1 use std::any::{Any, TypeId}; 2 use std::mem; 3 4 use runtime::Imp; 5 6 extern { objc_msgSend()7 fn objc_msgSend(); objc_msgSend_stret()8 fn objc_msgSend_stret(); 9 objc_msgSendSuper()10 fn objc_msgSendSuper(); objc_msgSendSuper_stret()11 fn objc_msgSendSuper_stret(); 12 } 13 msg_send_fn<R: Any>() -> Imp14pub fn msg_send_fn<R: Any>() -> Imp { 15 // Double-word sized fundamental data types don't use stret, 16 // but any composite type larger than 4 bytes does. 17 // <http://infocenter.arm.com/help/topic/com.arm.doc.ihi0042e/IHI0042E_aapcs.pdf> 18 19 let type_id = TypeId::of::<R>(); 20 if mem::size_of::<R>() <= 4 || 21 type_id == TypeId::of::<i64>() || 22 type_id == TypeId::of::<u64>() || 23 type_id == TypeId::of::<f64>() { 24 objc_msgSend 25 } else { 26 objc_msgSend_stret 27 } 28 } 29 msg_send_super_fn<R: Any>() -> Imp30pub fn msg_send_super_fn<R: Any>() -> Imp { 31 let type_id = TypeId::of::<R>(); 32 if mem::size_of::<R>() <= 4 || 33 type_id == TypeId::of::<i64>() || 34 type_id == TypeId::of::<u64>() || 35 type_id == TypeId::of::<f64>() { 36 objc_msgSendSuper 37 } else { 38 objc_msgSendSuper_stret 39 } 40 } 41