Non-blocking mode I/O either transfers at least one byte or returns immediately with an error or end of stream. Non-blocking algorithms refer to use of concurrency without the usual mutual exclusion primitives, guaranteeing that thread operations will not block indefinitely. This is usually handled with atomic value modification (increment/decrement) and/or reading (compare-and-exchange) operations.. It isn't clear which this tag is intended for.
Questions tagged [nonblocking]
1597 questions
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Subtleties of Non Blocking Assignments
Here in this example,a non-blocking assignment propagates to a continuous assignment. Can this cause any execution paradigms.Please elaborate on this piece of code- Possible errors, How can it be removed and good style of coding.
always @(posedge…
chitranna
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How can I get the status of non-blocking jobs of gearman submit_multiple_jobs?
how can I tell if a background job or a non-blocking request by gearman client is successful or not?
while (True):
jobs = getJobs()
submitted_requests = gm_client.submit_multiple_jobs(jobs, background = False, wait_until_complete = False)
…
shilk
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C# Best approach for a responsive UI during SQL query using COM interop
I am making a C# DLL plugin for a EXE written in VB6. I do not have access to the source of the EXE. The DLL itself works and communicates fine with the EXE.
Here is the process for a event:
User issues command on EXE which then calls a function in…
Lynxy
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Bash script - Start two background processes, wait for both to complete and get their output in variables
So, in my script, I want to start two processes in the background, after this I want to wait for both to complete and I want to get the stdout of the processes in variables.
To run in background, I can use
command &
To get the result in a variable I…
Hashken
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Do my (beginner) understanding of blocking and non blocking io is correct?
Right now I do a lot of research about concurrency and parallelism. Could you tell me if I understand correctly (on os level):
Blocking io:
When I explicitly wait for connection (ie. in Ruby:)
conn = socket.accept
So my thread is blocked until I…
Sławosz
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how to correctly close SocketChannel java in JAVA?
I am developing multithreading non-blocking tcp server and client in Java. I have a problem with the server realizing that the client socket is closed. For him it's allways open. Here is the code and the output of my code:
Server:
/*
* To change…
AdrianES
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Implementing a non-blocking TCP Server
I am trying to implement a TCP server which will not hang (potentially) forever during a recv or sendall operation.
I thought it would be enough to specify a timeout for the active socket, but this seems not to be the case: see here
So, how could I…
Rickson
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Example for Client socket that try to connect to the server for 2 seconds
Someone can add to my Example under, the code that define the Client socket try to connect to the server for 2 seconds please ?
I read about that and i don't successful to do that, because of that i ask for an example.
Example:
Client:
import…
MultiPython
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Problems with recv and timeouts
1) Is there a difference of the meaning of return values of sockets that are blocking and non-blocking? Sometimes recv() returns 0 even select() succeded before AND the peer on the other side did not close the half side of the connection as the…
HelloWorld
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Ncurses, non-blocking getch misses first character
Im using Linux and ncurses for my application, and i'm using getch as non-blocking using nodelay. The problem is that while looping with getch for the input, it always misses the first character. For example the input "Helloworld" would print up as…
Bennu
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1 answer
SSL and NIO Non-blocking Sockets
How do you recommend making a highly scalable SSL client?
Currently, I'm using plain Sockets to connect to the Apple APNS server which requires a non-HTTP SSL sockets. I considered using the NIO library, but it is lacking a SSLSocketChannel, and I…
notnoop
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JavaScript async script is blocking
I've been having trouble loading connect.facebook.net/en_GB/all.js. I'm not sure if it's happening to anyone else, but this script takes forever to load (sometimes doesn't load). It doesn't even timeout.
I have a PHP script which loads a few scripts…
Dalton Tan
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Synchronized blocks and Locks
I have two threads and I am currently doing locking using an Object's notify() and wait() methods inside Synchronized blocks. I wanted to make sure that the main thread is never blocked so I used a boolean this way (only relevant code…
Abdullah Shoaib
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java.nio DatagramChannel non-blocking mode.. you still have to block?
I've been looking into java.nio's asynchronous capabilities, and so far I am a fan of the AsynchronousByteChannel class, as it lets me provide completion callbacks for each read or write operation. This adapts well with scala's Future class.
Now I'm…
Dylan
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2 answers
Python socket not receiving anything
I'm trying to receive a variable length stream from a camera with python, but get weird behaviour. This is Python 2.6.4 (r264:75706) on linux(Ubuntu 9.10)
The message is supposed to come with a static header followed by the size, and rest of the…
Atilla Filiz
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