90 lines
2.3 KiB
C++
90 lines
2.3 KiB
C++
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//( { file_desc:"Time cand clock related functions." kw: [ time system ] }
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//
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//
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// This interface is used to read the systems high resolution timer and
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// calculate elapsed time.
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//)
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#ifndef cwTime_H
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#define cwTime_H
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namespace cw
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{
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namespace time
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{
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//(
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typedef struct timespec spec_t;
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// Get the time
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void get( spec_t& tRef );
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// Return the elapsed time (t1 - t0) in microseconds
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// t1 is assumed to be at a later time than t0.
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unsigned elapsedMicros( const spec_t& t0, const spec_t& t1 );
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unsigned elapsedMicros( const spec_t& t0 );
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// Wrapper on elapsedMicros()
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unsigned elapsedMs( const spec_t& t0, const spec_t& t1 );
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unsigned elapsedMs( const spec_t& t0 );
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// Wrapper on elapsedMicros()
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double elapsedSecs( const spec_t& t0, const spec_t& t1 );
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double elapsedSecs( const spec_t& t0 );
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// Same as elapsedMicros() but the times are not assumed to be ordered.
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// The function therefore begins by swapping t1 and t0 if t0 is after t1.
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unsigned absElapsedMicros( const spec_t& t0, const spec_t& t1 );
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// Same as elapsedMicros() but returns a negative value if t0 is after t1.
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int diffMicros( const spec_t& t0, const spec_t& t1 );
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// Returns true if t0 <= t1.
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bool isLTE( const spec_t& t0, const spec_t& t1 );
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// Returns true if t0 < t1.
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bool isLT( const spec_t& t0, const spec_t& t1 );
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// Return true if t0 >= t1.
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bool isGTE( const spec_t& t0, const spec_t& t1 );
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// Return true if t0 > t1.
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bool isGT( const spec_t& t0, const spec_t& t1 );
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bool isEqual( const spec_t& t0, const spec_t& t1 );
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bool isZero( const spec_t& t0 );
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void setZero( spec_t& t0 );
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rc_t now( spec_t& ts );
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void subtractMicros( spec_t& ts, unsigned us );
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// Advance 'ts' by 'us/'ms' microseconds/milliseconds.
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void advanceMicros( spec_t& ts, unsigned us );
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void advanceMs( spec_t& ts, unsigned ms );
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// Advance the current time by 'ms' milliseconds;
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rc_t futureMs( spec_t& ts, unsigned ms );
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void secondsToSpec( spec_t& ts, unsigned sec );
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double specToSeconds( const spec_t& ts );
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void millisecondsToSpec( spec_t& ts, unsigned ms );
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void microsecondsToSpec( spec_t& ts, unsigned us );
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rc_t test();
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//)
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}
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}
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#endif
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