PedTimer

A PedTimer keeps track of the progress of a single (possibly compound) operation. More...

Files
file	timer.h
Data Structures
struct	_PedTimer
Defines
#define	PED_TIMER_START_DELAY   2
Typedefs
typedef _PedTimer	PedTimer
typedef void	PedTimerHandler (PedTimer *timer, void *context)
Functions
void	ped_timer_destroy (PedTimer *timer)
	Destroys a timer.
void	ped_timer_destroy_nested (PedTimer *timer)
	Destroys a nested timer.
PedTimer *	ped_timer_new (PedTimerHandler *handler, void *context)
	Creates a timer.
PedTimer *	ped_timer_new_nested (PedTimer *parent, float nest_frac)
	Creates a new nested timer.
void	ped_timer_reset (PedTimer *timer)
void	ped_timer_set_state_name (PedTimer *timer, const char *state_name)
void	ped_timer_touch (PedTimer *timer)
void	ped_timer_update (PedTimer *timer, float frac)

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Detailed Description

A PedTimer keeps track of the progress of a single (possibly compound) operation.

The user of libparted constructs a PedTimer, and passes it to libparted functions that are likely to be expensive operations (like ped_file_system_resize). Use of timers is optional... you may pass NULL instead.

When you create a PedTimer, you must specify a timer handler function. This will be called when there's an update on how work is progressing.

Timers may be nested. When a timer is constructed, you can choose to assign it a parent, along with an estimate of what proportion of the total (parent's) time will be used in the nested operation. In this case, the nested timer's handler is internal to libparted, and simply updates the parent's progress, and calls its handler.

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Function Documentation

PedTimer * ped_timer_new	(	PedTimerHandler *	handler,
		void *	context
	)

Creates a timer.

Context will be passed in the context argument to the handler, when it is invoked.

Returns:

a new PedTimer

PedTimer * ped_timer_new_nested	(	PedTimer *	parent,
		float	nest_frac
	)

Creates a new nested timer.

This function creates a "nested" timer that describes the progress of a subtask. parent is the parent timer, and nested_frac is the estimated proportion (between 0 and 1) of the time that will be spent doing the nested timer's operation. The timer should only be constructed immediately prior to starting the nested operation. (It will be inaccurate, otherwise). Updates to the progress of the subtask are propagated back through to the parent task's timer.

Returns:

nested timer

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