473,805 Members | 2,143 Online
Bytes | Software Development & Data Engineering Community
+ Post

Home Posts Topics Members FAQ

non-blocking connect in C?

Hi,

I understand how to operate non-blocking send and recv in C, so
as to exchange data with multiple connections without blocking with
every function call. My question is, how to set up a non-blocking
call to the connect function, so that it will just run the call and
immediately go on with whatever line is next in the code (even though
it might not have had time to finish establishing a connection), and
then the socket can somehow (how?) be checked later to see when/if the
connection finishes being established. This would probably involve
polling with the select function, I assume? Thanks very much in
advance! (I use GCC on a win XP machine) And P.S., this is not homework
Nov 13 '05 #1
3 4613
On 11 Jul 2003 00:56:56 -0700, in comp.lang.c , ad********@yaho o.com
(Trishia Rose) wrote:
Hi,

I understand how to operate non-blocking send and recv in C, so
as to exchange data with multiple connections without blocking with
every function call. My question is, how to set up a non-blocking
call to the connect function,


unfortunately connect(), recv() and send() are not part of C.

You need to ask this question in a unix programming group, since
networking is typically topical there (don't worry that you're using
XP, the TCP/IP networking is essentially common).
--
Mark McIntyre
CLC FAQ <http://www.eskimo.com/~scs/C-faq/top.html>
CLC readme: <http://www.angelfire.c om/ms3/bchambless0/welcome_to_clc. html>
----== Posted via Newsfeed.Com - Unlimited-Uncensored-Secure Usenet News==----
http://www.newsfeed.com The #1 Newsgroup Service in the World! >100,000 Newsgroups
---= 19 East/West-Coast Specialized Servers - Total Privacy via Encryption =---
Nov 13 '05 #2
Look up fcntl and SO_NONBLOCK in your manual.
Nov 13 '05 #3
Jason wrote:
Look up fcntl and SO_NONBLOCK in your manual.


Actually, ITYM O_NONBLOCK.

Nov 13 '05 #4

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

Similar topics

12
4439
by: lothar | last post by:
re: 4.2.1 Regular Expression Syntax http://docs.python.org/lib/re-syntax.html *?, +?, ?? Adding "?" after the qualifier makes it perform the match in non-greedy or minimal fashion; as few characters as possible will be matched. the regular expression module fails to perform non-greedy matches as described in the documentation: more than "as few characters as possible"
5
3760
by: klaus triendl | last post by:
hi, recently i discovered a memory leak in our code; after some investigation i could reduce it to the following problem: return objects of functions are handled as temporary objects, hence their dtor is called immediately and not at the end of the function. to be able to use return objects (to avoid copying) i often assign them to a const reference. now, casting a const return object from a function to a non-const reference to this...
25
7668
by: Yves Glodt | last post by:
Hello, if I do this: for row in sqlsth: ________pkcolumns.append(row.strip()) ________etc without a prior:
32
4533
by: Adrian Herscu | last post by:
Hi all, In which circumstances it is appropriate to declare methods as non-virtual? Thanx, Adrian.
8
3521
by: Bern McCarty | last post by:
Is it at all possible to leverage mixed-mode assemblies from AppDomains other than the default AppDomain? Is there any means at all of doing this? Mixed-mode is incredibly convenient, but if I cannot load/unload/reload extensions into my large and slow-to-load application during development without restarting the process then the disadvantages may outweigh the advantages. I've got a mixed-mode program in which I create a new AppDomain...
14
8485
by: Patrick Kowalzick | last post by:
Dear all, I have an existing piece of code with a struct with some PODs. struct A { int x; int y; };
11
3461
by: ypjofficial | last post by:
Hello All, So far I have been reading that in case of a polymorphic class ( having at least one virtual function in it), the virtual function call get resolved at run time and during that the vtable pointer is made use of.. eg. class one {
2
6127
by: Ian825 | last post by:
I need help writing a function for a program that is based upon the various operations of a matrix and I keep getting a "non-aggregate type" error. My guess is that I need to dereference my pointers, but I'm not sure. Please help. The code: void equate(matrix *A, matrix *B) { int i, j; assert(A.row_dim == B.col_dim && A.col_dim == B.col_dim); for(i=0; i < A.row_dim; i++) for(j=0; j < A.col_dim; j++)
0
2349
by: amitvps | last post by:
Secure Socket Layer is very important and useful for any web application but it brings some problems too with itself. Handling navigation between secure and non-secure pages is one of the cumbersome jobs. When a non-secure page references a secure page with relative URL, the web server generates error until absolute URL with https prefix is used. On the other hand when a secure page references a non-secure page, the non-secure page will be...
399
12979
by: =?UTF-8?B?Ik1hcnRpbiB2LiBMw7Z3aXMi?= | last post by:
PEP 1 specifies that PEP authors need to collect feedback from the community. As the author of PEP 3131, I'd like to encourage comments to the PEP included below, either here (comp.lang.python), or to python-3000@python.org In summary, this PEP proposes to allow non-ASCII letters as identifiers in Python. If the PEP is accepted, the following identifiers would also become valid as class, function, or variable names: Löffelstiel,...
0
9718
marktang
by: marktang | last post by:
ONU (Optical Network Unit) is one of the key components for providing high-speed Internet services. Its primary function is to act as an endpoint device located at the user's premises. However, people are often confused as to whether an ONU can Work As a Router. In this blog post, we’ll explore What is ONU, What Is Router, ONU & Router’s main usage, and What is the difference between ONU and Router. Let’s take a closer look ! Part I. Meaning of...
0
9596
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 synchronization. With a Microsoft account, language settings sync across devices. To prevent any complications,...
0
10613
Oralloy
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. Here is my compilation command: g++-12 -std=c++20 -Wnarrowing bit_field.cpp Here is the code in...
0
10107
tracyyun
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 choice of these technologies. I'm particularly interested in Zigbee because I've heard it does some...
0
9186
agi2029
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 launch it, all on its own.... Now, this would greatly impact the work of software developers. The idea...
0
6876
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 into image. Globals.ThisAddIn.Application.ActiveDocument.Select();...
0
5678
by: adsilva | last post by:
A Windows Forms form does not have the event Unload, like VB6. What one acts like?
1
4327
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
2
3846
muto222
by: muto222 | last post by:
How can i add a mobile payment intergratation into php mysql website.

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.