U++ forum: Welcome to the forum

Status & Roadmap

Authors & License

Funding Ultimate++

Search on this site

Search in forums

Home » U++ Library support » U++ MT-multithreading and servers » MT/Locking Questions

Show: Today's Messages :: Show Polls :: Message Navigator
E-mail to friend

Return to the default flat view

Create a new topic

Submit Reply

Re: MT/Locking Questions [message #15599 is a reply to message #15591]

Wed, 30 April 2008 10:51

mirek is currently offline

mirek
Messages: 14265
Registered: November 2005

Ultimate Member

mr_ped wrote on Tue, 29 April 2008 15:49

I bet this info is nowhere in Docs, isn't it? Very Happy

Very Happy

(didn't find it trough Search on this site: "Mutex -forum")

Edit:
So if I understand you correctly, as long as I don't USE the Mutex in init block, I can freely use "static Mutex some_lock;", right?
If I am sure it will be initialized before I will try to use it, i.e. I will use it only outside of ctors after the application is started, that is.

Unfortunately, not.

At least, you cannot use it in function body. The problem is that static initialization itself is NOT MT safe.

So e.g.

void Fn()
{
static Mutex x;
}

would make Fn require external locking, because two threads might race when checking that flag used to implement static initialization.

Mirek

P.S.: Oh I guess you have in fact covered this issue in your post....

[Updated on: Wed, 30 April 2008 10:58]

Report message to a moderator

Send a private message to this user

[Message index]

		MT/Locking Questions By: captainc on Mon, 28 April 2008 15:23
		Re: MT/Locking Questions By: mirek on Mon, 28 April 2008 19:41
		Re: MT/Locking Questions By: captainc on Mon, 28 April 2008 20:00
		Re: MT/Locking Questions By: mr_ped on Mon, 28 April 2008 20:57
		Re: MT/Locking Questions By: captainc on Mon, 28 April 2008 22:10
		Re: MT/Locking Questions By: mr_ped on Tue, 29 April 2008 10:03
		Re: MT/Locking Questions By: mirek on Tue, 29 April 2008 19:09
		Re: MT/Locking Questions By: mr_ped on Tue, 29 April 2008 21:49
		Re: MT/Locking Questions By: mirek on Wed, 30 April 2008 10:51
		Re: MT/Locking Questions By: mr_ped on Wed, 30 April 2008 16:04
		Re: MT/Locking Questions By: mirek on Wed, 30 April 2008 21:05

Previous Topic:	How to send broadcast
Next Topic:	PTHREAD_RECURSIVE_MUTEX_INITIALIZER_NP not defined

Goto Forum:

-=] Back to Top [=-

[ Syndicate this forum (XML) ] [

] [

PDF

]

Current Time: Wed Jul 16 01:44:34 CEST 2025

Total time taken to generate the page: 0.02501 seconds