kouta::base::Component Class Reference

Base class for asynchronous components. More...

#include <component.hpp>

Inheritance diagram for kouta::base::Component:

Collaboration diagram for kouta::base::Component:

Public Member Functions
	Component ()=delete
	Component (Component *parent)
	Constructor.
	Component (const Component &)=delete
Component &	operator= (const Component &)=delete
	Component (Component &&)=delete
Component &	operator= (Component &&)=delete
virtual	~Component ()
	Component destructor.
virtual asio::io_context &	context ()
	Obtain a reference to the underlying I/O context.
void	add_child (Component *component)
	Add a child component to the list.
void	remove_child (Component *component)
	Remove a child component from the list.
template<class TClass , class... TMethodArgs, class... TArgs>
void	post (void(TClass::*method)(TMethodArgs...), TArgs... args)
	Post a method call to the event loop for deferred execution.
template<class... TFuncArgs, class... TArgs>
void	post (const std::function< void(TFuncArgs...)> &functor, TArgs... args)
	Post a function call to the event loop for deferred execution.
template<class TFunctor >
void	post (TFunctor &&functor)
	Post a functor call to the event loop for deferred execution.

Private Attributes
Component *	m_parent
std::vector< Component * >	m_children

Detailed Description

Base class for asynchronous components.

A component provies access to the underlying event loop which, by default, belongs to the parent component. Moreover, specifying a parent will add the component to its children list and make sure that the component is deleted when the parent is destroyed (if the component was allocated on the heap).

Constructor & Destructor Documentation

Component() [1/4]

kouta::base::Component::Component ( )

delete

Component() [2/4]

kouta::base::Component::Component ( Component *  parent )

inlineexplicit

Constructor.

Parameters

[in]

parent

Parent component. The lifetime of the parent must surpass that of the child.

Component() [3/4]

kouta::base::Component::Component ( const Component &  )

delete

Component() [4/4]

kouta::base::Component::Component ( Component &&  )

delete

~Component()

virtual kouta::base::Component::~Component ( )

inlinevirtual

Component destructor.

The component will go through its list of children and delete them one at a time. This is only useful if the components were allocated in the heap, as stack-allocated ones will probably have been deleted automatically prior to calling this destructor.

In addition, once a component has deleted its children, it will remove itself from its parent.

Note

Child deletion happens in reverse order.

Member Function Documentation

add_child()

void kouta::base::Component::add_child ( Component *  component )

inline

Add a child component to the list.

This is used to keep track of objects to delete when the component has been allocated in the heap.

Note

Normally, this will only be called from the Constructor of the component.

Parameters

[in]

component

Pointer to the component to add.

context()

virtual asio::io_context & kouta::base::Component::context ( )

inlinevirtual

Obtain a reference to the underlying I/O context.

Note

By default, this I/O context comes from the parent component.

Reimplemented in kouta::base::Root.

operator=() [1/2]

Component & kouta::base::Component::operator= ( Component &&  )

delete

operator=() [2/2]

Component & kouta::base::Component::operator= ( const Component &  )

delete

post() [1/3]

template<class... TFuncArgs, class... TArgs>

void kouta::base::Component::post ( const std::function< void(TFuncArgs...)> &  functor, TArgs...  args  )

inline

Post a function call to the event loop for deferred execution.

This allows other components, even those residing in another thread/event loop, to post a function to this specific component.

Warning

Arguments are copied before being passed to the event loop.

Template Parameters

TFuncArgs	Types of the arguments that the function accepts.
TArgs	Types of the arguments provided to the invocation.

Parameters

[in]	functor	Functor to invoke. Its signature must match void(TArgs...)
[in]	args	Arguments to invoke the functor with.

post() [2/3]

template<class TFunctor >

void kouta::base::Component::post ( TFunctor &&  functor )

inline

Post a functor call to the event loop for deferred execution.

This allows other components, even those residing in another thread/event loop, to post a functor to this specific component, for example a lambda.

Template Parameters

TFunctor

Functor type.

Parameters

[in]

functor

Functor to invoke.s

post() [3/3]

template<class TClass , class... TMethodArgs, class... TArgs>

void kouta::base::Component::post ( void(TClass::*)(TMethodArgs...)  method, TArgs...  args  )

inline

Post a method call to the event loop for deferred execution.

This allows other components, even those residing in another thread/event loop, to post a call to this specific component.

Warning

Arguments are copied before being passed to the event loop.

Template Parameters

TClass	Child class whose method is going to be invoked.
TMethodArgs	Types of the arguments that the method accepts.
TArgs	Types of the arguments provided to the invocation.

Parameters

[in]	method	Method to invoke. Its signature must match void(TArgs...)
[in]	args	Arguments to invoke the method with.

remove_child()

void kouta::base::Component::remove_child ( Component *  component )

inline

Remove a child component from the list.

When a child is removed, the parent component will not attempt to delete it itself. Note that when a component allocated in the stack is destroyed, it will remove itself from the list and prevent double-free issues.

Member Data Documentation

m_children

std::vector<Component*> kouta::base::Component::m_children

private

m_parent

Component* kouta::base::Component::m_parent

private

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

• include/kouta/base/component.hpp