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C# Mutex Example

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So far, I have not observed any error messages about deadlock situations, nor any server restarts. says: September 29, 2006 at 1:15 pm Way behind on posting and cleaning out the inbox, but wanted to capture this information.  Just got a new laptop at work (which is Comment 2 Joe Orton 2004-11-25 14:48:04 UTC Google finds reports of this happening on Solaris when using fcntl locking with 1.3 so perhaps that rules it being anything to do with FUTURE DIRECTIONS None.

SEE ALSO pthread_mutex_destroy(), pthread_mutex_timedlock(), the Base Definitions volume of IEEEStd1003.1-2001, CHANGE HISTORY First released in Issue 5. Otherwise, an error number is returned to indicate the error. SEE ALSO pthread_mutex_init(), pthread_mutex_destroy(), . Also it is recommended to put the unlock method in the ensure clause.

C# Mutex Example

For any given key, RedisMutex: prefix will be automatically prepended. That would throw an exception, and that could cause this code to behave badly (ie, the lock is still held by the thread that has the exception, and another thread can Put the file operations in try/catch block, and release the lock in the finally block. IEEEStd1003.1-2001/Cor2-2004, item XSH/TC2/D6/98 is applied, updating the ERRORS section so that the [EDEADLK] error includes detection of a deadlock condition.

Explicitly load files. Each time the thread unlocks the mutex, the lock count shall be decremented by one. For further rationale on the XSI extended mutex types, see the Rationale (Informative) volume of IEEEStd1003.1-2001. result = func.Invoke(fileStream); } } l.LogInformation("Released state file lock.", (Int32)VipEvent.ReleasedStateLock); return true; // note exceptions may leak out of this method.

To avoid that, put the log inside the lock. 2) Check out using the Monitor class, which I know works in C# and I'd assume works in ASP.NET. Does that start another thread, or is it entirely within the one thread? Version… May 25, 2012 redis-mutex.gemspec Redis::Mutex is now RedisMutex. Optional Password I have read and agree to the Terms of Service and Privacy Policy Please subscribe me to the CodeProject newsletters Submit your solution!

Explicitly load files. If a thread attempts to unlock a mutex that it has not locked or a mutex which is unlocked, an error shall be returned. When answering a question please: Read the question carefully. Why isn't the religion of R'hllor, The Lord of Light, dominant?

C# Lock

more stack exchange communities company blog Stack Exchange Inbox Reputation and Badges sign up log in tour help Tour Start here for a quick overview of the site Help Center Detailed class RoomController < ApplicationController before_filter { @room = Room.find(params[:id]) } def enter RedisMutex.with_lock(@room) do # key => "Room:123" # do something exclusively end render text: 'success!' rescue RedisMutex::LockError render text: 'failed C# Mutex Example For that, you can just simply try to get the lock, and fail gracefully otherwise. Comment 6 Ed Wittmann 2005-05-19 23:21:33 UTC I am also noticing this problem on Solaris 8 - I am using Sun's OpenSSL package that is installed as part of their Crypto

They really are two different tasks. What is the cost of a mutex?4ASP.Net — monitors/lock or mutex2Pthread Mutex locking0Mutex can't acquire lock0pthread mutex lock issue3Mutex release issues in ASP.NET C# code1Why use a Mutex to lock on? The state is deserialized from the file when the web application starts. As such, the implementation of mutexes should be as efficient as possible, and this has ramifications on the features available at the interface.

End of informative text. This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL) Top Experts Last 24hrsThis month OriginalGriff 180 Peter Leow 140 ProgramFOX The mutex is set to unlock when the data is no longer needed or the routine is finished. I do have more than one Listen directive I would like to avoid using prefork, so one of these days I will try to change the AcceptMutex to pthread to see

lib Redis::Mutex is now RedisMutex. Do you need your password? Reply WebLog says: July 14, 2007 at 11:06 pm 1、 当前标识(NT AUTHORITYNETWORK SERVICE)没有对“C:WINDOWSMicrosoft.NETFrameworkv2.0.50727Temporary Reply feifeiyaqi3 says: August 4, 2007 at 12:05 am 正解: http://blogs.msdn.com/jorman/archive/2006/07/24/system-invalidoperationexception-mutex-could-not-be-created.aspx 1) C:WINDOWSMicrosoft.NETFrameworkv2.0.50727ASPNET_regiis -ga yourdomainyouraccount 2) iisreset Reply

Version… May 25, 2012 LICENSE Go minimal, walking away from Jeweler.

The handle will typically be devenv.exe (the IDE for Visual Studio) and aspnet_wp.exe or w3wp.exe. Solving proportions with 3 ratios, x:3:y = -2:3:-4 Can time travel make us rich through trading, and is this a problem? Comment 7 Ed Wittmann 2005-05-19 23:26:11 UTC I should add that I experienced this problem with 2.0.53 - I have also upgraded to 2.0.54. (In reply to comment #6) > I The pthread_mutex_lock(), pthread_mutex_trylock(), and pthread_mutex_unlock() functions may fail if: [EINVAL] The value specified by mutex does not refer to an initialized mutex object. [EAGAIN] [XSI] The mutex could not be acquired

This operation shall return with the mutex object referenced by mutex in the locked state with the calling thread as its owner. [XSI] If the mutex type is PTHREAD_MUTEX_NORMAL, deadlock detection While it is more powerful than a monitor, a mutex requires interop transitions that are more computationally expensive than those required by the Monitor class. I cannot reproduce this locally - it only happens on my production servers (Win Server 2k3/IIS 6). Attempting to relock the mutex causes deadlock.

Otherwise, an error number is returned to indicate the error. The following new requirements on POSIX implementations derive from alignment with the Single UNIX Specification: The behavior when attempting to relock a mutex is defined. I have this problem with Apache 2.0.52 on Sun Solaris 8 (USparc), but I am unable to reproduce it using Apache 2.0.49 with the exact same configuration. Update 2: This lock is not used for any other call.

Version… May 25, 2012 .rspec Initial commit to redis-mutex. Note that if your job runs longer than 10 seconds, the lock will be automatically removed to avoid a deadlock situation in case your job is dead before releasing the lock. Synopsis In the following example, only one thread / process / server can enter the locked block at one time. Linked 24 How to determine if a previous instance of my application is running?

Old KB# 15394 Terms Of Use Privacy Statement Download Policy Microfocus.com Borland.com Support Line Corporate Blog Cookie Policy © 2001 - 2016 Micro Focus. Thanks! –Daniel Schaffer Jan 15 '09 at 23:03 | show 1 more comment up vote 2 down vote If some of the file operations fail, the lock will not be released. The function pthread_mutex_trylock() is identical to pthread_mutex_lock() except that if the mutex object referenced by mutex is currently locked (by any thread, including the current thread), the call returns immediately. Terms of Service Layout: fixed | fluid CodeProject, 503-250 Ferrand Drive Toronto Ontario, M3C 3G8 Canada +1 416-849-8900 x 100 The Open Group Base Specifications Issue 6 IEEE Std 1003.1, 2004

For instance, if you pass a Room object with id of 123, the actual key in Redis will be RedisMutex:Room:123. If you give a proc object to the after_failure option, it will get called after locking attempt failed.