major revisions

src/ca/netSubscription.cpp

@@ -0,0 +1,123 @@
+
+/*  $Id$
+ *
+ *                    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"
+
+tsFreeList < class netSubscription > netSubscription::freeList;
+
+netSubscription::netSubscription ( nciu &chan, chtype typeIn, unsigned long countIn, 
+    unsigned short maskIn, cacNotify &notifyIn ) :
+    baseNMIU (chan), cacNotifyIO (notifyIn),
+    mask (maskIn), type (typeIn), count (countIn)
+{
+}
+
+netSubscription::~netSubscription () 
+{
+    if ( this->chan.connected () ) {
+        caHdr hdr;
+        ca_uint16_t type, count;
+    
+        type = (ca_uint16_t) this->chan.nativeType ();
+        if ( this->chan.nativeElementCount () > 0xffff ) {
+            count = 0xffff;
+        }
+        else {
+            count = (ca_uint16_t) this->chan.nativeElementCount ();
+        }
+
+        hdr.m_cmmd = htons (CA_PROTO_EVENT_CANCEL);
+        hdr.m_available = this->id;
+        hdr.m_dataType = htons (type);
+        hdr.m_count = htons (count);
+        hdr.m_cid = this->chan.sid;
+        hdr.m_postsize = 0;
+
+        this->chan.piiu->pushStreamMsg (&hdr, NULL, true);
+    }
+}
+
+void netSubscription::destroy()
+{
+    delete this;
+}
+
+int netSubscription::subscriptionMsg ()
+{
+    unsigned long count;
+    struct monops msg;
+    ca_float32_t p_delta;
+    ca_float32_t n_delta;
+    ca_float32_t tmo;
+
+    /*
+     * clip to the native count and set to the native count if they
+     * specify zero
+     */
+    if ( this->count > this->chan.nativeElementCount () ){
+        count = this->chan.nativeElementCount ();
+    }
+    else {
+        count = this->count;
+    }
+
+    /*
+     * dont allow overflow when converting to ca_uint16_t
+     */
+    if ( count > 0xffff ) {
+        count = 0xffff;
+    }
+
+    /* msg header    */
+    msg.m_header.m_cmmd = htons (CA_PROTO_EVENT_ADD);
+    msg.m_header.m_available = this->id;
+    msg.m_header.m_dataType = htons ( static_cast <ca_uint16_t> (this->type) );
+    msg.m_header.m_count = htons ( static_cast <ca_uint16_t> (count) );
+    msg.m_header.m_cid = this->chan.sid;
+    msg.m_header.m_postsize = sizeof (msg.m_info);
+
+    /* msg body  */
+    p_delta = 0.0;
+    n_delta = 0.0;
+    tmo = 0.0;
+    dbr_htonf (&p_delta, &msg.m_info.m_hval);
+    dbr_htonf (&n_delta, &msg.m_info.m_lval);
+    dbr_htonf (&tmo, &msg.m_info.m_toval);
+    msg.m_info.m_mask = htons (this->mask);
+    msg.m_info.m_pad = 0; /* allow future use */    
+
+    return this->chan.piiu->pushStreamMsg (&msg.m_header, &msg.m_info, true);
+}
+
+void netSubscription::disconnect ( const char *pHostName )
+{
+}
+
+void netSubscription::completionNotify ()
+{
+    this->cacNotifyIO::completionNotify ();
+}
+
+void netSubscription::completionNotify ( unsigned type, unsigned long count, const void *pData )
+{
+    this->cacNotifyIO::completionNotify ( type, count, pData );
+}
+
+void netSubscription::exceptionNotify ( int status, const char *pContext )
+{
+    this->cacNotifyIO::exceptionNotify ( status, pContext );
+}
+
+void netSubscription::exceptionNotify ( int status, const char *pContext, unsigned type, unsigned long count )
+{
+    this->cacNotifyIO::exceptionNotify ( status, pContext, type, count );
+}