我在C中写了一个node.js插件.我使用node :: ObjectWrap包装一些类实例,以将本机实例与
javascript对象相关联.我的问题是,包装实例的析构函数永远不会运行.
这是一个例子：
point.cc
#include <node.h>
#include <v8.h>
#include <iostream>
using namespace v8;
using namespace node;
class Point
:ObjectWrap
{
protected:
int x;
int y;
public:
Point(int x,int y) :x(x),y(y) {
std::cout << "point constructs" << std::endl;
}
~Point() {
std::cout << "point destructs" << std::endl;
}
static Handle<Value> New(const Arguments &args){
HandleScope scope;
// arg check is omitted for brevity
Point *point = new Point(args[0]->Int32Value(),args[1]->Int32Value());
point->Wrap(args.This());
return scope.Close(args.This());
}
static void Initialize(Handle<Object> target){
HandleScope scope;
Local<FunctionTemplate> t = FunctionTemplate::New(New);
t->InstanceTemplate()->SetInternalFieldCount(1);
NODE_SET_PROTOTYPE_METHOD(t,"get",Point::get);
target->Set(String::NewSymbol("Point"),t->GetFunction());
}
static Handle<Value> get(const Arguments &args){
HandleScope scope;
Point *p = ObjectWrap::Unwrap<Point>(args.This());
Local<Object> result = Object::New();
result->Set(v8::String::New("x"),v8::Integer::New(p->x));
result->Set(v8::String::New("y"),v8::Integer::New(p->y));
return scope.Close(result);
}
};
extern "C" void init(Handle<Object> target) {
HandleScope scope;
Point::Initialize(target);
};
test.js
var pointer = require('./build/default/point');
var p = new pointer.Point(1,2);
console.log(p.get());
我假设我必须设置一个WeakPointerCallback,它删除手动分配的对象,如果V8的垃圾收集器想要它.我该怎么做？
