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#include "../common.h"
#include "../entry_point.h"
#include "assert.h"
#include "myobject.h"
typedef int32_t FinalizerData;
napi_ref MyObject::constructor;
MyObject::MyObject(double value)
: value_(value), env_(nullptr), wrapper_(nullptr) {}
MyObject::~MyObject() { napi_delete_reference(env_, wrapper_); }
void MyObject::Destructor(node_api_basic_env env,
void* nativeObject,
void* /*finalize_hint*/) {
MyObject* obj = static_cast<MyObject*>(nativeObject);
delete obj;
FinalizerData* data;
NODE_API_BASIC_CALL_RETURN_VOID(
env, napi_get_instance_data(env, reinterpret_cast<void**>(&data)));
*data += 1;
}
void MyObject::Init(napi_env env, napi_value exports) {
napi_property_descriptor properties[] = {
{ "value", nullptr, nullptr, GetValue, SetValue, 0, napi_default, 0 },
{ "valueReadonly", nullptr, nullptr, GetValue, nullptr, 0, napi_default,
0 },
DECLARE_NODE_API_PROPERTY("plusOne", PlusOne),
DECLARE_NODE_API_PROPERTY("multiply", Multiply),
};
napi_value cons;
NODE_API_CALL_RETURN_VOID(env, napi_define_class(
env, "MyObject", -1, New, nullptr,
sizeof(properties) / sizeof(napi_property_descriptor),
properties, &cons));
NODE_API_CALL_RETURN_VOID(env,
napi_create_reference(env, cons, 1, &constructor));
NODE_API_CALL_RETURN_VOID(env,
napi_set_named_property(env, exports, "MyObject", cons));
}
napi_value MyObject::New(napi_env env, napi_callback_info info) {
napi_value new_target;
NODE_API_CALL(env, napi_get_new_target(env, info, &new_target));
bool is_constructor = (new_target != nullptr);
size_t argc = 1;
napi_value args[1];
napi_value _this;
NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
if (is_constructor) {
// Invoked as constructor: `new MyObject(...)`
double value = 0;
napi_valuetype valuetype;
NODE_API_CALL(env, napi_typeof(env, args[0], &valuetype));
if (valuetype != napi_undefined) {
NODE_API_CALL(env, napi_get_value_double(env, args[0], &value));
}
MyObject* obj = new MyObject(value);
obj->env_ = env;
NODE_API_CALL(env,
napi_wrap(env, _this, obj, MyObject::Destructor,
nullptr /* finalize_hint */, &obj->wrapper_));
return _this;
}
// Invoked as plain function `MyObject(...)`, turn into construct call.
argc = 1;
napi_value argv[1] = {args[0]};
napi_value cons;
NODE_API_CALL(env, napi_get_reference_value(env, constructor, &cons));
napi_value instance;
NODE_API_CALL(env, napi_new_instance(env, cons, argc, argv, &instance));
return instance;
}
napi_value MyObject::GetValue(napi_env env, napi_callback_info info) {
napi_value _this;
NODE_API_CALL(env,
napi_get_cb_info(env, info, nullptr, nullptr, &_this, nullptr));
MyObject* obj;
NODE_API_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
napi_value num;
NODE_API_CALL(env, napi_create_double(env, obj->value_, &num));
return num;
}
napi_value MyObject::SetValue(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
napi_value _this;
NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
MyObject* obj;
NODE_API_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
NODE_API_CALL(env, napi_get_value_double(env, args[0], &obj->value_));
return nullptr;
}
napi_value MyObject::PlusOne(napi_env env, napi_callback_info info) {
napi_value _this;
NODE_API_CALL(env,
napi_get_cb_info(env, info, nullptr, nullptr, &_this, nullptr));
MyObject* obj;
NODE_API_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
obj->value_ += 1;
napi_value num;
NODE_API_CALL(env, napi_create_double(env, obj->value_, &num));
return num;
}
napi_value MyObject::Multiply(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
napi_value _this;
NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, args, &_this, nullptr));
double multiple = 1;
if (argc >= 1) {
NODE_API_CALL(env, napi_get_value_double(env, args[0], &multiple));
}
MyObject* obj;
NODE_API_CALL(env, napi_unwrap(env, _this, reinterpret_cast<void**>(&obj)));
napi_value cons;
NODE_API_CALL(env, napi_get_reference_value(env, constructor, &cons));
const int kArgCount = 1;
napi_value argv[kArgCount];
NODE_API_CALL(env, napi_create_double(env, obj->value_ * multiple, argv));
napi_value instance;
NODE_API_CALL(env, napi_new_instance(env, cons, kArgCount, argv, &instance));
return instance;
}
// This finalizer should never be invoked.
void ObjectWrapDanglingReferenceFinalizer(node_api_basic_env env,
void* finalize_data,
void* finalize_hint) {
assert(0 && "unreachable");
}
napi_ref dangling_ref;
napi_value ObjectWrapDanglingReference(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value args[1];
NODE_API_CALL(env,
napi_get_cb_info(env, info, &argc, args, nullptr, nullptr));
// Create a napi_wrap and remove it immediately, whilst leaving the out-param
// ref dangling (not deleted).
NODE_API_CALL(env,
napi_wrap(env,
args[0],
nullptr,
ObjectWrapDanglingReferenceFinalizer,
nullptr,
&dangling_ref));
NODE_API_CALL(env, napi_remove_wrap(env, args[0], nullptr));
return args[0];
}
napi_value ObjectWrapDanglingReferenceTest(napi_env env,
napi_callback_info info) {
napi_value out;
napi_value ret;
NODE_API_CALL(env, napi_get_reference_value(env, dangling_ref, &out));
if (out == nullptr) {
// If the napi_ref has been invalidated, delete it.
NODE_API_CALL(env, napi_delete_reference(env, dangling_ref));
NODE_API_CALL(env, napi_get_boolean(env, true, &ret));
} else {
// The dangling napi_ref is still valid.
NODE_API_CALL(env, napi_get_boolean(env, false, &ret));
}
return ret;
}
static napi_value GetFinalizerCallCount(napi_env env, napi_callback_info info) {
size_t argc = 1;
napi_value argv[1];
FinalizerData* data;
napi_value result;
NODE_API_CALL(env,
napi_get_cb_info(env, info, &argc, argv, nullptr, nullptr));
NODE_API_CALL(env,
napi_get_instance_data(env, reinterpret_cast<void**>(&data)));
NODE_API_CALL(env, napi_create_int32(env, *data, &result));
return result;
}
static void finalizeData(napi_env env, void* data, void* hint) {
delete reinterpret_cast<FinalizerData*>(data);
}
EXTERN_C_START
napi_value Init(napi_env env, napi_value exports) {
FinalizerData* data = new FinalizerData;
*data = 0;
NODE_API_CALL(env, napi_set_instance_data(env, data, finalizeData, nullptr));
MyObject::Init(env, exports);
napi_property_descriptor descriptors[] = {
DECLARE_NODE_API_PROPERTY("objectWrapDanglingReference",
ObjectWrapDanglingReference),
DECLARE_NODE_API_PROPERTY("objectWrapDanglingReferenceTest",
ObjectWrapDanglingReferenceTest),
DECLARE_NODE_API_PROPERTY("getFinalizerCallCount", GetFinalizerCallCount),
};
NODE_API_CALL(
env,
napi_define_properties(env,
exports,
sizeof(descriptors) / sizeof(*descriptors),
descriptors));
return exports;
}
EXTERN_C_END
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