jau::simple_timer Class Reference

A simple timer for timeout and interval applications, using one dedicated service_runner thread per instance. More...

#include <simple_timer.hpp>

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Public Types
typedef simple_timer &	Timer0_ref
typedef function< fraction_i64(Timer0_ref)>	Timer_func
	User defined timer function using custom granularity via fraction_i64.

Public Member Functions
	simple_timer (const simple_timer &o)=delete
	No copy constructor nor move constructor.
	simple_timer (const std::string &name, const fraction_i64 &service_shutdown_timeout) noexcept
	Constructs a new service.
bool	is_running () const noexcept
	Returns true if timer is running.
const std::string &	name () const noexcept
	Return the given name of this timer.
bool	shall_stop () const noexcept
	Returns true if timer shall stop.
bool	start (const fraction_i64 &duration_, Timer_func tofunc) noexcept
	Start the timer with given user Timer_func function and initial duration.
void	start_or_update (const fraction_i64 &duration_, Timer_func tofunc) noexcept
	Start or update the timer with given user Timer_func function and initial duration.
bool	stop () noexcept
	Stop timer, see service_runner::stop()
pthread_t	thread_id () const noexcept
	Return the thread-id of this timer's worker thread, zero if not running.

Detailed Description

A simple timer for timeout and interval applications, using one dedicated service_runner thread per instance.

Discussion: It is contemplated to add an implementation using a unique singleton service_runner for multiple timer instances via event loops.

Definition at line 52 of file simple_timer.hpp.

Member Typedef Documentation

Timer0_ref

typedef simple_timer& jau::simple_timer::Timer0_ref

Definition at line 54 of file simple_timer.hpp.

Timer_func

typedef function<fraction_i64(Timer0_ref)> jau::simple_timer::Timer_func

User defined timer function using custom granularity via fraction_i64.

Function gets invoked for each timer event, i.e. after reaching the duration set earlier.

Returns

duration in fractions of seconds for the next timer event or zero to end the timer thread.

Definition at line 64 of file simple_timer.hpp.

Constructor & Destructor Documentation

simple_timer() [1/2]

simple_timer::simple_timer ( const std::string & name, const fraction_i64 & service_shutdown_timeout )

noexcept

Constructs a new service.

Parameters

name	thread name of this service
service_shutdown_timeout	maximum duration in fractions of seconds to wait for service to stop at stop(), where fractions_i64::zero waits infinitely

Definition at line 61 of file simple_timer.cpp.

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simple_timer() [2/2]

jau::simple_timer::simple_timer ( const simple_timer & o )

delete

No copy constructor nor move constructor.

Parameters

o

Member Function Documentation

name()

const std::string & jau::simple_timer::name ( ) const

inlinenoexcept

Return the given name of this timer.

Definition at line 92 of file simple_timer.hpp.

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thread_id()

pthread_t jau::simple_timer::thread_id ( ) const

inlinenoexcept

Return the thread-id of this timer's worker thread, zero if not running.

Definition at line 97 of file simple_timer.hpp.

is_running()

bool jau::simple_timer::is_running ( ) const

inlinenoexcept

Returns true if timer is running.

Definition at line 102 of file simple_timer.hpp.

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shall_stop()

bool jau::simple_timer::shall_stop ( ) const

inlinenoexcept

Returns true if timer shall stop.

This flag can be used by the Timer_func function to determine whether to skip lengthly tasks.

Definition at line 109 of file simple_timer.hpp.

start()

bool simple_timer::start ( const fraction_i64 & duration_, Timer_func tofunc )

noexcept

Start the timer with given user Timer_func function and initial duration.

Parameters

duration_	initial timer duration in fractions of seconds until next timer event
tofunc	user Timer_func to be called on next timer event

Returns

true if timer has been started, otherwise false implies timer is already running.

Definition at line 66 of file simple_timer.cpp.

start_or_update()

void simple_timer::start_or_update ( const fraction_i64 & duration_, Timer_func tofunc )

noexcept

Start or update the timer with given user Timer_func function and initial duration.

This is faster than calling stop() and start(), however, an already started timer user Timer_func will proceed.

Parameters

duration_	initial timer duration in fractions of seconds until next timer event
tofunc	user Timer_func to be called on next timer event

Definition at line 76 of file simple_timer.cpp.

stop()

bool jau::simple_timer::stop ( )

inlinenoexcept

Stop timer, see service_runner::stop()

Returns

true if timer has been stopped or false if timeout has been hit

Definition at line 136 of file simple_timer.hpp.

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

• include/jau/simple_timer.hpp
• src/simple_timer.cpp