This class manages the lifecycle of a plugin instance. It can receive a plugin instance from the Loader class or by copy-construction or assignment from another PluginPtr instance. More...

#include <PluginPtr.hh>

Public Member Functions
	TemplatePluginPtr ()
	Default constructor. Creates a PluginPtr object that does not point to any plugin instance. IsEmpty() will return true until a plugin instance is provided.

	TemplatePluginPtr (const TemplatePluginPtr &_other)
	Copy constructor. This PluginPtr will now point at the same plugin instance as _other, and they will share ownership.

template<typename OtherPluginType >
	TemplatePluginPtr (const TemplatePluginPtr< OtherPluginType > &_other)
	Casting constructor. This PluginPtr will now point at the same plugin instance as _other, and they will share ownership. This essentially allows casting between PluginPtrs that are holding different types of plugin wrappers (for example, you can cast a generic PluginPtr to any SpecializedPluginPtr type, or you can cast between different types of specializations).

	TemplatePluginPtr (TemplatePluginPtr &&_other)
	Move constructor. This PluginPtr will take ownership of the plugin instance held by _other. If this PluginPtr was holding an instance to another plugin, that instance will be deleted if no other PluginPtr is referencing which is being moved.

	~TemplatePluginPtr ()=default
	Destructor. Deletes this PluginPtr's reference to the plugin instance. Once all PluginPtrs that refer to a plugin instance are deleted, the plugin will also be deleted.

void	Clear ()
	Clears the Plugin instance from this PluginPtr. IsEmpty() will return true after this is used, and none of the interfaces will be available any longer.

std::size_t	Hash () const
	Produces a hash for the plugin instance that this PluginPtr is holding. This function allows PluginPtr instances to be used as values in a std::unordered_set<PluginPtr> or keys in a std::unordered_map<PluginPtr, T>. Using this function directly should not normally be necessary.

bool	IsEmpty () const
	Check whether this is pointing at a valid plugin.

	operator bool () const
	Implicitly convert this PluginPtr to a boolean.

bool	operator!= (const TemplatePluginPtr &_other) const
	Comparison operator.

PluginType &	operator* () const
	Get a reference to the wrapper for the plugin instance that is being managed by this PluginPtr.

PluginType *	operator-> () const
	Access the wrapper for the plugin instance and call one of its member functions.

bool	operator< (const TemplatePluginPtr &_other) const
	Comparison operator.

bool	operator<= (const TemplatePluginPtr &_other) const
	Comparison operator.

TemplatePluginPtr &	operator= (const TemplatePluginPtr &_other)
	Copy assignment operator. This PluginPtr will now point at the same plugin instance as _other, and they will share ownership. If this PluginPtr was holding an instance to another plugin, that instance will be deleted if no other PluginPtr is referencing it.

template<typename OtherPluginType >
TemplatePluginPtr &	operator= (const TemplatePluginPtr< OtherPluginType > &_other)
	Casting operator. This PluginPtr will now point at the same plugin instance as _other, and they will share ownership. This essentially allows casting between PluginPtrs that are holding different types of plugin wrappers.

TemplatePluginPtr &	operator= (std::nullptr_t _null)
	nullptr assignment operator. Same as calling Clear()

TemplatePluginPtr &	operator= (TemplatePluginPtr &&_other)
	Move assignment operator. This PluginPtr will take ownership of the plugin instance held by _other. If this PluginPtr was holding an instance to another plugin, that instance will be deleted if no other PluginPtr is referencing it.

bool	operator== (const TemplatePluginPtr &_other) const
	Comparison operator.

bool	operator> (const TemplatePluginPtr &_other) const
	Comparison operator.

bool	operator>= (const TemplatePluginPtr &_other) const
	Comparison operator.

Detailed Description

template<typename PluginType>
class gz::plugin::TemplatePluginPtr< PluginType >

This class manages the lifecycle of a plugin instance. It can receive a plugin instance from the Loader class or by copy-construction or assignment from another PluginPtr instance.

This class behaves similarly to a std::shared_ptr where multiple PluginPtr objects can share a single plugin instance, and the plugin instance will not be deleted until all PluginPtr objects that refer to it are either destroyed, cleared, or begin referring to a different plugin instance.

A PluginPtr object can be "cast" to a SpecializedPluginPtr object by simply using the copy/move constructor or assignment operator of a SpecializedPluginPtr object. Note that this "cast" does have a small amount of overhead associated with it, but it may result in huge savings after initialization is finished if you frequently access the interfaces that the SpecializedPluginPtr is specialized for.

Public Member Functions

Detailed Description

Constructor & Destructor Documentation

◆ ~TemplatePluginPtr()

◆ TemplatePluginPtr() [1/4]

◆ TemplatePluginPtr() [2/4]

◆ TemplatePluginPtr() [3/4]

◆ TemplatePluginPtr() [4/4]

Member Function Documentation

◆ Clear()

◆ Hash()

◆ IsEmpty()

◆ operator bool()

◆ operator!=()

◆ operator*()

◆ operator->()

◆ operator<()

◆ operator<=()

◆ operator=() [1/4]

◆ operator=() [2/4]

◆ operator=() [3/4]

◆ operator=() [4/4]

◆ operator==()

◆ operator>()

◆ operator>=()