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#include <ctime>
#include <iostream>
#include <iomanip>
#include "Util.h"
#include "Timer.h"
namespace Moses
{
/***
* 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.
*/
double Timer::elapsed_time()
{
#ifdef CLOCK_MONOTONIC
struct timespec now;
clock_gettime(CLOCK_MONOTONIC, &now);
double elapsed = (now.tv_sec - start_time.tv_sec);
elapsed += (now.tv_nsec - start_time.tv_nsec) / 1000000000.0;
return elapsed;
#else
time_t now;
time(&now);
return difftime(now, start_time);
#endif
}
/***
* 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 Timer::get_elapsed_time()
{
return elapsed_time();
}
/***
* Start a timer. If it is already running, let it continue running.
* Print an optional message.
*/
void Timer::start(const char* msg)
{
// Print an optional message, something like "Starting timer t";
if (msg) TRACE_ERR( msg << std::endl);
// Return immediately if the timer is already running
if (running) return;
// Change timer status to running
running = true;
// Set the start time;
#ifdef CLOCK_MONOTONIC
clock_gettime(CLOCK_MONOTONIC, &start_time);
#else
time(&start_time);
#endif
}
/***
* Turn the timer off and start it again from 0. Print an optional message.
*/
/*
inline void Timer::restart(const char* msg)
{
// Print an optional message, something like "Restarting timer t";
if (msg) TRACE_ERR( msg << std::endl;
// Set the timer status to running
running = true;
// Set the accumulated time to 0 and the start time to now
acc_time = 0;
start_clock = clock();
start_time = time(0);
}
*/
/***
* Stop the timer and print an optional message.
*/
/*
inline void Timer::stop(const char* msg)
{
// Print an optional message, something like "Stopping timer t";
check(msg);
// Recalculate and store the total accumulated time up until now
if (running) acc_time += elapsed_time();
running = false;
}
*/
/***
* Print out an optional message followed by the current timer timing.
*/
void Timer::check(const char* msg)
{
// Print an optional message, something like "Checking timer t";
if (msg) TRACE_ERR( msg << " : ");
// TRACE_ERR( "[" << std::setiosflags(std::ios::fixed) << std::setprecision(2) << (running ? elapsed_time() : 0) << "] seconds\n");
TRACE_ERR( "[" << (running ? elapsed_time() : 0) << "] seconds\n");
}
/***
* 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".
*/
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;
}
}
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