A function pointer {Field} in a {StructLayout}.
static VALUE function_field_get(VALUE self, VALUE pointer) { StructField* f; Data_Get_Struct(self, StructField, f); return rbffi_Function_NewInstance(f->rbType, (*rbffi_AbstractMemoryOps.pointer->get)(MEMORY(pointer), f->offset)); }
If a Proc is submitted as proc
, it is automatically
transformed to a {Function}.
static VALUE function_field_put(VALUE self, VALUE pointer, VALUE proc) { StructField* f; VALUE value = Qnil; Data_Get_Struct(self, StructField, f); if (NIL_P(proc) || rb_obj_is_kind_of(proc, rbffi_FunctionClass)) { value = proc; } else if (rb_obj_is_kind_of(proc, rb_cProc) || rb_respond_to(proc, rb_intern("call"))) { value = rbffi_Function_ForProc(f->rbType, proc); } else { rb_raise(rb_eTypeError, "wrong type (expected Proc or Function)"); } (*rbffi_AbstractMemoryOps.pointer->put)(MEMORY(pointer), f->offset, value); return self; }