1 #ifndef OSMIUM_THREAD_POOL_HPP 2 #define OSMIUM_THREAD_POOL_HPP 44 #include <type_traits> 59 constexpr
const int max_pool_threads = 32;
61 inline int get_pool_size(
int num_threads,
int user_setting,
unsigned hardware_concurrency) {
62 if (num_threads == 0) {
63 num_threads = user_setting ? user_setting : -2;
66 if (num_threads < 0) {
67 num_threads += int(hardware_concurrency);
70 if (num_threads < 1) {
72 }
else if (num_threads > max_pool_threads) {
73 num_threads = max_pool_threads;
79 inline std::size_t get_work_queue_size() noexcept {
113 if (thread.joinable()) {
131 if (task && task()) {
160 m_work_queue(max_queue_size > 0 ? max_queue_size :
detail::get_work_queue_size(),
"work"),
208 template <
typename TFunction>
209 std::future<
typename std::result_of<TFunction()>
::type>
submit(TFunction&& func) {
210 using result_type =
typename std::result_of<TFunction()>
::type;
212 std::packaged_task<result_type()> task{std::forward<TFunction>(func)};
213 std::future<result_type> future_result{task.get_future()};
216 return future_result;
225 #endif // OSMIUM_THREAD_POOL_HPP type
Definition: entity_bits.hpp:63
Pool & operator=(const Pool &)=delete
std::size_t get_max_queue_size(const char *queue_name, std::size_t default_value) noexcept
Definition: config.hpp:83
static Pool & default_instance()
Definition: pool.hpp:174
bool queue_empty() const
Definition: pool.hpp:204
void set_thread_name(const char *name) noexcept
Definition: util.hpp:76
~Pool()
Definition: pool.hpp:192
Definition: location.hpp:550
std::size_t queue_size() const
Definition: pool.hpp:200
std::vector< std::thread > & m_threads
Definition: pool.hpp:97
std::future< typename std::result_of< TFunction()>::type > submit(TFunction &&func)
Definition: pool.hpp:209
static constexpr int default_num_threads
Definition: pool.hpp:141
void worker_thread()
Definition: pool.hpp:126
int get_pool_threads() noexcept
Definition: config.hpp:62
int num_threads() const noexcept
Definition: pool.hpp:196
Namespace for everything in the Osmium library.
Definition: assembler.hpp:53
static constexpr int default_queue_size
Definition: pool.hpp:142
Definition: function_wrapper.hpp:48
std::vector< std::thread > m_threads
Definition: pool.hpp:122
osmium::thread::Queue< function_wrapper > m_work_queue
Definition: pool.hpp:121
thread_joiner(std::vector< std::thread > &threads)
Definition: pool.hpp:101
int m_num_threads
Definition: pool.hpp:124
~thread_joiner()
Definition: pool.hpp:111
thread_joiner & operator=(const thread_joiner &)=delete
void shutdown_all_workers()
Definition: pool.hpp:179
thread_joiner m_joiner
Definition: pool.hpp:123
Pool(int num_threads=default_num_threads, std::size_t max_queue_size=default_queue_size)
Definition: pool.hpp:159