/// Start all io_service objects, default with non-bocked mode.
void start(bool blocked = false)
{
if (!threads_.empty())
return;
{
// Lock for synchronize access to data.
scoped_lock_t lock(mutex_);
blocked_ = blocked;
// Create additional io_service pool.
for (size_t i = io_services_.size(); i < pool_init_size_; ++i)
io_services_.push_back(io_service_ptr(new boost::asio::io_service));
// Release redundant io_service pool.
for (size_t i = io_services_.size(); i > pool_init_size_; --i)
io_services_.pop_back();
// The pool is still idle now, set to true.
idle_ = true;
// Start all io_service.
for (size_t i = io_services_.size(); i > 0 ; --i)
start_one(io_services_[i - 1]);
}
// If in block mode, wait for all threads to exit.
if (blocked_)
wait();
}
/// Start all io_service objects in the pool.
void start(bool block)
{
if (threads_.size() != 0)
return;
// Start all io_service.
for (std::size_t i = 0; i < io_services_.size(); ++i)
start_one(io_services_[i]);
block_ = block;
if (block)
wait();
}
/// Get an io_service to use. if need then create one to use.
boost::asio::io_service& get_io_service(std::size_t load)
{
// Calculate the required number of threads.
std::size_t threads_number = load / pool_thread_load_;
if ((threads_number > io_services_.size()) && (io_services_.size() < pool_high_watermark_) && !block_)
{
// Create new io_service and start it.
io_service_ptr io_service(new boost::asio::io_service);
io_services_.push_back(io_service);
start_one(io_service);
next_io_service_ = io_services_.size() - 1;
}
return get_io_service();
}
/// Get an io_service to use. if need then create one to use.
boost::asio::io_service& get_io_service(size_t load)
{
// Calculate the required number of threads.
size_t threads_number = load / pool_thread_load_;
// Lock for synchronize access to data.
scoped_lock_t lock(mutex_);
size_t service_count = io_services_.size();
if (!blocked_ && \
!work_.empty() && \
!threads_.empty() && \
threads_number > service_count && \
service_count < pool_high_watermark_)
{
// Create new io_service and start it.
io_service_ptr io_service(new boost::asio::io_service);
io_services_.push_back(io_service);
start_one(io_service);
next_io_service_ = service_count;
}
return get_io_service();
}
