How to use std::stringstream create flexible debug stream?

[ziyanjoe]

Hi!

I am writing a program for the robot that runs as a daemon on a linux machine. Since debug output cannot be seen on stdout, I want to create an iostream to handle all the output messages. However, I do not want to use a file or output to the clog since I want to achieve the debug message remotely through TCP connection. I've already built a TCP server for transmitting data, all i need is an "endless" stringstream.

I tried to code this way:

stringstream debug;
debug<<"Debug message"<<endl;
 
//create another thread that might output debug message
MyThread *th = new MyThread(debug);
th->start();
 
//for now output debug message to stdout whenever possible
while(debug)
{
  char c;
  debug.get(c);
  if(debug) cout<<c;
}
 

The problem is, after reading the first line of debug message ("Debug message"), stringstream thinks that we reached an end which is not what I want. I want that somehow the stringstream becomes "endless", and blocks when trying to read from empty buffer.

I will be really grateful if you can help me on this problem. Thank you very much!