func Call(cif CIF, fn uintptr, rval uintptr, args ...uintptr) {
C.ffi_call(
(*C.ffi_cif)(&cif),
(*[0]byte)(unsafe.Pointer(fn)),
unsafe.Pointer(rval),
(*unsafe.Pointer)(unsafe.Pointer(&args[0])),
)
}
func (cif Interface) Call(fptr unsafe.Pointer, ret unsafe.Pointer, args ...unsafe.Pointer) (err error) {
var va *unsafe.Pointer
if len(args) != 0 {
va = &args[0]
}
_, err = C.ffi_call(&cif.ffi_cif, C.function(fptr), ret, va)
return
}
func (call *Callable) Call() {
C.ffi_call(call.cif, ffi_func(call.fun.ptr), nil, nil)
}
// Call invokes the cif with the provided function pointer and arguments
func (cif *Cif) Call(fct FctPtr, args ...interface{}) (reflect.Value, error) {
nargs := len(args)
if nargs != int(cif.c.nargs) {
return reflect.New(reflect.TypeOf(0)), fmt.Errorf("ffi: invalid number of arguments. expected '%d', got '%s'.",
int(cif.c.nargs), nargs)
}
var c_args *unsafe.Pointer = nil
if nargs > 0 {
cargs := make([]unsafe.Pointer, nargs)
for i, _ := range args {
var carg unsafe.Pointer
//fmt.Printf("[%d]: (%v)\n", i, args[i])
t := reflect.TypeOf(args[i])
rv := reflect.ValueOf(args[i])
switch t.Kind() {
case reflect.String:
cstr := C.CString(args[i].(string))
defer C.free(unsafe.Pointer(cstr))
carg = unsafe.Pointer(&cstr)
case reflect.Ptr:
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Float32:
vv := args[i].(float32)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Float64:
vv := args[i].(float64)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Int:
vv := args[i].(int)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Int8:
vv := args[i].(int8)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Int16:
vv := args[i].(int16)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Int32:
vv := args[i].(int32)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Int64:
vv := args[i].(int64)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Uint:
vv := args[i].(uint)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Uint8:
vv := args[i].(uint8)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Uint16:
vv := args[i].(uint16)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Uint32:
vv := args[i].(uint32)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
case reflect.Uint64:
vv := args[i].(uint64)
rv = reflect.ValueOf(&vv)
carg = unsafe.Pointer(rv.Elem().UnsafeAddr())
}
cargs[i] = carg
}
c_args = &cargs[0]
}
out := reflect.New(rtype_from_ffi(cif.rtype.cptr()))
var c_out unsafe.Pointer = unsafe.Pointer(out.Elem().UnsafeAddr())
//println("...ffi_call...")
C.ffi_call(&cif.c, fct.c, c_out, c_args)
//fmt.Printf("...ffi_call...[done] [%v]\n",out.Elem())
return out.Elem(), nil
}
