75 lines
1.9 KiB
C++
75 lines
1.9 KiB
C++
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#include "session/Timer.hpp"
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#include <time.h>
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#include <strings.h>
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using namespace std;
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long long Timer::fixedTime;
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bool Timer::useRealTime(true);
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long long Timer::now()
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{
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if (!useRealTime) return fixedTime;
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struct timespec ts;
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clock_gettime(Timer::getClock(), &ts);
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return static_cast<long long>(ts.tv_sec) * 1000 + static_cast<long long>(ts.tv_nsec) / 1000000;
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}
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clockid_t Timer::getClock()
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{
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return CLOCK_REALTIME;
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}
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long long Timer::msDiff(long long compareTime)
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{
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return now() - compareTime;
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}
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void Timer::setTime(const string& time)
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throw (ParameterSyntaxException)
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{
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const char* format = "%Y%m%d.%H%M%S";
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if (time == "")
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{
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// Revert to wall time for later calls.
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useRealTime = true;
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return;
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}
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// On success, strptime() should return a pointer to the address of the
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// null char.
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struct tm tm;
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bzero(&tm, sizeof(tm));
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// We do not scan for the 'daylight saving setting', so explicitly
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// undefine it.
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tm.tm_isdst = -1;
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time_t t;
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const char* res = strptime(time.c_str(), format, &tm);
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if (res == NULL || res != time.c_str() + time.size() || (t = mktime(&tm)) == -1)
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{
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throw ParameterSyntaxException(
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"Time '" + time + "' not in form 'YYYYMMDD.hhmmss' or is an illegal time.");
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}
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// mktime is in seconds, Date in milli.
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fixedTime = static_cast<long long>(t) * 1000L;
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useRealTime = false;
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}
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struct timespec Timer::msOffset2abs(long long msOffset)
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{
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const unsigned int ms_per_sec = 1000;
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const unsigned int ns_per_ms = 1000;
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struct timespec now;
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struct timespec until;
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clock_gettime(Timer::getClock(), &now);
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until.tv_sec = now.tv_sec + msOffset / ms_per_sec;
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until.tv_nsec = now.tv_nsec + msOffset * ns_per_ms;
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return until;
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}
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