Type Alias UnitCompletion 

pub type UnitCompletion = SyncCompletion<()>;

Unit completion - for operations that return success/error without a value

Aliased Type

pub struct UnitCompletion { /* private fields */ }

Implementations

impl UnitCompletion

pub unsafe extern "C" fn callback( context: *mut c_void, success: bool, msg: *const c_char, )

C callback for operations that return (context, success, error_msg)

This can be used directly wherever a crate::ffi_callbacks::UnitCompletionCallback is required.

The body is wrapped in catch_user_panic so that a mutex-poison panic (or any other unexpected panic) does not unwind across the extern "C" boundary, which would be undefined behaviour.

Safety

context must be the exact live pointer returned with this UnitCompletion, must be invoked exactly once, and must not be used after this call. The internal atomic flag does not protect storage that has already been freed or concurrently invalidated.

When success is false, msg must be null or point to a valid NUL-terminated C string for the duration of this call. It is ignored when success is true.