1 #include <stdlib.h>
2 #include <js_native_api.h>
3 #include "../common.h"
4
5 static size_t g_call_count = 0;
6
Destructor(napi_env env,void * data,void * nothing)7 static void Destructor(napi_env env, void* data, void* nothing) {
8 napi_ref* ref = data;
9 NAPI_CALL_RETURN_VOID(env, napi_delete_reference(env, *ref));
10 free(ref);
11 }
12
NoDeleteDestructor(napi_env env,void * data,void * hint)13 static void NoDeleteDestructor(napi_env env, void* data, void* hint) {
14 napi_ref* ref = data;
15 size_t* call_count = hint;
16
17 // This destructor must be called exactly once.
18 if ((*call_count) > 0) abort();
19 *call_count = ((*call_count) + 1);
20 free(ref);
21 }
22
New(napi_env env,napi_callback_info info)23 static napi_value New(napi_env env, napi_callback_info info) {
24 size_t argc = 1;
25 napi_value js_this, js_delete;
26 bool delete;
27 napi_ref* ref = malloc(sizeof(*ref));
28
29 NAPI_CALL(env,
30 napi_get_cb_info(env, info, &argc, &js_delete, &js_this, NULL));
31 NAPI_CALL(env, napi_get_value_bool(env, js_delete, &delete));
32
33 if (delete) {
34 NAPI_CALL(env,
35 napi_wrap(env, js_this, ref, Destructor, NULL, ref));
36 } else {
37 NAPI_CALL(env,
38 napi_wrap(env, js_this, ref, NoDeleteDestructor, &g_call_count, ref));
39 }
40 NAPI_CALL(env, napi_reference_ref(env, *ref, NULL));
41
42 return js_this;
43 }
44
45 EXTERN_C_START
Init(napi_env env,napi_value exports)46 napi_value Init(napi_env env, napi_value exports) {
47 napi_value myobj_ctor;
48 NAPI_CALL(env,
49 napi_define_class(
50 env, "MyObject", NAPI_AUTO_LENGTH, New, NULL, 0, NULL, &myobj_ctor));
51 NAPI_CALL(env,
52 napi_set_named_property(env, exports, "MyObject", myobj_ctor));
53 return exports;
54 }
55 EXTERN_C_END
56