nonblocking

I believe that if we call close system call on a non-blocking socket it returns immediately, then how to handle the response? whether it is closed or not? in other words what is the behavior of the socket system call close on a non-blocking socket? if we call close system call on a non-blocking socket it returns immediately The socket is always closed: the connection may still be writing to the peer. But your question embodies a fallacy: if you call close() on any socket it will return immediately. Closing and writing to a socket is asynchronous. You can control that with SO_LINGER as per the

I have this code segment that is designed to connect to a server using a socket connection. However if it can not connect to the server within a certain amount of time I would like it to stop trying. I tried to do this with this nonblocking socket and the select command but select is always returning 1 indicating that the server exists when nothing exists at the address I give it. Any Ideas? SOCKET tcp_client( char *hname, char *sname ) { fd_set fdset; struct sockaddr_in peer; SOCKET s; FD_ZERO(&fdset); // FD_SET(STDIN, &fdset); FD_SET(s, &fdset); errno=1; struct timeval tv; tv.tv_sec = 15;

To implement a lock free code for multithreading application I used volatile variables, Theoretically : The volatile keyword is simply used to make sure that all threads see the most updated value of a volatile variable; so if thread A updates the variable value and thread B read that variable just after that update is happened it will see the most updated value that written recently from thread A. As I read in a C# 4.0 in a Nutshell book that this is incorrect because applying volatile doesn’t prevent a write followed by a read from being swapped. Could this problem being solved by putting

In order to avoid javascript to block webpage rendering, can't we just put all all our JS files/code to be loaded/executed simply before the closing </body> tag? All JS files and code would be downloaded and executed only after the all page has being rendered, so what's the need for tricks like the one suggested in this article about non blocking techniques to load JS files . He basically suggests to use code like: document.getElementsByTagName("head")[0].appendChild(script); in order to defer script laod while letting the webpage to be rendered, thus resulting in fast rendering speed of the

I have to do a job (using my web server) on a remote machine that takes about 10 minutes. I have used pxssh module in python for the same but it gives me "timeout error"(non blocking). Now, I am using paramiko but that comes back as soon as it gives the instruction. I want the web server to wait till the job is complete. Is there any python SSH module available for this. Or Can we achieve the same by changing any configuration settings of pxssh or paramiko ? You can use the recv_exit_status method on the Channel to wait for the command to complete: recv_exit_status(self) Return the exit status