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59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
#ifndef moses_Time_H
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#define moses_Time_H
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#include <ctime>
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#include <iostream>
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#include <iomanip>
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#include "Util.h"
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namespace Moses
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{
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/** Wrapper around time_t to time how long things have been running
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* according to walltime. We avoid CPU time since it is less reliable
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* in a multi-threaded environment and can spuriously include clock cycles
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* used by other threads in the same process.
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*/
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class Timer
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{
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friend std::ostream& operator<<(std::ostream& os, Timer& t);
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private:
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bool running;
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// note: this only has the resolution of seconds, we'd often like better resolution
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// we make our best effort to do this on a system-by-system basis
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#ifdef CLOCK_MONOTONIC
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struct timespec start_time;
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#else
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time_t start_time;
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#endif
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// in seconds
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double elapsed_time();
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public:
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/***
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* 'running' is initially false. A timer needs to be explicitly started
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* using 'start' or 'restart'
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*/
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Timer() : running(false) {
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#ifdef CLOCK_MONOTONIC
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start_time.tv_sec = 0;
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start_time.tv_nsec = 0;
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#else
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start_time = 0;
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#endif
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}
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void start(const char* msg = 0);
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// void restart(const char* msg = 0);
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// void stop(const char* msg = 0);
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void check(const char* msg = 0);
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double get_elapsed_time();
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};
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}
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#endif
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