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// Copyright (C) by Josh Blum. See LICENSE.txt for licensing information.
#include "element_impl.hpp"
#include <gras/top_block.hpp>
#include <boost/thread/thread.hpp> //sleep
using namespace gras;
TopBlock::TopBlock(void)
{
//NOP
}
TopBlock::TopBlock(const std::string &name):
HierBlock(name)
{
(*this)->executor.reset(new Apology::Executor((*this)->topology.get()));
(*this)->token = Token::make();
(*this)->thread_group = SharedThreadGroup(new boost::thread_group());
}
TopBlock::~TopBlock(void)
{
//NOP
}
void ElementImpl::top_block_cleanup(void)
{
this->bcast_prio_msg(TopInertMessage());
this->topology->clear_all();
this->executor->commit();
}
const GlobalBlockConfig &TopBlock::global_config(void) const
{
return (*this)->top_config;
}
GlobalBlockConfig &TopBlock::global_config(void)
{
return (*this)->top_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)->bcast_prio_msg(TopInertMessage());
}
void TopBlock::run(void)
{
this->start();
this->wait();
}
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();
}
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