473,554 Members | 2,452 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

question on multithreading, pipes


I have written a script which is performing some tasks in
multithreading mode: the main thread is opening a connection to a
distant server and all the threads that I start will have to perform
actions on the remote server using the connection initiated by the main
thread. At first sight, the only way I could achieve that in a proper
manner (ie without having to open a connection to the remote server in
every single thread and close it at the end of the thread) would be to
use a pipe that I would use in all the threads, for example:
* main thread:
fw, fr = os.popen2('/bin/ksh')
fw.write('Sinit ')
* other threads:
fw.write('perfo rm action')

but if I do that, I need to queue the events, which means I have to
serialize the jobs perform by the threads, which is clearly not what I
want as I am using threads :-)
so my question is: how could I get around this without giving up
multithreading ?
any help appreciated.

Jul 18 '05 #1
0 1453

This thread has been closed and replies have been disabled. Please start a new discussion.

Similar topics

by: Christian Hammers | last post by:
Hello I would like to call a unix shellscript from within a PHP script and - write data to its STDIN - read data from its STDOUT *and* STDERR - get its exit code afterwards proc_open seems to be the right thing to use but I have the problem that the called program gives >8kb data on both stdout/stderr back which causes my PHP script to...
by: dixp | last post by:
I'm new to writing multithreaded apps and I have a design question. I have a winforms app and a class which has a method that does processing which is time intensive. I want the user to be able to kick off the process and continue to work in the appliaction while getting progress updates and the ability to cancel. The method that seems...
by: Mark Yudkin | last post by:
The documentation is unclear (at least to me) on the permissibility of accessing DB2 (8.1.5) concurrently on and from Windows 2000 / XP / 2003, with separate transactions scope, from separate threads of a multithreaded program using embedded SQL. Since the threads do not need to share transaction scopes, the sqleAttachToCtx family of APIs do...
by: Hans J?rg Brinksmeyer | last post by:
Hi, does anyone have an idea for this problem: I use anonymous pipes to steer a console program under Win2000 with a second 'steering aplication'. The stdin and output are redirected to pipes. The console application has several fgets() and fgetc() to read strings and chars. This works very fine with the pipes.
by: Rich | last post by:
Hello, I have set up a multithreading routine in a Test VB.net proj, and it appears to be working OK in debug mode and I am not using synchronization. Multithreading is a new thing for me, and I just wanted to ask if I am missing anything based on the following scenario. My test app pulls data from a large external data source which...
by: Ray | last post by:
Hello, Greetings! I'm looking for a solid C++ multithreading book. Can you recommend one? I don't think I've seen a multithreading C++ book that everybody thinks is good (like Effective C++ or Exceptional C++, for example). Platform-specific (e.g.: Win32, POSIX) is OK, as long as it's good :) Thank you, Ray
by: ZhukovL | last post by:
I'm having some trouble implementing the handling of multiple pipes in a shell I'm writing. I was hoping someone could point me in the right direction because I really cant see where I'm going wrong. Its supposed to work as follows: main shell forks off a child shell, the child shell sets up the pipes and forks off n-1 other shells (where n...
by: dgk | last post by:
I trying to use a named pipe but can't figure out how to get the callback to work: Module Module1 Private ps As System.IO.Pipes.NamedPipeServerStream Public Sub main() Application.EnableVisualStyles() Try ps = New System.IO.Pipes.NamedPipeServerStream("Test") ps.BeginWaitForConnection(AddressOf HandleConnection, "Test")
by: andrewb | last post by:
Hi all, Having some trouble using named pipes and Visual Basic .NET and would appreciate and help you could offer. Essentially I am trying to develop a simple client/server application that exchanges text messages using named pipes. The internet resources seem a bit scarce and the only Microsoft resource I can find is...
by: Hystou | last post by:
Most computers default to English, but sometimes we require a different language, especially when relocating. Forgot to request a specific language before your computer shipped? No problem! You can effortlessly switch the default language on Windows 10 without reinstalling. I'll walk you through it. First, let's disable language...
by: Oralloy | last post by:
Hello folks, I am unable to find appropriate documentation on the type promotion of bit-fields when using the generalised comparison operator "<=>". The problem is that using the GNU compilers, it seems that the internal comparison operator "<=>" tries to promote arguments from unsigned to signed. This is as boiled down as I can make it. ...
by: jinu1996 | last post by:
In today's digital age, having a compelling online presence is paramount for businesses aiming to thrive in a competitive landscape. At the heart of this digital strategy lies an intricately woven tapestry of website design and digital marketing. It's not merely about having a website; it's about crafting an immersive digital experience that...
by: tracyyun | last post by:
Dear forum friends, With the development of smart home technology, a variety of wireless communication protocols have appeared on the market, such as Zigbee, Z-Wave, Wi-Fi, Bluetooth, etc. Each protocol has its own unique characteristics and advantages, but as a user who is planning to build a smart home system, I am a bit confused by the...
by: agi2029 | last post by:
Let's talk about the concept of autonomous AI software engineers and no-code agents. These AIs are designed to manage the entire lifecycle of a software development project—planning, coding, testing, and deployment—without human intervention. Imagine an AI that can take a project description, break it down, write the code, debug it, and then...
by: isladogs | last post by:
The next Access Europe User Group meeting will be on Wednesday 1 May 2024 starting at 18:00 UK time (6PM UTC+1) and finishing by 19:30 (7.30PM). In this session, we are pleased to welcome a new presenter, Adolph Dupré who will be discussing some powerful techniques for using class modules. He will explain when you may want to use classes...
by: conductexam | last post by:
I have .net C# application in which I am extracting data from word file and save it in database particularly. To store word all data as it is I am converting the whole word file firstly in HTML and then checking html paragraph one by one. At the time of converting from word file to html my equations which are in the word document file was convert...
by: 6302768590 | last post by:
Hai team i want code for transfer the data from one system to another through IP address by using C# our system has to for every 5mins then we have to update the data what the data is updated we have to send another system
by: bsmnconsultancy | last post by:
In today's digital era, a well-designed website is crucial for businesses looking to succeed. Whether you're a small business owner or a large corporation in Toronto, having a strong online presence can significantly impact your brand's success. BSMN Consultancy, a leader in Website Development in Toronto offers valuable insights into creating...

By using Bytes.com and it's services, you agree to our Privacy Policy and Terms of Use.

To disable or enable advertisements and analytics tracking please visit the manage ads & tracking page.