Difference between Locks, Mutex and Critical Sections

Posted by viswanathan on Stack Overflow See other posts from Stack Overflow or by viswanathan
Published on 2010-05-11T06:55:12Z Indexed on 2010/05/11 7:04 UTC
Read the original article Hit count: 156

Filed under:

multithreading

|

thread-safety

|

c++

There is an existing question regarding difference between Mutex and Critical section but it does not deal with Locks also.

So i want to know whether Critical sections can be used for thread synchronisation between processes.

Also what is meant by signalled states and non-signalled states

© Stack Overflow or respective owner

Related posts about multithreading

C++ Multithreading on Unix

as seen on Programmers - Search for 'Programmers'
I have two related questions: 1) Are there any good books for multithreading in C++, especially now that C++11 contains multithreading in the standard library? 2) I have the Wrox Programming on Unix book (1000 pages fat red one) and within it, it uses the Unix Thread class. How does this code relate… >>> More
what are the difficulties of operating system multithreading?

as seen on Stack Overflow - Search for 'Stack Overflow'
I am reading a book that compares two ways of implementing threads, Middleware Threads and OS Threads. I have a question about these sentences: "A difficulty of operating system multithreading, however, is performance overhead. Since it is the operating system that is involved in switching threads… >>> More
TCP multicast and multithreading

as seen on Stack Overflow - Search for 'Stack Overflow'
I need to come up with clients that can multicast to other clients reliably. That implies I'll be using TCP to connect reliably between clients within a multicast group. Doesn't that come up to n^2 number of connections? That seems a little silly to me. Wouldn't/shouldn't there be a way to more easily… >>> More
Multithreading recommendation based on program description

as seen on Stack Overflow - Search for 'Stack Overflow'
I would like to describe some specifics of my program and get feedback on what the best multithreading model to use would be most applicable. I've spent a lot of time now reading on ThreadPool, Threads, Producer/Consumer, etc. and have yet to come to solid conclusions. I have a list of files (all… >>> More
How to achieve multithreading using JavaScript with IE6?

as seen on Stack Overflow - Search for 'Stack Overflow'
How to achieve multithreading using JavaScript with IE6? Is there a third party library to do this? >>> More

Related posts about thread-safety

Singletons, thread safety and structuremap

as seen on Stack Overflow - Search for 'Stack Overflow'
Hi, Currently I have the following class: public class PluginManager { private static bool s_initialized; private static object s_lock = new object(); public static void Initialize() { if (!s_initialized) { lock (s_lock) { if (!s_initialized)… >>> More
.net thread safety

as seen on Stack Overflow - Search for 'Stack Overflow'
Why is locking a type considered very bad? For example, lock(typeof(DateTime)) I understand that static methods of any class in .net is considered thread safe, and that instance members are not. So it isn't necessary to lock DateTime while you are using it. The book I am reading doesn't explain why… >>> More
C++ thread safety - exchange data between worker and controller

as seen on Stack Overflow - Search for 'Stack Overflow'
I still feel a bit unsafe about the topic and hope you folks can help me - For passing data (configuration or results) between a worker thread polling something and a controlling thread interested in the most recent data, I've ended up using more or less the following pattern repeatedly: Mutex… >>> More
"Unable to initialize module" warning after update PHP on CentOS 5.4

as seen on Server Fault - Search for 'Server Fault'
After upgrading PHP from 5.1x to 5.2.10, there are a lot of warning when php -v: [root@localhost ~]# php -v PHP Warning: PHP Startup: fileinfo: Unable to initialize module Module compiled with module API=20050922, debug=0, thread-safety=0 PHP compiled with module API=20060613, debug=0, thread-safety=0 These… >>> More
How to get PHP command line to work with PDO?

as seen on Stack Overflow - Search for 'Stack Overflow'
I want to work with PDO, through PHP command line. It works perfect through the PHP web API, but not through the command line. But when I execute the command: php test.php, it says unknown class PDO. I think it has something to do with the thread-safety difference. Because, when I execute the above… >>> More