• Max Kaufmann <max.kaufmann gmail.com> Aug 19 2007
• Brad Roberts <braddr puremagic.com> Aug 19 2007
• BCS <ao pathlink.com> Aug 19 2007
• BCS <ao pathlink.com> Aug 19 2007

Max Kaufmann <max.kaufmann gmail.com> writes:

Consider this threaded socket server:

import std.stdio;
import std.string;
import std.socket;
import std.thread;

void main() {
	char[] ip = "127.0.0.1";
	int port = 12345;
	WorkerThread[] threads = [];
	writefln("Listening on "~ip~":"~toString(port));
	InternetAddress addr = new InternetAddress(ip,port);
	Socket sock = new TcpSocket();
	scope(exit) sock.close();
	sock.bind(addr);
	sock.listen(1);
	while(1) {
		WorkerThread worker = new WorkerThread(sock.accept());
		worker.start();
	}
}

class WorkerThread : Thread {
	private:
		Socket conn;
	public:
		this(Socket conn) {
			super();
			this.conn = conn;
			writefln("Spawning New Thread.");
		}

		int run() {
			byte[] bytesToSend = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
			conn.send(bytesToSend);
			return 0;
		}
}

Is Socket.send() synchronized, or do I need to synchronize it myself?

Brad Roberts <braddr puremagic.com> writes:

Max Kaufmann wrote:
 Consider this threaded socket server:
 
 import std.stdio;
 import std.string;
 import std.socket;
 import std.thread;
 
 void main() {
 	char[] ip = "127.0.0.1";
 	int port = 12345;
 	WorkerThread[] threads = [];
 	writefln("Listening on "~ip~":"~toString(port));
 	InternetAddress addr = new InternetAddress(ip,port);
 	Socket sock = new TcpSocket();
 	scope(exit) sock.close();
 	sock.bind(addr);
 	sock.listen(1);
 	while(1) {
 		WorkerThread worker = new WorkerThread(sock.accept());
 		worker.start();
 	}
 }
 
 class WorkerThread : Thread {
 	private:
 		Socket conn;
 	public:
 		this(Socket conn) {
 			super();
 			this.conn = conn;
 			writefln("Spawning New Thread.");
 		}
 
 		int run() {
 			byte[] bytesToSend = [0, 1, 2, 3, 4, 5, 6, 7, 8, 9];
 			conn.send(bytesToSend);
 			return 0;
 		}
 }
 
 Is Socket.send() synchronized, or do I need to synchronize it myself?


In your example, each connection is it's own unique socket, so there's 
no need to sync on anything.

Later,
Brad

BCS <ao pathlink.com> writes:

Reply to Max,

 Consider this threaded socket server:
 


 Is Socket.send() synchronized, or do I need to synchronize it myself?
 


I'm no expert, but I'd guess not, each thread will get it's own socket, so 
that shouldn't be a problem and I'd be surprised if Socket.send is not thread 
safe.

BCS <ao pathlink.com> writes:

Reply to Benjamin,

 Reply to Max,
 
 Consider this threaded socket server:
 


 
 Is Socket.send() synchronized, or do I need to synchronize it myself?
 




that you will

 not


need to syncroniz it

, each thread will get it's own
 socket, so that shouldn't be a problem and I'd be surprised if
 Socket.send is not thread safe.
 


x-b