Re: [Boost-users] boost::mutex over a socket

14 Mar 2011

      Ok...I've done something like this:

void executeThread()
{
  m_mutex.lock();
  length=boost::asio::read(socket_,boost::asio::buffer(msg,sizeof(msg)),   ec);
  m_mutex.unlock();

  m_mutex.lock();
 boost::asio::write(socket_,boost::asio::buffer(msgToSend,sizeof(msgToSend)));
  m_mutex.unlock();
}

and I call two thread inside a member's function Server Class:

void handle_accept()
{
    ....
    ....

  if(fork()==0)
 {
        boost::thread thread_read(&server::executeThread,this);
        boost::thread thread_write(&server::executeThread,this);
        thread_read.join();
        thread_write.join();
 }
 else
{
         ....
        ....
}

}

Can I obtain in this way a thread that read and the other that write? 
and to obtain a ciclyc behaviour, where I have to put the for(;;)?thanks..

________________________________
Da: Kulti <kultihell@gmail.com>
A: boost-users@lists.boost.org
Inviato: Lun 14 marzo 2011, 16:59:39
Oggetto: Re: [Boost-users] boost::mutex over a socket

On Mon, Mar 14, 2011 at 3:28 PM, Marco Piacentini
<marcopiacenta@yahoo.it> wrote:
...
Hi guys...I've 2 thread and I would like that one of these performs a
synchronous read, menawhile the other performs a synchrounous write...adn
obviously they share the same socket.....the signature of the functions are
the following:
length=boost::asio::read(socket_,boost::asio::buffer(msg,sizeof(msg)), ec);
boost::asio::write(socket_,boost::asio::buffer(msgToSend,sizeof(msgToSend)));
socket_ is a private field of the classe Server.
How can I use the mutex to perform concurrently and safetly these
operations?
Thanks..
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The typical usage of mutex:
1. Add boost::mutex mutex_ as private field of class Server
2. When you read/write just add mutex_.lock() before and
mutex_.unlock() after. Also you can use boost::mutex::scoped_lock if
it's convenient.
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