LinuxQuestions.org - Blog Entries

Why and how to use condition variables? - Pthreads

Posted 02-06-2013 at 01:40 AM by Aquarius_Girl
Updated 02-06-2013 at 05:55 AM by Aquarius_Girl

Q: What is a condition variable?
A: A condition variable is a variable of type `pthread_cond_t`. It is
used to suspend the thread execution until some condition is true.

Q: Is a condition variable dependent on a mutex lock to work properly? Why?
A: Explaining with an example:

Assumptions:
1. There is a variable `x` whose current value is 0.
2. There is a thread `threadA` whose task is to start some job once the
  variable `x` reaches the value 1000.
3. There

...

Aquarius_Girl

Senior Member

Posted in PThreads

Views 2973 Comments 0 Aquarius_Girl is offline

#! toddler just like me (:

Posted 01-31-2013 at 08:26 AM by jamison20000e
Updated 09-04-2017 at 03:56 PM by jamison20000e

Tags education, free, fun, kids, linux

My nephew JJ is almost two: so of course I'm setting him up a (literally this (now on Xfce; LibreOffice Writer; Iceweasel; Google Drive) computer (vaio-pcv-r556ds | Linux-Debain-Crunchbangcrun\#!-Openbox\*). For the first year I will lock it down with baby-friendly programs mostly only icons and widgets (e.g: solar system, bouncing ball, sliding block puzzle, moon and stuff) so no taskbar on WMs like: Educational Desktops(most *nix flavors offer free Edu-D-tops i.g. Sugar or educational-desktop-lxde...

jamison20000e

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Posted in Newbie++

Views 10787 Comments 5 jamison20000e is offline

C++ had lambda functions!

Posted 01-31-2013 at 01:21 AM by hydraMax (Bits and Pixels)

Tags c++, programming

I'm doing a CS class which forces me to use C++. I was not very excited about this. However, I have recently be greatly encouraged by the discovery that C++ does, in fact, have lambda functions (or, more properly, anonymous functions) at least in the C++11 standard:

https://en.wikipedia.org/wiki/Anonym...ctions#C.2B.2B

Basically, the big deal here is that I can construct new functions /inside/ of other functions, and even capture variables from the context. This,...

hydraMax

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bogged down blog

Posted 01-29-2013 at 02:45 AM by pandanuma

Tags non scents

so...dont post to your own blog nimnul
took long time find my blog link on the right...
clik that to make nice blog
ya...over there...on the right...under my lq...

excuses are no excuse
i blog as much as i exercise
therefour i am
...not a blogger
excuses are no uses

stay tooned for more bloggonie
but dont hold yur berette

next time i will figure out to catagorize
perhaps hep is in blog settings...

pandanuma

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Controlling VLC via openbox key bindings... and wget(!)

Posted 01-28-2013 at 10:21 AM by the dsc (linux-related notes)
Updated 01-28-2013 at 06:10 PM by the dsc (fixing some stuff, redirection didn't work that way)

On openbox' rc.xml, in the corresponding section:

Code:

    <keybind key="W-z">
      <action name="Execute">
<execute>wget http://127.0.0.1:8080/requests/status.xml?command=pl_previous -O /dev/null</execute> 
      </action>
    </keybind>
    <keybind key="W-x">
      <action name="Execute">
	<execute>wget http://127.0.0.1:8080/requests/status.xml?command=pl_next

...

the dsc

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