I basically want to inform main that a client disconnected in order to decrement the thread counter.
Why not use a semaphore? They're threadsafe counters which do exactly what you want. See man sem_init and man sem_wait and man sem_post.
Code:
sem_t sem;
void main_thread(void)
{
sem_init(&sem, 0, 5); // Create sem with value of 5
while(1)
{
sem_wait(&sem); // If sem goes below 5, main will wait until something else adds
if(!running) break;
launch_thread(threadfunc);
}
}
void threadfunc(void)
{
while(1)
{
do_stuff;
if(!running) break;
}
sem_post(&sem); // add 1 to sem
}
Hi all,
I'm trying to write a program that has some data it wants to send through a filter program(in this case tr), and then recieve the output from that filter program. The way I'm trying to do it is by setting up two pipes between the programs and piping the data in through one pipe and back... (2 Replies)
Hi,
I am stuck up with a strange problem.
I am writing an application - a kinda tracker that reads data from memcache and invokes theads to process each record of the memcache.
I dont want to join all my threads because my tracker should poll the cache in regular intervals say sum 300... (2 Replies)
i have a parent process and 5 child process.
As soon as the parent process is completed the 5 child processes need to start simultaneously (like multithreading)
All I need to do in a shell script
the child process is a function
can any one help me on this
thanks in advance (1 Reply)
Hi guys, I'm having some problem here, I'm studying pipes, and i want to create a shell in C and at this point a don't want to use semaphores, instead I want to use tricks. Straight to the doubt: I've a parent and a child process, and both of them has some code to execute, and the child process... (5 Replies)
Parent Thread Of Child Thread
Suppose a process creates some threads say threadC and threadD.
Later on each of these threads create new child threads say threadC1, threadC2, threadC3 etc. So a tree of threads will get created.
Is there any way to find out the parent thread of one such... (1 Reply)
Hi all,
Can I create multiple threads using single thread_id
like
pthread_t thread_id;
pthread_create(&thread_id, NULL, &print_xs, NULL);
pthread_create(&thread_id, NULL, &print_ys, NULL);
pthread_create(&thread_id, NULL, &print_zs, NULL);
pthread_join(thread_id, NULL);
what... (2 Replies)
Hi!
I am writing a C program that will create a child, child will create a thread and the thread will send a message to a unnamed pipe and will print the message before exiting.
here is my work:
#include <sys/types.h>
#include <unistd.h>
#include <stdio.h>
#include <stdlib.h>
#include... (6 Replies)
What is the best way for a parent to kill a child thread that has blocked on a command it cannot finish and will never read another line of its code? Will pthread_cancel() work with a thread that will never stop processing its current line of code? Thanks. (4 Replies)
Hi,
I am trying my hand in networking programming in C, and got stuck in piping.
I was following some tutorial and did the forking like :
while (1)
{
newsockfd = accept(sockfd,
(struct sockaddr *) &cli_addr, &clilen);
if (newsockfd < 0)
... (4 Replies)
I would like to know is there any we can kill a single thread among multiple threads belongs to process?
Since Signal action is process wise not per thread, i strongly feel that we can not or for that mater from external sources as well single thread can not be killed which is critical section... (2 Replies)
Discussion started by: murali242512
2 Replies
LEARN ABOUT DEBIAN
shevek_server_connection
shevek::server< client, serverdata >::connection(3) Library Functions Manual shevek::server< client, serverdata >::connection(3)NAME
shevek::server< client, serverdata >::connection -
Base of the client class which is implemented by the calling program.
SYNOPSIS
#include <server.hh>
Inherits shevek::refbase.
Public Member Functions
void continue_reading ()
This is called after in->unread (), to resume accepting data from this connection.
~connection ()
Destructor.
Public Attributes
Glib::RefPtr< shevek::fd > in
The input socket. The client can stop reading from this connection by calling in->unread ().
Glib::RefPtr< shevek::fd > out
The output socket. This is used to send data to the connection.
Protected Member Functions
connection ()
The client class can construct this object with its create function.
Glib::RefPtr< server< client,
serverdata > > get_server ()"
Access to the server object which hosts this client.
void disconnect ()
This can be called by the client object to close this connection.
Friends
class server< client, serverdata >
Detailed Description
template<typename client, typename serverdata>struct shevek::server< client, serverdata >::connection
Base of the client class which is implemented by the calling program.
A client object is created for every connection which is accepted. This class handles server administration and provides access to members
from the client class.
Author
Generated automatically by Doxygen for libshevek from the source code.
libshevek Fri May 11 2012 shevek::server< client, serverdata >::connection(3)