91 lines
2.6 KiB
C++
91 lines
2.6 KiB
C++
#include <ctime>
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#include "fsfw/ipc/MutexGuard.h"
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#include "fsfw/timemanager/Clock.h"
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uint16_t Clock::leapSeconds = 0;
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MutexIF* Clock::timeMutex = nullptr;
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bool Clock::leapSecondsSet = false;
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ReturnValue_t Clock::convertUTCToTT(timeval utc, timeval* tt) {
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uint16_t leapSeconds;
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ReturnValue_t result = getLeapSeconds(&leapSeconds);
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if (result != HasReturnvaluesIF::RETURN_OK) {
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return result;
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}
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timeval leapSeconds_timeval = {0, 0};
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leapSeconds_timeval.tv_sec = leapSeconds;
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// initial offset between UTC and TAI
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timeval UTCtoTAI1972 = {10, 0};
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timeval TAItoTT = {32, 184000};
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*tt = utc + leapSeconds_timeval + UTCtoTAI1972 + TAItoTT;
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t Clock::setLeapSeconds(const uint16_t leapSeconds_) {
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if (checkOrCreateClockMutex() != HasReturnvaluesIF::RETURN_OK) {
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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MutexGuard helper(timeMutex);
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leapSeconds = leapSeconds_;
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leapSecondsSet = true;
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t Clock::getLeapSeconds(uint16_t* leapSeconds_) {
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if (not leapSecondsSet) {
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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if (checkOrCreateClockMutex() != HasReturnvaluesIF::RETURN_OK) {
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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MutexGuard helper(timeMutex);
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*leapSeconds_ = leapSeconds;
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t Clock::convertTimevalToTimeOfDay(const timeval* from, TimeOfDay_t* to) {
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struct tm* timeInfo;
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// According to https://en.cppreference.com/w/c/chrono/gmtime, the implementation of gmtime_s
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// in the Windows CRT is incompatible with the C standard but this should not be an issue for
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// this implementation
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ReturnValue_t result = checkOrCreateClockMutex();
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if (result != HasReturnvaluesIF::RETURN_OK) {
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return result;
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}
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MutexGuard helper(timeMutex);
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// gmtime writes its output in a global buffer which is not Thread Safe
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// Therefore we have to use a Mutex here
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timeInfo = gmtime(&from->tv_sec);
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to->year = timeInfo->tm_year + 1900;
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to->month = timeInfo->tm_mon + 1;
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to->day = timeInfo->tm_mday;
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to->hour = timeInfo->tm_hour;
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to->minute = timeInfo->tm_min;
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to->second = timeInfo->tm_sec;
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to->usecond = from->tv_usec;
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return HasReturnvaluesIF::RETURN_OK;
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}
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ReturnValue_t Clock::checkOrCreateClockMutex() {
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if (timeMutex == nullptr) {
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MutexFactory* mutexFactory = MutexFactory::instance();
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if (mutexFactory == nullptr) {
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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timeMutex = mutexFactory->createMutex();
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if (timeMutex == nullptr) {
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return HasReturnvaluesIF::RETURN_FAILED;
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}
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}
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return HasReturnvaluesIF::RETURN_OK;
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}
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