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/* -*- c++ -*- */
/*
* Copyright 2008,2009,2011,2013 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 "tpb_thread_body.h"
#include <gnuradio/prefs.h>
#include <boost/thread.hpp>
#include <boost/foreach.hpp>
#include <pmt/pmt.h>
#include <iostream>
namespace gr {
tpb_thread_body::tpb_thread_body(block_sptr block, int max_noutput_items)
: d_exec(block, max_noutput_items)
{
//std::cerr << "tpb_thread_body: " << block << std::endl;
block_detail *d = block->detail().get();
block_executor::state s;
pmt::pmt_t msg;
d->threaded = true;
d->thread = gr::thread::get_current_thread_id();
prefs *p = prefs::singleton();
size_t max_nmsgs = static_cast<size_t>(p->get_long("DEFAULT", "max_messages", 100));
// Set thread affinity if it was set before fg was started.
if(block->processor_affinity().size() > 0) {
gr::thread::thread_bind_to_processor(d->thread, block->processor_affinity());
}
// Set thread priority if it was set before fg was started
if(block->thread_priority() > 0) {
gr::thread::set_thread_priority(d->thread, block->thread_priority());
}
while(1) {
boost::this_thread::interruption_point();
// handle any queued up messages
//BOOST_FOREACH( pmt::pmt_t port, block->msg_queue.keys() )
BOOST_FOREACH(basic_block::msg_queue_map_t::value_type &i, block->msg_queue) {
// Check if we have a message handler attached before getting
// any messages. This is mostly a protection for the unknown
// startup sequence of the threads.
if(block->has_msg_handler(i.first)) {
while((msg = block->delete_head_nowait(i.first))) {
block->dispatch_msg(i.first,msg);
}
}
else {
// If we don't have a handler but are building up messages,
// prune the queue from the front to keep memory in check.
if(block->nmsgs(i.first) > max_nmsgs)
msg = block->delete_head_nowait(i.first);
}
}
d->d_tpb.clear_changed();
// run one iteration if we are a connected stream block
if(d->noutputs() >0 || d->ninputs()>0){
s = d_exec.run_one_iteration();
}
else {
s = block_executor::BLKD_IN;
}
switch(s){
case block_executor::READY: // Tell neighbors we made progress.
d->d_tpb.notify_neighbors(d);
break;
case block_executor::READY_NO_OUTPUT: // Notify upstream only
d->d_tpb.notify_upstream(d);
break;
case block_executor::DONE: // Game over.
d->d_tpb.notify_neighbors(d);
return;
case block_executor::BLKD_IN: // Wait for input.
{
gr::thread::scoped_lock guard(d->d_tpb.mutex);
while(!d->d_tpb.input_changed) {
// wait for input or message
while(!d->d_tpb.input_changed && block->empty_p())
d->d_tpb.input_cond.wait(guard);
// handle all pending messages
BOOST_FOREACH(basic_block::msg_queue_map_t::value_type &i, block->msg_queue) {
while((msg = block->delete_head_nowait(i.first))) {
guard.unlock(); // release lock while processing msg
block->dispatch_msg(i.first, msg);
guard.lock();
}
}
}
}
break;
case block_executor::BLKD_OUT: // Wait for output buffer space.
{
gr::thread::scoped_lock guard(d->d_tpb.mutex);
while(!d->d_tpb.output_changed) {
// wait for output room or message
while(!d->d_tpb.output_changed && block->empty_p())
d->d_tpb.output_cond.wait(guard);
// handle all pending messages
BOOST_FOREACH(basic_block::msg_queue_map_t::value_type &i, block->msg_queue) {
while((msg = block->delete_head_nowait(i.first))) {
guard.unlock(); // release lock while processing msg
block->dispatch_msg(i.first,msg);
guard.lock();
}
}
}
}
break;
default:
assert(0);
}
}
}
tpb_thread_body::~tpb_thread_body()
{
}
} /* namespace gr */
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