1?#ifndef?_GHH_TIMER_GHH_
?2?#define?_GHH_TIMER_GHH_????1
?3?
?4?//?File:?ghhTimer.h
?5?//?Date:?2006.08.14
?7?
?8?#include?<ctime>
?9?
10?//?類導出導入類別的符號定義
11?#ifdef?_DLL_FILE_
12?#define?PORTTYE?__declspec(dllexport)?//?導出
13?#else
14?#define?PORTTYE?__declspec(dllimport)?//?導入
15?#endif????//?end?of?_DLL_FILE_
16?
17?/**//****************************************************************************
18??*?類名稱????ghhTimer
19??*?
20??*?描述
21??*????本類對標準庫計時函數進行了封裝，可以實現非常精確的計時，毫秒級別
22??*
23??*?使用說明
24??*????在所要計時程序段之前，調用Start函數，程序段結束時，調用Pause函數，
25??*????多次調用程序段，即可以比較精確的估計程序段的運行時間
26?****************************************************************************/
27?class??PORTTYE?ghhTimer
28?{
29?public:
30?????ghhTimer();
31?
32?public:
33?????bool?Start(void);?
34?????bool?Stop(void);????
35?????bool?Pause(void);
36?????size_t?GetSeconds(void)?const;
37?????size_t?GetMiliSeconds(void)?const;
38?
39?private:
40?????enum?{run?=?1,?stop,?pause}?_Status;
41?????time_t?_Clock;
42?????time_t?_TotalClocks;
43?};
44?
45?#endif?//?end?of?_GHH_TIMER_GHH_ ?1?#ifndef?_DLL_FILE_
??2?#define?_DLL_FILE_
??3?#endif
??4?#include?"ghhTimer.h"
??5?
??6?/**//****************************************************************************
??7??*?about?the?important?function?"clock()"
??8??*?#include?<time.h>
??9??*?clock_t?clock(?void?);
?10??*?The?clock()?function?returns?the?processor?time?since?the?program?started,?
?11??*?or?-1?if?that?information?is?unavailable.?
?12??*?To?convert?the?return?value?to?seconds,?divide?it?by?CLOCKS_PER_SEC.?
?13??*?(Note:?if?your?compiler?is?POSIX?compliant,?
?14??*?then?CLOCKS_PER_SEC?is?always?defined?as?1000000.)
?15??***************************************************************************/
?16?
?17?
?18?//?構造函數，設置初始狀態
?19?ghhTimer::ghhTimer()?:?_Status(stop),?_Clock(0),?_TotalClocks(0)
?20?{
?21?}
?22?
?23?//?當表已經停止或者暫停時啟動停表，成功返回true,否則返回false
?24?bool?ghhTimer::Start(void)
?25?{
?26?????switch?(_Status)
?27?????{
?28?????case?stop?:
?29?????????_TotalClocks?=?0;
?30?????????_Clock?=?clock();
?31?????????break;
?32?
?33?????case?pause?:
?34?????????_Clock?=?clock();
?35?????????break;
?36?
?37?????case?run?:
?38?????????break;
?39?
?40?????default?:
?41?????????return?false;
?42?????}
?43?
?44?????_Status?=?run;
?45?
?46?????return?true;
?47?}
?48?
?49?//?表運行時暫停計時,成功返回true，否則返回false
?50?bool?ghhTimer::Pause(void)
?51?{
?52?????switch?(_Status)
?53?????{
?54?????case?stop?:
?55?????case?pause?:
?56?????????break;
?57?
?58?????case?run?:
?59?????????_TotalClocks?+=?(clock()?-?_Clock);
?60?????????_Clock?=?0;
?61?????????_Status?=?pause;
?62?????????break;
?63?
?64?????default?:
?65?????????return?false;
?66?????}
?67?
?68?????return?true;
?69?}
?70?
?71?//?表運行或暫停時停止計時
?72?bool?ghhTimer::Stop(void)
?73?{
?74?????switch?(_Status)
?75?????{
?76?????case?stop?:
?77?????case?pause?:
?78?????????break;
?79?????????
?80?????case?run?:
?81?????????_TotalClocks?+=(clock()?-?_Clock);
?82?????????_Clock?=?0;
?83?????????break;
?84?
?85?????default?:
?86?????????return?false;
?87?????}
?88?
?89?????_Status?=?stop;
?90?????
?91?????return?true;
?92?}
?93?
?94?//?得到當前積累的秒數
?95?size_t?ghhTimer::GetSeconds(void)?const
?96?{
?97?????time_t?Clocks;
?98?
?99?????switch?(_Status)
100?????{
101?????case?stop:
102?????case?pause:
103?????????Clocks?=?_TotalClocks;
104?????????break;
105?
106?????case?run:
107?????????Clocks?=?_TotalClocks?+?clock()?-?_Clock;
108?????????break;
109?
110?????default:
111?????????return?false;
112?????}
113?????return?(Clocks?/?CLOCKS_PER_SEC);
114?}
115?
116?//?得到當前積累的毫秒數
117?size_t?ghhTimer::GetMiliSeconds(void)?const
118?{
119?????time_t?Clocks;
120?
121?????switch(_Status)
122?????{
123?????case?stop:
124?????case?pause:
125?????????Clocks?=?_TotalClocks;
126?????????break;
127?????case?run:
128?????????Clocks?=?_TotalClocks?+?clock()?-?_Clock;
129?????????break;
130?
131?????default:
132?????????return?false;
133?????}
134?????return?(Clocks?*?1000?/?CLOCKS_PER_SEC);
135?}
136?

轉載于:https://www.cnblogs.com/riky/archive/2007/05/23/757500.html

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