, X) \
(TOTAL_TIME_BEGIN(I) ? TOTAL_TIME_END(I, X) : TOTAL_TIME_END(I, X))
#define REF_FUNC_TIME(I, X) \
(TOTAL_TIME_BEGIN(I) ? *TOTAL_TIME_END(I, &(X)) : *TOTAL_TIME_END(I, &(X)))
#define SET_COUNT_NAME(I, S) \
static CShowRunTimesAss<I> _Set_ShowRunTimes_Name_##I(#S)
#define SET_TIMER_NAME(I, S) \
static CShowRunTimeAss<I> _Set_ShowRunTime_Name_##I(#S)
#define TOTAL_TIME_BEGINX(I, S) \
CShowRunTime<I>::ShowRunTimeBegin(#S)
#define TOTAL_COUNTX(I, S) \
do { SET_COUNT_NAME(I, S); CShowRunTimesAss<I>::AddShowRunTimes(); } while (0)
#define TOTAL_TIMEX(I, S) \
SET_TIMER_NAME(I, S); CShowRunTime<I> _ShowRunTime_##I
#define PROCEDURE_TIMEX(I, S, X) \
do { SET_TIMER_NAME(I, S); CShowRunTime<I> _ShowRunTime_; X; } while (0)
#define FUNC_TIMEX(I, S, X) \
(TOTAL_TIME_BEGINX(I, S) ? TOTAL_TIME_END(I, X) : TOTAL_TIME_END(I, X))
#define REF_FUNC_TIMEX(I, S, X) \
(TOTAL_TIME_BEGINX(I, S) ? *TOTAL_TIME_END(I, &(X)) : *TOTAL_TIME_END(I, &(X)))
#endif // #ifndef SHOWTIME_H
//filename: main.cpp
#include <iostream>
#include "ShowRunTime.h"
using namespace std;
class ctest1
{
public:
ctest1(const ctest1& rhs) { cout << "ctest1() copy\n"; }
ctest1() { cout << "ctest1()\n"; }
~ctest1() { cout << "~ctest1()\n"; }
};
ctest1 ftest1()
{
cout << "ftest1()\n";
return ctest1();
}
int testval()
{
cout << "testval()" << endl;
return 0;
}
int& testref()
{
static int i;
cout << "testref() " << i << endl;
return i;
}
const int& testconstref()
{
static int i;
cout << "testconstref() " << i << endl;
return i;
}
int MySleep(DWORD dwMilliseconds)
{
Sleep(dwMilliseconds);
return 0;
}
int main()
{
{TOTAL_TIMEX(0, "main");
ctest1 t;
int rt, i;
cout << "call ftest1 direct\n";
ftest1();
cout << "/call ftest1 direct\n";
cout << "call ftest1 indirect\n";
FUNC_TIMEX(1, "ftest1", ftest1());
cout << "/call ftest1 indirect\n";
cout << endl;
testref() = 1;
// testconstref() = 2;
// testval() = 3;
REF_FUNC_TIMEX(10, "testref", testref()) = 4;
// REF_FUNC_TIME(10, testconstref()) = 5; // VC6 Error!
// Should not be OK. assignment of read-only location!
// REF_FUNC_TIME(10, testval()) = 6;
cout << "call testref direct\n";
cout << "result address is: " << (int)&testref() << endl;
cout << "/call testref direct\n";
cout << "call testref indirect\n";
cout << "result address is: " <<
(int)&REF_FUNC_TIMEX(11, "testref", testref()) << endl;
cout << "/call address indirect\n";
cout << endl;
PROCEDURE_TIMEX(11, "Sleep", Sleep(200));
for (i = 0; i != 5; ++i)
{
TOTAL_COUNTX(2, "for");
TOTAL_TIMEX(3, "for");
rt = FUNC_TIMEX(4, "MySleep", MySleep(200));
}
PROCEDURE_TIMEX(12, for several statements,
{
cout << "call ftest1 indirect once again\n";
FUNC_TIMEX(1, "ftest1", ftest1());
cout << "/call ftest1 indirect once again\n";
cout << "call ftest1 indirect once again, and use another counter\n";
FUNC_TIMEX(5, "ftest1", ftest1());
cout << "/call ftest1 indirect once again, and use another counter\n";
}
);
for (i = 0; ; ++i)
{
PROCEDURE_TIMEX(13, "Sleep(200)", Sleep(200));
if (i == 1)
break;
FUNC_TIMEX(13, "MySleep(200)", MySleep(200));
}
} //TOTAL_TIMEX(0, main);
// SET_TIMER_NAME(13, "Sleep(200) MySleep(200) Sleep(200)");
// system("PAUSE");
return 0;
}
