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5e0577a042
I need a layer somewhere between AK (usable both by userspace and kernel) and LibGUI (usable by userspace except WindowServer.) So here's LibCore.
30 lines
710 B
C++
30 lines
710 B
C++
#include <LibCore/CElapsedTimer.h>
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#include <AK/Assertions.h>
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#include <sys/time.h>
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void CElapsedTimer::start()
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{
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m_valid = true;
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gettimeofday(&m_start_time, nullptr);
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}
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inline void timersub(const struct timeval* a, const struct timeval* b, struct timeval* result)
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{
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result->tv_sec = a->tv_sec - b->tv_sec;
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result->tv_usec = a->tv_usec - b->tv_usec;
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if (result->tv_usec < 0) {
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--result->tv_sec;
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result->tv_usec += 1000000;
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}
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}
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int CElapsedTimer::elapsed() const
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{
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ASSERT(is_valid());
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struct timeval now;
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gettimeofday(&now, nullptr);
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struct timeval diff;
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timersub(&now, &m_start_time, &diff);
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return diff.tv_sec * 1000 + diff.tv_usec / 1000;
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}
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