Struct DiplomatCallback 

#[repr(C)]
pub struct DiplomatCallback<ReturnType> {
    pub data: *mut c_void,
    pub run_callback: unsafe extern "C" fn(*mut c_void, ...) -> ReturnType,
    pub destructor: Option<unsafe extern "C" fn(*mut c_void)>,
}

Struct representing a callback from Rust into a foreign language

This is largely used internally by the Diplomat macro, and should not need to be constructed manually outside of that context

Fields

data: *mut c_void

Any data required to run the callback; e.g. a pointer to the callback wrapper object in the foreign runtime + the runtime itself

run_callback: unsafe extern "C" fn(*mut c_void, ...) -> ReturnType

Function to actually run the callback. Note the first param is mutable, but depending on if this is passed to a Fn or FnMut may not actually need to be. FFI-Callers of said functions should cast to mutable.

Takes in self.data and any number of additional arguments.

destructor: Option<unsafe extern "C" fn(*mut c_void)>

Function to destroy this callback struct.

Takes in self.data

Trait Implementations

impl<ReturnType> Drop for DiplomatCallback<ReturnType>

fn drop(&mut self)

Executes the destructor for this type.

fn pin_drop(self: Pin<&mut Self>)

🔬This is a nightly-only experimental API. (pin_ergonomics)

Execute the destructor for this type, but different to Drop::drop, it requires self to be pinned.