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//
// Copyright 2012 Josh Blum
//
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Lesser General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
//
// This program 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 Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
#include "element_impl.hpp"
#include <gras/top_block.hpp>
#include <boost/thread/thread.hpp> //sleep
using namespace gras;
GlobalBlockConfig::GlobalBlockConfig(void)
{
maximum_output_items = 0;
buffer_affinity = -1;
}
TopBlock::TopBlock(void)
{
//NOP
}
TopBlock::TopBlock(const std::string &name):
HierBlock(name)
{
(*this)->executor = boost::shared_ptr<Apology::Executor>(new Apology::Executor((*this)->topology.get()));
(*this)->token = Token::make();
(*this)->thread_group = SharedThreadGroup(new boost::thread_group());
if (GENESIS) std::cerr
<< "===================================================\n"
<< "== Top Block Created: " << name << "\n"
<< "===================================================\n"
<< std::flush;
}
void ElementImpl::top_block_cleanup(void)
{
this->executor->post_all(TopInertMessage());
this->topology->clear_all();
this->executor->commit();
if (ARMAGEDDON) std::cerr
<< "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\n"
<< "xx Top Block Destroyed: " << name << "\n"
<< "xxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxxx\n"
<< std::flush;
}
GlobalBlockConfig TopBlock::global_config(void) const
{
return (*this)->top_config;
}
void TopBlock::set_global_config(const GlobalBlockConfig &config)
{
(*this)->top_config = config;
}
void TopBlock::commit(void)
{
this->start(); //ok to re-start, means update
}
void TopBlock::start(void)
{
(*this)->executor->commit();
{
(*this)->executor->post_all((*this)->thread_group);
}
{
TopTokenMessage message;
message.token = (*this)->token;
(*this)->executor->post_all(message);
}
{
//send the global block config before alloc
(*this)->executor->post_all((*this)->top_config);
}
{
(*this)->executor->post_all(TopAllocMessage());
}
{
(*this)->executor->post_all(TopActiveMessage());
}
}
void TopBlock::stop(void)
{
//interrupt these "special" threads
(*this)->thread_group->interrupt_all();
//message all blocks to mark done
(*this)->executor->post_all(TopInertMessage());
}
void TopBlock::run(void)
{
this->start();
this->wait();
this->disconnect_all();
}
GRAS_FORCE_INLINE void wait_thread_yield(void)
{
//boost::this_thread::yield();
boost::this_thread::sleep(boost::posix_time::milliseconds(1));
}
void TopBlock::wait(void)
{
//We do not need to join "special" threads;
//the token mechainism will do just fine.
//FIXME it might be nice to uncomment this for some nice quiet wait(),
//however, thread group cant be joined twice and this breaks some qa code
//(*this)->thread_group->join_all();
//wait for all blocks to release the token
while (not (*this)->token.unique())
{
wait_thread_yield();
}
}
bool TopBlock::wait(const double timeout)
{
const boost::system_time exit_time = boost::get_system_time() +
boost::posix_time::microseconds(long(timeout*1e6));
//wait for all blocks to release the token
while (not (*this)->token.unique() or boost::get_system_time() < exit_time)
{
wait_thread_yield();
}
return (*this)->token.unique();
}
///////////////////////// Deprecated interfaces ////////////////////////
void TopBlock::start(const size_t max_items)
{
this->set_max_noutput_items(max_items);
this->start();
}
void TopBlock::run(const size_t max_items)
{
this->set_max_noutput_items(max_items);
this->run();
}
int TopBlock::max_noutput_items(void) const
{
return this->global_config().maximum_output_items;
}
void TopBlock::set_max_noutput_items(int max_items)
{
gras::GlobalBlockConfig config = this->global_config();
config.maximum_output_items = max_items;
this->set_global_config(config);
}
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