fun::WallClock Class Reference

Clock roughly representing wall clock. More...

#include <wall_clock.h>

Inheritance diagram for fun::WallClock:

Public Types
typedef boost::posix_time::time_duration	Duration
typedef boost::posix_time::ptime	Value

Static Public Member Functions
static WallClock::Value	FromMonotonicClock (const MonotonicClock::Value &mono_clock)
static Duration	FromMsec (int64_t msec)
	Converts msec value into Duration.
static Duration	FromSec (int64_t sec)
	Converts sec value into Duration.
static WallClock::Value	FromTimestampInMsec (int64_t timestamp_in_msec)
static WallClock::Value	FromTimestampInSec (int64_t timestamp_in_second)
static WallClock::Value	FromTimestampInUsec (int64_t timestamp_in_usec)
static bool	FromTimestring (const string &timestring, WallClock::Value *value)
static Duration	FromUsec (int64_t usec)
	Converts usec value into Duration.
static string	GetLocalTimestring ()
static string	GetLocalTimestring (const WallClock::Value &value)
static WallClock::Value	GetProcessStartTime ()
static WallClock::Duration	GetProcessUptime ()
static int64_t	GetTimestampInMsec ()
static int64_t	GetTimestampInMsec (const WallClock::Value &value)
static int64_t	GetTimestampInSec ()
static int64_t	GetTimestampInSec (const WallClock::Value &value)
static int64_t	GetTimestampInUsec ()
static int64_t	GetTimestampInUsec (const WallClock::Value &value)
static string	GetTimestring ()
static string	GetTimestring (const WallClock::Value &value)
static bool	Install (const ArgumentMap &arguments)
static WallClock::Value	Now ()
static MonotonicClock::Value	ToMonotonicClock (const WallClock::Value &wall_clock)
static bool	Uninstall ()
Static Public Member Functions inherited from fun::Component
static const ArgumentMap *	FindArgument (const string &component_name)

Static Public Attributes
static const Duration	kEmptyDuration
	the value of 00:00:00.000000
static const Value	kEpochClock
	The value of time_t(0), 1970-01-01 00:00:00.000000 UTC.

Detailed Description

WallClock is provided for MonotonicClock is not very human-readable. WallClock is synchronized with the system time(wall clock time) during bootstrapping and increases monotonically. Hence, there can be time drift between WallClock and system time. It provides microsecond granularity.

Member Function Documentation

FromMonotonicClock()

static WallClock::Value fun::WallClock::FromMonotonicClock ( const MonotonicClock::Value &  mono_clock )

static

Returns

WallClock::Value from the given MonotonicClock::Value.

ToMonotonicClock()

static MonotonicClock::Value fun::WallClock::ToMonotonicClock ( const WallClock::Value &  wall_clock )

static

Returns

MonotonicClock::Value from the given WallClock::Value.