1 #include <js_native_api.h>
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include "../common.h"
5 #include "../entry_point.h"
6
7 typedef struct {
8 size_t value;
9 bool print;
10 napi_ref js_cb_ref;
11 } AddonData;
12
Increment(napi_env env, napi_callback_info info)13 static napi_value Increment(napi_env env, napi_callback_info info) {
14 AddonData* data;
15 napi_value result;
16
17 NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));
18 NODE_API_CALL(env, napi_create_uint32(env, ++data->value, &result));
19
20 return result;
21 }
22
DeleteAddonData(napi_env env, void* raw_data, void* hint)23 static void DeleteAddonData(napi_env env, void* raw_data, void* hint) {
24 AddonData* data = raw_data;
25 if (data->print) {
26 printf("deleting addon data\n");
27 }
28 if (data->js_cb_ref != NULL) {
29 NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));
30 }
31 free(data);
32 }
33
SetPrintOnDelete(napi_env env, napi_callback_info info)34 static napi_value SetPrintOnDelete(napi_env env, napi_callback_info info) {
35 AddonData* data;
36
37 NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));
38 data->print = true;
39
40 return NULL;
41 }
42
TestFinalizer(napi_env env, void* raw_data, void* hint)43 static void TestFinalizer(napi_env env, void* raw_data, void* hint) {
44 (void) raw_data;
45 (void) hint;
46
47 AddonData* data;
48 NODE_API_CALL_RETURN_VOID(env, napi_get_instance_data(env, (void**)&data));
49 napi_value js_cb, undefined;
50 NODE_API_CALL_RETURN_VOID(env,
51 napi_get_reference_value(env, data->js_cb_ref, &js_cb));
52 NODE_API_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined));
53 NODE_API_CALL_RETURN_VOID(env,
54 napi_call_function(env, undefined, js_cb, 0, NULL, NULL));
55 NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));
56 data->js_cb_ref = NULL;
57 }
58
ObjectWithFinalizer(napi_env env, napi_callback_info info)59 static napi_value ObjectWithFinalizer(napi_env env, napi_callback_info info) {
60 AddonData* data;
61 napi_value result, js_cb;
62 size_t argc = 1;
63
64 NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));
65 NODE_API_ASSERT(env, data->js_cb_ref == NULL, "reference must be NULL");
66 NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, &js_cb, NULL, NULL));
67 NODE_API_CALL(env, napi_create_object(env, &result));
68 NODE_API_CALL(env,
69 napi_add_finalizer(env, result, NULL, TestFinalizer, NULL, NULL));
70 NODE_API_CALL(env, napi_create_reference(env, js_cb, 1, &data->js_cb_ref));
71
72 return result;
73 }
74
75 EXTERN_C_START
Init(napi_env env, napi_value exports)76 napi_value Init(napi_env env, napi_value exports) {
77 AddonData* data = malloc(sizeof(*data));
78 data->value = 41;
79 data->print = false;
80 data->js_cb_ref = NULL;
81
82 NODE_API_CALL(env, napi_set_instance_data(env, data, DeleteAddonData, NULL));
83
84 napi_property_descriptor props[] = {
85 DECLARE_NODE_API_PROPERTY("increment", Increment),
86 DECLARE_NODE_API_PROPERTY("setPrintOnDelete", SetPrintOnDelete),
87 DECLARE_NODE_API_PROPERTY("objectWithFinalizer", ObjectWithFinalizer),
88 };
89
90 NODE_API_CALL(env,
91 napi_define_properties(
92 env, exports, sizeof(props) / sizeof(*props), props));
93
94 return exports;
95 }
96 EXTERN_C_END
97