time_util.h File Reference

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Detailed Description

Inline functions for manipulating time values.

Definition in file time_util.h.

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Defines
#define	MICROS_PER_SECOND   1000000
	The number of microseconds per second.
#define	NANOS_PER_MICRO   1000
	The number of nanoseconds per microsecond.
#define	tscmp(tvp, uvp, cmp)
	Compare two timespec's.
Functions
timespec	microsec_to_timespec (unsigned long long microseconds)
	Convert a microsecond value to a struct timespec.
unsigned long long	timespec_to_microsec (struct timespec *time_spec)
	Convert a timespec to a microsecond value.
int	string_to_microsec (unsigned long long *us_out, const char *str)
	Convert a string to a microsecond value.

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Define Documentation

#define tscmp (  tvp, uvp, cmp   )

Value: (((tvp)->tv_sec == (uvp)->tv_sec) ? \ ((tvp)->tv_nsec cmp (uvp)->tv_nsec) : \ ((tvp)->tv_sec cmp (uvp)->tv_sec)) Compare two timespec's. Parameters: tvp  Pointer to the first timespec. uvp  Pointer to the second timespec. cmp  The comparison operator. Definition at line 95 of file time_util.h. Referenced by rk_cpu_reserve_attr_valid(), rk_cpu_reserve_ctl(), and rk_next_tick().

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Function Documentation

struct timespec microsec_to_timespec (  unsigned long long  microseconds  )  [inline, static]

Convert a microsecond value to a struct timespec. Parameters: microseconds  The microsecond value to convert. Returns: A timespec that represents the given number of microseconds. Definition at line 44 of file time_util.h. References MICROS_PER_SECOND, microsec_to_timespec(), and NANOS_PER_MICRO. Referenced by RKTask::BeginCPUScheduling(), microsec_to_timespec(), rk_cpu_reserve_create(), rk_cpu_reserve_tick(), RKTask::RKTask(), and RKTask::SetComputeTime().

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int string_to_microsec (  unsigned long long *  us_out, const char *  str )

Convert a string to a microsecond value. The string format is a number followed by an optional unit notation, where microseconds is the default unit. For example: 10 = 10 microseconds 10us = 10 microseconds 10ms = 10,000 microseconds 10s = 10,000,000 microseconds Parameters: us_out  The destination for the microsecond value. str  The string to parse. Returns: True if the string was successfully parsed, false otherwise. Definition at line 29 of file time_util.c. References ensure, and require. Referenced by RKTask::BeginCPUScheduling(), StubRealTimeTask::BeginCPUScheduling(), bfRealTimeTaskHey(), paProcessOptions(), and rktProcessOptions().

unsigned long long timespec_to_microsec (  struct timespec *  time_spec  )  [inline, static]

Convert a timespec to a microsecond value. NOTE: There is a loss of precision in the conversion. Parameters: time_spec  The timespec to convert. Returns: The number of microseconds specified by the timespec. Definition at line 61 of file time_util.h. References MICROS_PER_SECOND, NANOS_PER_MICRO, and require. Referenced by c1_pre(), RKTask::Deadline(), RKTask::GetComputeTime(), RKTask::Period(), BasicDelegate::postcall(), RKTask::ReportCPU(), rk_cpu_reserve_create(), rk_cpu_reserve_tick(), and rk_stub_next_tick().

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