skia2/bench/BenchSysTimer_posix.cpp

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#include "BenchSysTimer_posix.h"
//Time
#include <time.h>
static double intervalInMSec(const timespec start_clock
, const timespec end_clock)
{
double duration_clock;
if ((end_clock.tv_nsec - start_clock.tv_nsec) < 0) {
duration_clock = (end_clock.tv_sec - start_clock.tv_sec-1)*1000;
duration_clock += (1000000000 + end_clock.tv_nsec - start_clock.tv_nsec)
/ 1000000.0;
} else {
duration_clock = (end_clock.tv_sec - start_clock.tv_sec)*1000;
duration_clock += (end_clock.tv_nsec - start_clock.tv_nsec) / 1000000.0;
}
return duration_clock;
}
void BenchSysTimer::startWall() {
if (-1 == clock_gettime(CLOCK_MONOTONIC, &this->fWall)) {
timespec none = {0, 0};
this->fWall = none;
}
}
void BenchSysTimer::startCpu() {
if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &this->fCpu)) {
timespec none = {0, 0};
this->fCpu = none;
}
}
double BenchSysTimer::endCpu() {
timespec end_cpu;
if (-1 == clock_gettime(CLOCK_PROCESS_CPUTIME_ID, &end_cpu)) {
timespec none = {0, 0};
end_cpu = none;
}
return intervalInMSec(this->fCpu, end_cpu);
}
double BenchSysTimer::endWall() {
timespec end_wall;
if (-1 == clock_gettime(CLOCK_MONOTONIC, &end_wall)) {
timespec none = {0, 0};
end_wall = none;
}
return intervalInMSec(this->fWall, end_wall);
}