Vendor things

third-party/vendor/objc/src/message/apple/x86_64.rs

@@ -0,0 +1,32 @@
+use std::mem;
+
+use runtime::Imp;
+
+extern {
+    fn objc_msgSend();
+    fn objc_msgSend_stret();
+
+    fn objc_msgSendSuper();
+    fn objc_msgSendSuper_stret();
+}
+
+pub fn msg_send_fn<R>() -> Imp {
+    // If the size of an object is larger than two eightbytes, it has class MEMORY.
+    // If the type has class MEMORY, then the caller provides space for the return
+    // value and passes the address of this storage.
+    // <http://people.freebsd.org/~obrien/amd64-elf-abi.pdf>
+
+    if mem::size_of::<R>() <= 16 {
+        objc_msgSend
+    } else {
+        objc_msgSend_stret
+    }
+}
+
+pub fn msg_send_super_fn<R>() -> Imp {
+    if mem::size_of::<R>() <= 16 {
+        objc_msgSendSuper
+    } else {
+        objc_msgSendSuper_stret
+    }
+}