+ { int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int int }
alien-invoke gc 3 ;
[ 861 3 ] [ 42 [ ] each ffi_test_31 ] unit-test
: ffi_test_31_point_5 ( a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a a -- result )
{ $values { "return" "a C return type" } { "parameters" "a sequence of C parameter types" } { "abi" "one of " { $snippet "\"cdecl\"" } " or " { $snippet "\"stdcall\"" } } { "quot" "a quotation" } { "alien" alien } }
{ $description
- "Defines a callback from C to Factor which accepts the given set of parameters from the C caller, pushes them on the data stack, calls the quotation, and passes a return value back to the C caller. A return type of " { $snippet "\"void\"" } " indicates that no value is to be returned."
+ "Defines a callback from C to Factor which accepts the given set of parameters from the C caller, pushes them on the data stack, calls the quotation, and passes a return value back to the C caller. A return type of " { $snippet "void" } " indicates that no value is to be returned."
$nl
"When a compiled reference to this word is called, it pushes the callback's alien address on the data stack. This address can be passed to any C function expecting a C function pointer with the correct signature. The callback is actually generated when the word calling " { $link alien-callback } " is compiled."