c# - Locking hierarchy of objects in .NET -

-

I have a class that represents "the state of the world" There are many collections of many other objects in the class Which in turn is in reference to the collection of more objects and objects, sometimes in reference to their ancestors in the "world hierarchy". To simplify what is being said, here is an example (has been changed to XML, details details):

Two threads, UI threads and background threads (which is actually a server).

The server receives the message "Junk" (adding cities, blocks, etc.).

UI thread drages the world's state in a while using the picture box object. The reference layer only refers to the IWorld object (which applies to the world), and there is no way to access the elements inside it.

UI threads should lock the world's Full position so that the world can not be changed during the drawing (which creates a picture of an incompatible world). Since its only reference to the IWorld object, this is the only thing to be locked.

My question is whether this lock will be sufficient (that is, lock all the fields and this object is locked in an inconsistent state), or each object should be locked separately. What is the correct view of this problem?

Note: UI has no way to contact the server (which means it can not tell the server to stop changing the world, and then tell it < / P>

Edit : If all the classes in the world and Hiraach implement the ILOK interface which provides the lock () method which calls the lock () at all low levels ( Again), it may possibly be deadlock (cyclical reference) or simply flowing

I think the design change is in order.

You do not need to lock the recursive - if both threads lock on the same IWorld context, then be sufficient to reassure mutual specification.

Locking on different elements will definitely give you better locking, but then you can end up with an incompatible figure - I call

However, a better model usually publishes "snapshots" to the server and then a new copy of the world. To create and modify the copy, when appropriate, by changing the snapshot you do not need this exclusional exclusion which can block your UI when the server is changing it, while the Turning it up is changing.


Comments

Post a Comment

Popular posts from this blog

asp.net - Javascript/DOM Why is does my form not support submit()? -

-
This is my first time working with asp.net and javascript, so I do not know very good web resources, or Much about javascript debugging I have to find out that on line oFormObject.submit (); Microsoft JScript Runtime Error: Object does not support this property or method I am using the link to work as a button because I am terrible in aesthetics and I think That link will look more professional than a table of 50 buttons. I have read that this solution can cause problems with browsers due to pre-rendering of my links and many additional traffic and problems, but CSS gives me a button like a link, which has issues of alignment and difference seemed to. & lt ;! DOCTYPE HTML PUBLIC "- // W3C // DTD HTML 4.01 // N" "http://www.w3.org/TR/html4/strict.dtd"> & Lt; Html xmlns = "http://www.w3.org/1999/xhtml" & gt; & Lt; Head & gt; & Lt; Link rel = "stylesheet" type = "text / css" href = "defect differen
Read more

sockets - Delphi: TTcpServer, connection reset when reading -

-
I am trying to implement one for Delphi, but there are some problems with communication. Fitnesse will start my process, and give me a portmember as a command line argument. Then I should make a socket on the port number given to me, and fitness will connect to that port I am using a TCPCP server for the job: < Pre> TcpServer1.LocalPort: = ParamStr (ParamCount); TcpServer1 Active: = true; On OnEXEPT () -Event, I send the protocol version to use as specified in the protocol. Process TForm1.TcpServer1Accept (From: TOBject; ClientSocket: TCustomIpClient); Var s: ansistring; Start clientSocket. Syndrome ('slim - v 0.0', # 10); SetLength (S, 6); ClientSketts Receavebook (S, 6); End; When I call ReceiveBuf (), the process ends, and fitness throws an exception: java.net.SocketException: connection Reset I have seen what sent and received. It shows that my code sends the protocol version, fitness sends back a message, and when I try to get this message
Read more

javascript - Classic ASP "ExecuteGlobal" statement acting differently on two servers -

-
I have a strange problem that I really do not know. In addition to developing a new ASP.NET site, I have to support the old "classic ASP" site. It is written in VBScript with a batch of JavaScript functions. Many of the JavaScript functions include 'files' Everything is fine on our production system (which security is controlled by another group - this is a military installation) Debugging them once did not work I). However, I have a fix for a vague bug that needs to be fully tested and some functions do not run under the "local" copy of the website that runs on my PC. For the record, I am running IIS 5.1 on XP. The problem is that some Javascript functions are running "OK" on the production server, but when they use it as a server, they are not defined on my PC what is happening that last Programmer, for some reason, has decided to put some functions in a series of files, which according to the observations, imitate the "need_once
Read more