OSD_Chronometer Class Reference

This class measures CPU time (both user and system) consumed
by current process or thread. The chronometer can be started
and stopped multiple times, and measures cumulative time.

If only the thread is measured, calls to Stop() and Show()
must occur from the same thread where Start() was called
(unless chronometer is stopped); otherwise measurement will
yield false values.
More...

#include <OSD_Chronometer.hxx>

Inheritance diagram for OSD_Chronometer:

Public Member Functions
	OSD_Chronometer (const Standard_Boolean ThisThreadOnly=Standard_False)
	Initializes a stopped Chronometer. <br> If ThisThreadOnly is True, measured CPU time will account time of the current thread only; otherwise CPU of the process (all threads, and completed children) is measured. More...
virtual void	Destroy ()
	~OSD_Chronometer ()
virtual void	Reset ()
	Stops and Reinitializes the Chronometer. More...
virtual void	Stop ()
	Stops the Chronometer. More...
virtual void	Start ()
	Starts (after Create or Reset) or restarts (after Stop) the chronometer. More...
virtual void	Show ()
	Shows the current CPU user and system time on the standard output stream <cout>. The chronometer can be running (laps Time) or stopped. More...
virtual void	Show (Standard_OStream &os)
	Shows the current CPU user and system time on the output stream <os>. The chronometer can be running (laps Time) or stopped. More...
void	Show (Standard_Real &UserSeconds)
	Returns the current CPU user time in a variable. The chronometer can be running (laps Time) or stopped. More...
void	Show (Standard_Real &UserSeconds, Standard_Real &SystemSeconds)
	Returns the current CPU user and system time in variables. The chronometer can be running (laps Time) or stopped. More...

Static Public Member Functions
static void	GetProcessCPU (Standard_Real &UserSeconds, Standard_Real &SystemSeconds)
	Returns CPU time (user and system) consumed by the current process since its start, in seconds. The actual precision of the measurement depends on granularity provided by the system, and is platform-specific. More...
static void	GetThreadCPU (Standard_Real &UserSeconds, Standard_Real &SystemSeconds)
	Returns CPU time (user and system) consumed by the current thread since its start. Note that this measurement is platform-specific, as threads are implemented and managed differently on different platforms and CPUs. More...

Protected Attributes
Standard_Boolean	Stopped

Detailed Description

This class measures CPU time (both user and system) consumed
by current process or thread. The chronometer can be started
and stopped multiple times, and measures cumulative time.

If only the thread is measured, calls to Stop() and Show()
must occur from the same thread where Start() was called
(unless chronometer is stopped); otherwise measurement will
yield false values.

Constructor & Destructor Documentation

OSD_Chronometer::OSD_Chronometer

(

const Standard_Boolean

ThisThreadOnly = Standard_False

)

 Initializes a stopped Chronometer. <br>

If ThisThreadOnly is True, measured CPU time will account
time of the current thread only; otherwise CPU of the
process (all threads, and completed children) is measured.

OSD_Chronometer::~OSD_Chronometer ( )

inline

Member Function Documentation

virtual void OSD_Chronometer::Destroy ( )

virtual

static void OSD_Chronometer::GetProcessCPU ( Standard_Real &  UserSeconds, Standard_Real &  SystemSeconds  )

static

Returns CPU time (user and system) consumed by the current
process since its start, in seconds. The actual precision of
the measurement depends on granularity provided by the system,
and is platform-specific.

static void OSD_Chronometer::GetThreadCPU ( Standard_Real &  UserSeconds, Standard_Real &  SystemSeconds  )

static

Returns CPU time (user and system) consumed by the current
thread since its start. Note that this measurement is
platform-specific, as threads are implemented and managed
differently on different platforms and CPUs.

virtual void OSD_Chronometer::Reset ( )

virtual

Stops and Reinitializes the Chronometer.

Reimplemented in OSD_Timer.

virtual void OSD_Chronometer::Show ( )

virtual

Shows the current CPU user and system time on the
standard output stream <cout>.
The chronometer can be running (laps Time) or stopped.

Reimplemented in OSD_Timer.

virtual void OSD_Chronometer::Show ( Standard_OStream &  os )

virtual

Shows the current CPU user and system time on the output
stream <os>.
The chronometer can be running (laps Time) or stopped.

Reimplemented in OSD_Timer.

void OSD_Chronometer::Show

(

Standard_Real &

UserSeconds

)

Returns the current CPU user time in a variable.
The chronometer can be running (laps Time) or stopped.

void OSD_Chronometer::Show	(	Standard_Real &	UserSeconds,
		Standard_Real &	SystemSeconds
	)

Returns the current CPU user and system time in variables.
The chronometer can be running (laps Time) or stopped.

virtual void OSD_Chronometer::Start ( )

virtual

Starts (after Create or Reset) or restarts (after Stop)
the chronometer.

Reimplemented in OSD_Timer.

virtual void OSD_Chronometer::Stop ( )

virtual

Stops the Chronometer.

Reimplemented in OSD_Timer.

Field Documentation

Standard_Boolean OSD_Chronometer::Stopped

protected

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The documentation for this class was generated from the following file:

• OSD_Chronometer.hxx