Do I need an extern "C" {} block to include standard C headers in a C++ program. Only consider standard C headers which do not have counterparts in C++. For example: extern "C" { #include <fc...

Gcc and printf says that timer_t is pointer (on my linux). But what is placed by this pointer, and is NULL a valid timer id? Also, is it platform-specific thing, e. g. it is pointer on linux, int ...

Based on @Kametrixom answer, I have made some test application for parallel calculation of sum in an array. My test application looks like this: import UIKit import Metal class ViewController: U...

I am trying to understand the usage of socket APIs (recv, send, select, close, etc) on parallel threads. That means using one socket file descriptor on two parallel threads. I have gone through thi...

Is there a full POSIX implementation available in/for Windows 7 (I'm thinking of Windows Services for UNIX)? Is it available in every version of the OS (it seems not)? How does it add/improve or ...

I just want my main thread to wait for any and all my (p)threads to complete before exiting. The threads come and go a lot for different reasons, and I really don't want to keep track of all of t...

While using the POSIX Message queues I noticed there were some files being created on the File system with the name I was creating the queues. My questions : Q1. Do message queues queue up the mes...

If a linux process is waiting for I/O (i.e it is in SLEEP state) and a SIGKILL signal is issued against it, upon termination (STOPPED state) will it pass through RUNNING or READY state? In other w...

I've written a simple wrapper script for repeating commands when they fail called retry.py. However as I want to see the output of child command I've had to pull some pty tricks. This works OK for ...

In Linux, is it possible to get the reference count value (counter value of using a file) for a specified file by descriptor by using non-kernel API?

Maybe I'm just missing it, but isn't there a function equivalent to fprintf for file descriptors, or even a way to temporarily flip-flop between them?

Is the O_LARGEFILE flag needed if all that I want to do is write a large file (O_WRONLY) or append to a large file (O_APPEND | O_WRONLY)? From a thread that I read titled "Cannot write >2gb index ...

From what I have been reading on The Open Group website on fcntl, open, read, and write, I get the impression that whether O_NONBLOCK is set on a file descriptor, and hence whether non-blocking I/O...

If I fork a child process, and the child process exits before the parent calls waitpid, then is the exit status information that is set by waitpid still valid? If so, when does it become not valid;...