24 рядки
565 B
C
24 рядки
565 B
C
#include "cmPrefix.h"
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#include "cmGlobal.h"
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#include "cmTime.h"
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void cmTimeGet( cmTimeSpec_t* t )
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{ clock_gettime(CLOCK_REALTIME,t); }
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// this assumes that the seconds have been normalized to a recent start time
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// so as to avoid overflow
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unsigned cmTimeElapsedMicros( const cmTimeSpec_t* t0, const cmTimeSpec_t* t1 )
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{
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// convert seconds to usecs
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long u0 = t0->tv_sec * 1000000;
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long u1 = t1->tv_sec * 1000000;
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// convert nanoseconds to usec
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u0 += t0->tv_nsec / 1000;
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u1 += t1->tv_nsec / 1000;
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// take diff between t1 and t0
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return u1 - u0;
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}
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