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当我尝试使持久性句柄变弱时,为什么WeakReferenceCallback未被调用?请参见下面的示例:V8:为什么WeakReferenceCallback没有被调用?
void myWeakReferenceCallback(v8::Persistent<v8::Value> theValue, void *theParameter)
{
fprintf(stdout, "myWeakReferenceCallback");
}
void testWeakReferenceCallback()
{
v8::Persistent<v8::Value> persistent_value;
{
v8::Persistent<v8::Context> context = v8::Context::New();
v8::Context::Scope context_scope(context);
v8::HandleScope handle_scope;
v8::Local<v8::Value> local_value = v8::NumberObject::New(5.0);
persistent_value = v8::Persistent<v8::Value>::New(local_value);
persistent_value.MakeWeak(NULL, myWeakReferenceCallback);
context.Dispose();
}
persistent_value.Dispose();
}
谢谢,这确实起作用。我之前的印象是,在调用回调之前,我需要在Persistent句柄上调用Dispose(即释放强引用)。但现在它是有道理的。当我使它变弱时,我发布了强烈的参考,噢! – pdizzle 2013-03-13 16:38:52