Struct GlobalBlock 

pub struct GlobalBlock { /* private fields */ }

An Objective-C block with no captures.

A block is an object whose first word is an isa like any other; what makes it callable is the invoke pointer at offset 16, which is passed the block itself as its first argument. With nothing captured there is nothing to copy or release, so the block can be a plain static tagged BLOCK_IS_GLOBAL — _NSConcreteGlobalBlock is exactly the isa for that.

Implementations

impl GlobalBlock

pub unsafe fn new( invoke: *const c_void, descriptor: &'static BlockDescriptor, ) -> Self

Wrap invoke as a block. It is called with the block as its first argument, then whatever the block’s signature declares.

Safety

invoke must match the signature the receiver expects, including the leading block pointer.

Trait Implementations

impl Sync for GlobalBlock