mm::node::DeviceHandle Class Reference

One device, plus the set that keeps it alive. More...

#include <device_manager.h>

Public Member Functions
	DeviceHandle ()=default
	DeviceHandle (std::shared_ptr< DeviceSet > set, Device *device)
	operator bool () const
	Whether a device was found.
Device &	operator* () const
Device *	operator-> () const
Device *	get () const
	The device, or nullptr. For a caller that must pass it on as a pointer.

Detailed Description

One device, plus the set that keeps it alive.

What DeviceManager::deviceAt hands back. The handle is the lifetime: while you hold it, the Device it names stays constructed and its parameter map stays put, whatever scan or reset do meanwhile. A bare deviceSet()->find(pos) would dangle the moment the temporary set pointer died, which is the mistake this type exists to make unwritable.

Falsy when the position resolved to no device. Dereferencing then is undefined, exactly as for a null pointer.

Constructor & Destructor Documentation

DeviceHandle() [1/2]

mm::node::DeviceHandle::DeviceHandle ( )

default

DeviceHandle() [2/2]

mm::node::DeviceHandle::DeviceHandle ( std::shared_ptr< DeviceSet >  set, Device *  device  )

inline

Member Function Documentation

get()

Device * mm::node::DeviceHandle::get ( ) const

inline

The device, or nullptr. For a caller that must pass it on as a pointer.

operator bool()

mm::node::DeviceHandle::operator bool ( ) const

inlineexplicit

Whether a device was found.

operator*()

Device & mm::node::DeviceHandle::operator* ( ) const

inline

operator->()

Device * mm::node::DeviceHandle::operator-> ( ) const

inline

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

• libs/node/device_manager.h