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5030e81ce3
Adds `napi_set_instance_data()` and `napi_get_instance_data()`, which allow native addons to store their data on and retrieve their data from `napi_env`. `napi_set_instance_data()` accepts a finalizer which is called when the `node::Environment()` is destroyed. This entails rendering the `napi_env` local to each add-on. Fixes: https://github.com/nodejs/abi-stable-node/issues/378 PR-URL: https://github.com/nodejs/node/pull/28682 Reviewed-By: Ben Noordhuis <info@bnoordhuis.nl> Reviewed-By: Michael Dawson <michael_dawson@ca.ibm.com>
98 lines
2.8 KiB
C
98 lines
2.8 KiB
C
#include <stdio.h>
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#include <stdlib.h>
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#define NAPI_EXPERIMENTAL
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#include <js_native_api.h>
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#include "../common.h"
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typedef struct {
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size_t value;
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bool print;
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napi_ref js_cb_ref;
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} AddonData;
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static napi_value Increment(napi_env env, napi_callback_info info) {
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AddonData* data;
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napi_value result;
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NAPI_CALL(env, napi_get_instance_data(env, (void**)&data));
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NAPI_CALL(env, napi_create_uint32(env, ++data->value, &result));
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return result;
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}
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static void DeleteAddonData(napi_env env, void* raw_data, void* hint) {
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AddonData* data = raw_data;
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if (data->print) {
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printf("deleting addon data\n");
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}
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if (data->js_cb_ref != NULL) {
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NAPI_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));
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}
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free(data);
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}
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static napi_value SetPrintOnDelete(napi_env env, napi_callback_info info) {
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AddonData* data;
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NAPI_CALL(env, napi_get_instance_data(env, (void**)&data));
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data->print = true;
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return NULL;
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}
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static void TestFinalizer(napi_env env, void* raw_data, void* hint) {
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(void) raw_data;
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(void) hint;
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AddonData* data;
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NAPI_CALL_RETURN_VOID(env, napi_get_instance_data(env, (void**)&data));
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napi_value js_cb, undefined;
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NAPI_CALL_RETURN_VOID(env,
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napi_get_reference_value(env, data->js_cb_ref, &js_cb));
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NAPI_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined));
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NAPI_CALL_RETURN_VOID(env,
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napi_call_function(env, undefined, js_cb, 0, NULL, NULL));
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NAPI_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));
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data->js_cb_ref = NULL;
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}
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static napi_value ObjectWithFinalizer(napi_env env, napi_callback_info info) {
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AddonData* data;
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napi_value result, js_cb;
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size_t argc = 1;
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NAPI_CALL(env, napi_get_instance_data(env, (void**)&data));
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NAPI_ASSERT(env, data->js_cb_ref == NULL, "reference must be NULL");
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NAPI_CALL(env, napi_get_cb_info(env, info, &argc, &js_cb, NULL, NULL));
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NAPI_CALL(env, napi_create_object(env, &result));
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NAPI_CALL(env,
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napi_add_finalizer(env, result, NULL, TestFinalizer, NULL, NULL));
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NAPI_CALL(env, napi_create_reference(env, js_cb, 1, &data->js_cb_ref));
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return result;
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}
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EXTERN_C_START
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napi_value Init(napi_env env, napi_value exports) {
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AddonData* data = malloc(sizeof(*data));
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data->value = 41;
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data->print = false;
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data->js_cb_ref = NULL;
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NAPI_CALL(env, napi_set_instance_data(env, data, DeleteAddonData, NULL));
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napi_property_descriptor props[] = {
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DECLARE_NAPI_PROPERTY("increment", Increment),
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DECLARE_NAPI_PROPERTY("setPrintOnDelete", SetPrintOnDelete),
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DECLARE_NAPI_PROPERTY("objectWithFinalizer", ObjectWithFinalizer),
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};
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NAPI_CALL(env, napi_define_properties(env,
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exports,
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sizeof(props) / sizeof(*props),
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props));
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return exports;
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}
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EXTERN_C_END
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