func Create(windowInstance unsafe.Pointer) (obj DirectInput, err error) {
DirectInput8Create, err := syscall.GetProcAddress(dll, "DirectInput8Create")
if err != nil {
return DirectInput{}, err
}
err = toError(C.create(
unsafe.Pointer(DirectInput8Create),
C.HINSTANCE(windowInstance),
&obj.handle,
))
return
}
func main() {
var p *C.PERSON
name := C.CString("Maria")
age := C.int(20)
p = C.create(name, age)
fmt.Println(C.GoString(p.name)) // Maria: char *는 C.GoString 함수로 변환하여 사용
fmt.Println(p.age) // 20
C.free(unsafe.Pointer(name)) // C.CString으로 만든 문자열은 반드시 해제
C.free(unsafe.Pointer(p)) // C 언어의 malloc 함수로 할당한 메모리는 반드시 해제
}
func create(path string, flags int) (*DB, error) {
pstr := C.CString(path)
defer C.free(unsafe.Pointer(pstr))
db, err := C.create(pstr, C.int(flags))
if db == nil {
return nil, err
}
ret := &DB{db, sync.Mutex{}}
runtime.SetFinalizer(ret, destroy)
return ret, nil
}
func main() {
var p *C.PERSON
name := C.CString("kinow")
age := C.int(33)
p = C.create(name, age)
C.show_person(p)
fmt.Println("reflect PERSON: ", reflect.TypeOf(p))
fmt.Println("reflect char* of PERSON: ", reflect.TypeOf(p.name))
fmt.Println("reflect int of PERSON: ", reflect.TypeOf(p.age))
fmt.Println(C.GoString(p.name))
fmt.Println(p.age)
C.free(unsafe.Pointer(name))
C.free(unsafe.Pointer(p))
}
func (Cv *Canvas) Create() {
//I.Lock()
Cv.Cv = C.create()
C.clear(Cv.Cv)
//I.Unlock()
}
func TestCharStarStarSlice() {
m := C.create()
names := CharStarStarSlice(m.names, 2)
fmt.Println("age:", m.age)
fmt.Println("names:", names)
}