major revisions

src/ca/tcpRecvWatchdog.cpp

@@ -0,0 +1,72 @@
+
+/* * $Id$
+ *
+ *                    L O S  A L A M O S
+ *              Los Alamos National Laboratory
+ *               Los Alamos, New Mexico 87545
+ *
+ *  Copyright, 1986, The Regents of the University of California.
+ *
+ *  Author: Jeff Hill
+ */
+
+#include "iocinf.h"
+
+tcpRecvWatchdog::tcpRecvWatchdog 
+    (double periodIn, osiTimerQueue & queueIn, bool echoProtocolAcceptedIn) :
+    osiTimer (periodIn, queueIn),
+    period (periodIn),
+    echoProtocolAccepted (echoProtocolAcceptedIn),
+    echoResponsePending (false)
+{
+}
+
+void tcpRecvWatchdog::echoResponseNotify ()
+{
+    this->echoResponsePending = false;
+    this->reschedule ( this->period );
+}
+
+void tcpRecvWatchdog::expire ()
+{
+    /*
+     * remain backwards compatible with old servers
+     * ( this isnt an echo request )
+     */
+    if ( ! this->echoProtocolAccepted ) {
+        this->noopRequestMsg ();
+    }
+    else if ( this->echoResponsePending ) {
+        ca_printf ( "CA server unresponsive for %f sec. Disconnecting\n", this->period );
+        this->shutdown ();
+    }
+    else {
+        this->echoRequestMsg ();
+        this->echoResponsePending = true;
+    }
+}
+
+void tcpRecvWatchdog::destroy ()
+{
+    // ignore timer destroy requests
+}
+
+bool tcpRecvWatchdog::again () const
+{
+    return true;
+}
+
+double tcpRecvWatchdog::delay () const
+{
+    if (this->echoResponsePending) {
+        return CA_ECHO_TIMEOUT;
+    }
+    else {
+        return this->period;
+    }
+}
+
+const char *tcpRecvWatchdog::name () const
+{
+    return "TCP Receive Watchdog";
+}