blob: 403547620df1721aa80718ca25b4c82a4a6d4eaa (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
|
#ifndef TIMER_H
#define TIMER_H
#include <ctime>
#include <iostream>
#include <iomanip>
class Timer
{
/**
* Allow timers to be printed to ostreams using the syntax 'os << t'
* for an ostream 'os' and a timer 't'. For example, "cout << t" will
* print out the total amount of time 't' has been "running".
*/
friend std::ostream& operator<<(std::ostream& os, Timer& t);
private:
bool running;
time_t start_time;
/**
* Return the total time that the timer has been in the "running"
* state since it was first "started" or last "restarted". For
* "short" time periods (less than an hour), the actual cpu time
* used is reported instead of the elapsed time.
* TODO in seconds?
*/
double elapsed_time();
public:
/**
* 'running' is initially false. A timer needs to be explicitly started
* using 'start' or 'restart'.
*/
Timer() : running(false), start_time(0) { }
/**
* Start a timer. If it is already running, let it continue running.
* Print an optional message.
*/
void start(const char* msg = 0);
// void restart(const char* msg = 0);
// void stop(const char* msg = 0);
/**
* Print out an optional message followed by the current timer timing.
*/
void check(const char* msg = 0);
/**
* Return the total time that the timer has been in the "running"
* state since it was first "started" or last "restarted". For
* "short" time periods (less than an hour), the actual cpu time
* used is reported instead of the elapsed time.
* This function is the public version of elapsed_time()
*/
double get_elapsed_time();
};
inline std::ostream& operator<<(std::ostream& os, Timer& t)
{
//os << std::setprecision(2) << std::setiosflags(std::ios::fixed) << (t.running ? t.elapsed_time() : 0);
os << (t.running ? t.elapsed_time() : 0);
return os;
}
#endif // TIMER_H
|
