Trait com_scrape_types::Unknown

pub trait Unknown {
    // Required methods
    unsafe fn query_interface(
        this: *mut Self,
        iid: &Guid
    ) -> Option<*mut c_void>;
    unsafe fn add_ref(this: *mut Self) -> usize;
    unsafe fn release(this: *mut Self) -> usize;
}

Implemented by interfaces that derive from the IUnknown interface (or an equivalent thereof).

Represents the base interface that all COM objects must implement and from which all COM interfaces must derive. Corresponds to the IUnknown interface. Includes functionality for reference counting (add_ref and release and for dynamically casting between interface types (query_interface).

All interface types generated by com-scrape will implement this trait.

Required Methods

unsafe fn query_interface(this: *mut Self, iid: &Guid) -> Option<*mut c_void>

Checks if an object implements the interface corresponding to the given GUID, and if so, returns a corresponding interface pointer for the object and increments the object’s reference count.

unsafe fn add_ref(this: *mut Self) -> usize

Increments an object’s reference count and returns the resulting count.

unsafe fn release(this: *mut Self) -> usize

Decrements an object’s reference count and returns the resulting count.

Object Safety

This trait is not object safe.

Implementors