Extract common tail of invoke_* into ffi_invoke
Extract common tail of invoke_* into ffi_invoke

majioa/ffi,tduehr/ffi,majioa/ffi,yghannam/ffi,MikaelSmith/ffi,tduehr/ffi,ferventcoder/ffi,tduehr/ffi,yghannam/ffi,sparkchaser/ffi,ferventcoder/ffi,yghannam/ffi,ferventcoder/ffi,mvz/ffi,mvz/ffi,sparkchaser/ffi,majioa/ffi,yghannam/ffi,ffi/ffi,MikaelSmith/ffi,MikaelSmith/ffi,MikaelSmith/ffi,mvz/ffi,majioa/ffi,ferventcoder/ffi,ffi/ffi,sparkchaser/ffi,yghannam/ffi,sparkchaser/ffi,ffi/ffi,mvz/ffi,tduehr/ffi