node/test/js-native-api/test_instance_data/test_instance_data.c at main · MoLow/node · GitHub

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#include <js_native_api.h>

#include <stdio.h>

#include <stdlib.h>

#include "../common.h"

#include "../entry_point.h"

typedef struct {

size_t value;

bool print;

napi_ref js_cb_ref;

} AddonData;

static napi_value Increment(napi_env env, napi_callback_info info) {

AddonData* data;

napi_value result;

NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));

NODE_API_CALL(env, napi_create_uint32(env, ++data->value, &result));

return result;

}

static void DeleteAddonData(napi_env env, void* raw_data, void* hint) {

AddonData* data = raw_data;

if (data->print) {

printf("deleting addon data\n");

}

if (data->js_cb_ref != NULL) {

NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));

}

free(data);

}

static napi_value SetPrintOnDelete(napi_env env, napi_callback_info info) {

AddonData* data;

NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));

data->print = true;

return NULL;

}

static void TestFinalizer(napi_env env, void* raw_data, void* hint) {

(void) raw_data;

(void) hint;

AddonData* data;

NODE_API_CALL_RETURN_VOID(env, napi_get_instance_data(env, (void**)&data));

napi_value js_cb, undefined;

NODE_API_CALL_RETURN_VOID(env,

napi_get_reference_value(env, data->js_cb_ref, &js_cb));

NODE_API_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined));

NODE_API_CALL_RETURN_VOID(env,

napi_call_function(env, undefined, js_cb, 0, NULL, NULL));

NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));

data->js_cb_ref = NULL;

}

static napi_value ObjectWithFinalizer(napi_env env, napi_callback_info info) {

AddonData* data;

napi_value result, js_cb;

size_t argc = 1;

NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));

NODE_API_ASSERT(env, data->js_cb_ref == NULL, "reference must be NULL");

NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, &js_cb, NULL, NULL));

NODE_API_CALL(env, napi_create_object(env, &result));

NODE_API_CALL(env,

napi_add_finalizer(env, result, NULL, TestFinalizer, NULL, NULL));

NODE_API_CALL(env, napi_create_reference(env, js_cb, 1, &data->js_cb_ref));

return result;

}

EXTERN_C_START

napi_value Init(napi_env env, napi_value exports) {

AddonData* data = malloc(sizeof(*data));

data->value = 41;

data->print = false;

data->js_cb_ref = NULL;

NODE_API_CALL(env, napi_set_instance_data(env, data, DeleteAddonData, NULL));

napi_property_descriptor props[] = {

DECLARE_NODE_API_PROPERTY("increment", Increment),

DECLARE_NODE_API_PROPERTY("setPrintOnDelete", SetPrintOnDelete),

DECLARE_NODE_API_PROPERTY("objectWithFinalizer", ObjectWithFinalizer),

};

NODE_API_CALL(env,

napi_define_properties(

env, exports, sizeof(props) / sizeof(*props), props));

return exports;

}

EXTERN_C_END

node/test/js-native-api/test_instance_data/test_instance_data.c at main · MoLow/node · GitHub

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