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/* -*- c++ -*- */
/*
* Copyright 2007,2008,2009 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
* GNU Radio is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU Radio is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <mb_port_simple.h>
#include <mblock/msg_accepter.h>
#include <mblock/exception.h>
#include <mblock/mblock.h>
#include <mb_mblock_impl.h>
#include <assert.h>
#include <mbi_runtime_lock.h>
using namespace pmt;
mb_port_simple::mb_port_simple(mb_mblock *mblock,
const std::string &port_name,
const std::string &protocol_class_name,
bool conjugated,
mb_port::port_type_t port_type)
: mb_port(mblock, port_name, protocol_class_name, conjugated, port_type),
d_cache_valid(false)
{
}
mb_port_simple::~mb_port_simple()
{
// nop
}
void
mb_port_simple::send(pmt_t signal, pmt_t data, pmt_t metadata, mb_pri_t priority)
{
if (port_type() == mb_port::RELAY) // Can't send directly to a RELAY port
throw mbe_invalid_port_type(mblock(), mblock()->instance_name(), port_name());
mb_msg_accepter_sptr accepter = find_accepter(this);
if (accepter)
(*accepter)(signal, data, metadata, priority);
}
mb_msg_accepter_sptr
mb_port_simple::find_accepter(mb_port_simple *start)
{
mb_port_simple *p = start;
mb_port_simple *pp = 0;
mb_mblock *context = 0;
mb_endpoint peer_ep;
mb_msg_accepter_sptr r;
if (start->d_cache_valid)
return start->d_cached_accepter;
mbi_runtime_lock l(p->mblock());
// Set up initial context.
switch(p->port_type()){
case mb_port::INTERNAL: // binding is in our name space
context = p->mblock();
break;
case mb_port::EXTERNAL: // binding is in parent's name space
context = p->mblock()->parent();
if (!context) // can't be bound if there's no parent
return mb_msg_accepter_sptr(); // not bound
break;
default:
throw std::logic_error("Can't happen: mb_port_simple::find_accepter [1]");
}
traverse:
if (!context->impl()->lookup_other_endpoint(p, &peer_ep))
return mb_msg_accepter_sptr(); // not bound
pp = dynamic_cast<mb_port_simple *>(peer_ep.port().get()); // peer port
assert(pp);
switch (pp->port_type()){
case mb_port::INTERNAL: // Terminate here.
case mb_port::EXTERNAL:
r = pp->make_accepter();
// cache the result
start->d_cached_accepter = r;
start->d_cache_valid = true;
return r;
case mb_port::RELAY: // Traverse to other side of relay port.
if (peer_ep.inside_of_relay_port_p()){
// We're on inside of relay port, headed out.
p = pp;
context = p->mblock()->parent();
// Corner case: we're attempting to traverse a relay port on the border
// of the top block...
if (!context)
return mb_msg_accepter_sptr(); // not bound
goto traverse;
}
else {
// We're on the outside of relay port, headed in.
p = pp;
context = p->mblock();
goto traverse;
}
break;
default:
throw std::logic_error("Can't happen: mb_port_simple::find_accepter [2]");
}
}
mb_msg_accepter_sptr
mb_port_simple::make_accepter()
{
return d_mblock->impl()->make_accepter(port_symbol());
}
void
mb_port_simple::invalidate_cache()
{
d_cache_valid = false;
d_cached_accepter.reset();
}
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