Struct com_scrape_types::ComRef

pub struct ComRef<'a, I: Interface> { /* private fields */ }

A non-owning smart pointer to a COM object.

A ComRef<'a, I> represents a borrowed reference to a COM object implementing interface I. Like ComPtr, ComRef can be used to call interface methods on the referenced object. Unlike ComPtr, ComRef does not manage the object’s reference count, i.e. it will not call the release method of the object it points to when going out of scope. See the crate-level documentation for more information.

A ComRef can be created safely from a ComPtr via ComPtr::as_com_ref, or from a ComWrapper via ComWrapper::as_com_ref. It can also be created unsafely via ComRef::from_raw.

Implementations

impl<'a, I: Interface> ComRef<'a, I>

pub fn as_ptr(&self) -> *mut I

Gets the wrapped interface pointer.

Does not perform any reference counting operations.

pub unsafe fn from_raw(ptr: *mut I) -> Option<ComRef<'a, I>>

Creates a ComRef from a raw interface pointer if the pointer is non-null.

Does not perform any reference counting operations.

from_raw will check if ptr is null (and return None if so), but this method is still unsafe, as the caller must still ensure that ptr is a valid interface pointer (see below) if it is non-null.

Safety

If ptr is non-null, it must be a valid pointer to a value of type I, and if *ptr is reinterpreted as *const I::Vtbl (see the safety documentation for Interface), it must in turn be a valid pointer to I::Vtbl.

pub unsafe fn from_raw_unchecked(ptr: *mut I) -> ComRef<'a, I>

Creates a ComRef from a raw interface pointer.

Does not perform any reference counting operations.

Safety

ptr must be a valid pointer to a value of type I, and if *ptr is reinterpreted as *const I::Vtbl (see the safety documentation for Interface), it must in turn be a valid pointer to I::Vtbl.

pub fn to_com_ptr(&self) -> ComPtr<I>

Upgrades the ComRef to a ComPtr.

Increments the reference count of the object that the ComRef points to.

pub fn upcast<J: Interface>(self) -> ComRef<'a, J>

where I: Inherits<J>,

Casts the ComRef from a derived interface to a base interface.

Does not perform any reference counting operations.

pub fn cast<J: Interface>(&self) -> Option<ComPtr<J>>

Attempts to cast from one interface to another, returning a ComPtr if successful.

If the cast is successful, increments the reference count of the object that the ComRef points to.

Trait Implementations

impl<'a, I: Interface> Clone for ComRef<'a, I>

fn clone(&self) -> ComRef<'a, I>

Returns a copy of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl<'a, I: Interface> SmartPtr for ComRef<'a, I>

type Target = I

The interface type pointed to by this smart pointer.

fn ptr(&self) -> *mut I

Gets the raw pointer held by this smart pointer.

impl<'a, I: Interface> Copy for ComRef<'a, I>

impl<'a, I> Send for ComRef<'a, I>

where I: Sync + Send + Interface,

impl<'a, I> Sync for ComRef<'a, I>

where I: Sync + Send + Interface,