io_service_pool::io_service_pool(std::size_t pool_size,
char const* pool_name, char const* name_postfix)
: next_io_service_(0), stopped_(false),
pool_size_(pool_size),
on_start_thread_(),
on_stop_thread_(),
pool_name_(pool_name), pool_name_postfix_(name_postfix),
waiting_(false), wait_barrier_(pool_size + 1),
continue_barrier_(pool_size + 1)
{
LPROGRESS_ << pool_name;
if (pool_size == 0)
{
HPX_THROW_EXCEPTION(bad_parameter,
"io_service_pool::io_service_pool",
"io_service_pool size is 0");
return;
}
// Give all the io_services work to do so that their run() functions
// will not exit until they are explicitly stopped.
for (std::size_t i = 0; i < pool_size; ++i)
{
io_services_.emplace_back(new boost::asio::io_service);
work_.emplace_back(initialize_work(*io_services_[i]));
}
}
bool io_service_pool::run_locked(std::size_t num_threads, bool join_threads,
compat::barrier* startup)
{
if (io_services_.empty())
{
pool_size_ = num_threads;
for (std::size_t i = 0; i < num_threads; ++i)
{
io_services_.emplace_back(new boost::asio::io_service);
work_.emplace_back(initialize_work(*io_services_[i]));
}
}
for (std::size_t i = 0; i < num_threads; ++i)
{
compat::thread t(
&io_service_pool::thread_run, this, i, startup);
threads_.emplace_back(std::move(t));
}
next_io_service_ = 0;
stopped_ = false;
HPX_ASSERT(pool_size_ == io_services_.size());
HPX_ASSERT(threads_.size() == io_services_.size());
HPX_ASSERT(work_.size() == io_services_.size());
if (join_threads)
join_locked();
return true;
}
void io_service_pool::wait_locked()
{
if (!stopped_) {
// Clear work so that the run functions return when all work is done
waiting_ = true;
work_.clear();
wait_barrier_.wait();
// Add back the work guard and restart the services
waiting_ = false;
for (std::size_t i = 0; i < pool_size_; ++i)
{
work_.emplace_back(initialize_work(*io_services_[i]));
io_services_[i]->reset();
}
continue_barrier_.wait();
}
}
void PSYoungGen::initialize(ReservedSpace rs, size_t alignment) {
initialize_virtual_space(rs, alignment);
initialize_work();
}
// Redundant initializations okay.
void initialize() {
// Double-check dirty read idiom.
if (!_initialized) initialize_work();
}