keyws — Tue, 29 Aug 2006 01:51:00 GMT

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 // �c�d��出导入类别的�W�号定义
11 #ifdef _DLL_FILE_
12 #define PORTTYE __declspec(dllexport) // 导出
13 #else
14 #define PORTTYE __declspec(dllimport) // 导入
15 #endif    // end of _DLL_FILE_
16
17 /****************************************************************************
18  * �c�d��U�W�   ghhTimer
19  *
20  * 描述
21  *    本类�Ҏ(gu��)��准库计时函数�q�行了封装，可以实现非常�_��的计�Ӟ��毫秒�U�别
22  *
23  * 使用说明
24  *    在所要计时程序段之前�Q�调用Start函数�Q�程序段�l�束�Ӟ��调用Pause函数�Q?br />25  *    多次调用�E�序�D�，卛_��以比较精��的估计�E�序�D늚��q�行旉��
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
  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 // 构造函敎ͼ�讄��初始状�?/span>
19 ghhTimer::ghhTimer() : _Status(stop), _Clock(0), _TotalClocks(0)
20 {
21 }
22
23 // 当表已经停止或者暂停时启动停表�Q�成功返回true,否则�q�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 // 表运行时暂停计时,成功�q�回true�Q�否则返回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 // 表运行或暂停时停止计�?/span>
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 // 得到当前�U�篏的秒�?/span>
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 // 得到当前�U�篏的毫�U�数
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

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