Class ComponentsContainer ' a component contains other components' Inherits System.ComponentModel.Component Private foo as New Component Private bar as New Component Protected Override Sub Finalize() foo.Dispose() ' HERE ? ' bar.Dispose() MyBase.Finalize() End Sub Protected Overrides Sub Dispose(disposing As...
I am getting this fxcop warning even though my objects do not have finalizers I just have the simple IDisposable.Dispose() method in place. Is this rule really telling me I should implement finalizers? I don't have any unmanaged resources to finalize so I wouldn't have the need for the advanced Dispose(bool) pattern with suppress finali...
In other words, class Foo { object obj; Foo() { obj = new object(); } ~Foo() { obj.ToString(); /* NullReferenceException? */ } } ...
From Effective Java 2nd Edition Item 7: Avoid Finalizers "Oh, and one more thing: there is a severe performance penalty for using finalizers. On my machine, the time to create and destroy a simple object is about 5.6 ns. Adding a finalizer increases the time to 2,400 ns. In other words, it is about 430 times slower to create and destroy...
How can I handle all exceptions for a class similar to the following under certain circumstances? class Test : IDisposable { public Test() { throw new Exception("Exception in ctor"); } public void Dispose() { throw new Exception("Exception in Dispose()"); } ~Test() { this.Dispose(); } } I tried this but it do...
I have been pondering why it is recommended that we should not release managed resources inside finalize. If you see the code example at http://msdn.microsoft.com/en-us/library/system.gc.suppressfinalize.aspx , and search for string "Dispose(bool disposing) executes in two distinct scenarios" and read that comment, you will understand w...
Quote from MSDN: If Finalize or an override of Finalize throws an exception, the runtime ignores the exception, terminates that Finalize method, and continues the finalization process. Yet if I have: ~Person() { throw new Exception("meh"); } then it results in a runtime exception? p.s. I know that this should never happen, however ...
I used to be pretty sure the answer is "no", as explained in Overriding the Finalize method and Object.Finalize documentation. However, while randomly browsing through FileStream in Reflector, I found that it can actually call just such a method from a finalizer: private SafeFileHandle _handle; ~FileStream() { if (this._handle != ...
Effective Java says : There is a severe performance penalty for using finalizers. Why is it slower to destroy an object using the finalizers? ...
I have the following class which is a decorator for an IDisposable object (I have omitted the stuff it adds) which itself implements IDisposable using a common pattern: public class DisposableDecorator : IDisposable { private readonly IDisposable _innerDisposable; public DisposableDecorator(IDisposable innerDisposable) { ...
According to this post, in .Net, Finalizers are actually even worse than that. Besides that they run late (which is indeed a serious problem for many kinds of resources), they are also less powerful because they can only perform a subset of the operations allowed in a destructor (e.g., a finalizer cannot reliably use other objects, ...
I am using MySQL with the .Net connector on 64 bit Windows. For some reason Mysql is throwing a NullReferenceException in Finalize. This is the problem here and it seems that its due to a bug described here. This bug was reported in 6.22, but I am getting the issue with 6.23 too so apparently it is not fixed. I am using MySQL both with ...
What would happen if an exception is thrown during the execution of finalize()? Is the stack unwind like normally? Does it continue finalize() and ignore the exception? Does it stop finalize() and continue GC the object? Or something else? I'm not looking for guidelines of using finalize() there are plently of pages explaining that. ...
I learned that calling an Object's wait() method will release the object monitor, if present. But I have some questions regarding calling notify() on this object by another thread: (when) will the waiting thread wake up, if another (a 3rd) thread owns the object monitor in the meanwhile? will the waiting thread wake up, if a 3rd threa...
We're running a small JRuby on Rails app under Tomcat 6.0.28 with a Spring-based backend. I've spent some time with the Eclipse Memory Analysis tool and I can definitely tell that instances of the JRubyClassLoader are leaking. I setup our webapp to only use a single JRuby runtime and then I effectively did a hot-deploy to Tomcat by touch...
I am well aware that finalizers are typically used to control unmanaged resources. Under what circumstances may a finalizer deal with managed ones? My understanding is that presence in the finalizer queue will prevent any object, or objects strongly referenced thereby, from being collected, but it will not (of course) protect them from...
Using Adobe Flex 3, is there any way to specify a finaliser? ...
I have been reading these slides about Java finalizers. In it, the author describes a scenario (on slide 33) whereby CleanResource.finalize() could be run by the finalizer thread while CleanResource.doSomething() is still running on another thread. How could this happen? If doSomething() is a non-static method, then to execute that me...
I was reading "Effective Java programming by Joshua Bloch. I this book he advices not to use the "finalize" block as its not guaranteed to be executed. Can anyone explain a bit more on this or give a link of some article which explains this in detail? ...
Are finalizers guaranteed to be executed in .NET at some point (spare power outages and the like)? I know how GC works and that it is nondeterministic when exactly they'll run. (The search did not display good answers, so I'm adding this question in high expectation of a merge with the not-so-easy-to-discover actual answers. Apart from ...