Struct block_sys::Block_byref_header

#[repr(C)]
pub struct Block_byref_header {
    pub isa: *mut c_void,
    pub forwarding: *mut Block_byref_header,
    pub flags: block_flags,
    pub size: i32,
}

Structure used for on-stack variables that are referenced by blocks.

Fields

isa: *mut c_void

Class pointer. Currently unused on GNUStep and always NULL. Could be used in the future to support introspection.

forwarding: *mut Block_byref_header

The pointer to the structure that contains the real version of the data. All accesses go via this pointer. If an on-stack byref structure is copied to the heap, then its forwarding pointer should point to the heap version. Otherwise it should point to itself.

flags: block_flags

Flags and reference count.

TODO: Volatile!

size: i32

Size of this structure.