Added methos used to connect a socket asynchronously.

git-svn-id: http://voip.null.ro/svn/yate@5489 acf43c95-373e-0410-b603-e72c3f656dc1

engine/Socket.cpp

@@ -1405,6 +1405,39 @@ bool Socket::connect(struct sockaddr* addr, socklen_t addrlen)
     return checkError(::connect(m_handle,addr,addrlen));
 }
 
+// Asynchronously connects the socket to a remote address
+bool Socket::connectAsync(struct sockaddr* addr, socklen_t addrlen, unsigned int toutUs, bool* timeout)
+{
+    if (!canSelect())
+	return false;
+    if (connect(addr,addrlen))
+	return true;
+    if (!inProgress())
+	return false;
+    unsigned int intervals = toutUs / Thread::idleUsec();
+    // Make sure we wait for at least 1 timeout interval
+    if (!intervals)
+	intervals = 1;
+    clearError();
+    while (intervals) {
+	bool done = false;
+	bool event = false;
+	if (!select(0,&done,&event,Thread::idleUsec())) {
+	    if (!error() && (done || event))
+		updateError();
+	    if (!error())
+		return true;
+	    return false;
+	}
+	if (Thread::check(false))
+	    return false;
+	intervals--;
+    }
+    if (timeout)
+	*timeout = true;
+    return false;
+}
+
 bool Socket::shutdown(bool stopReads, bool stopWrites)
 {
     int how;

yateclass.h

@@ -5964,6 +5964,30 @@ public:
     inline bool connect(const SocketAddr& addr)
 	{ return connect(addr.address(), addr.length()); }
 
+    /**
+     * Asynchronously connects the socket to a remote address.
+     * The socket must be selectable and in non-blocking operation mode
+     * @param addr Address to connect to
+     * @param addrlen Length of the address structure
+     * @param toutUs Timeout interval in microseconds
+     * @param timeout Optional boolean flag to signal timeout
+     * @return True on success
+     */
+    virtual bool connectAsync(struct sockaddr* addr, socklen_t addrlen, unsigned int toutUs,
+	bool* timeout = 0);
+
+    /**
+     * Asynchronously connects the socket to a remote address.
+     * The socket must be selectable and in non-blocking operation mode
+     * @param addr Socket address to connect to
+     * @param toutUs Timeout interval in microseconds
+     * @param timeout Optional boolean flag to signal timeout
+     * @return True on success
+     */
+    inline bool connectAsync(const SocketAddr& addr, unsigned int toutUs,
+	bool* timeout = 0)
+	{ return connectAsync(addr.address(),addr.length(),toutUs,timeout); }
+
     /**
      * Shut down one or both directions of a full-duplex socket.
      * @param stopReads Request to shut down the read side of the socket