Boost.Asio入門

会社の同期向け勉強会で発表した Boost.Asioの基本的な説明とか自分の気になった部分を調べたまとめ。

Transcript

1. Boost.Asio ೖ໳ @syu_cream
2. ΞδΣϯμ Boost.Asio ͷ঺հ جຊతͳಛ௃ ΠϕϯτۦಈͱBoost.Asio εϨουͱBoost.Asio ίϧʔνϯͱBoost.Asio (༨༟͕͋Ε͹)αϯϓϧίʔυಡΈ (ߋʹ༨༟͕͋Ε͹)झຯͰॻ͍͍ͯΔ HTTP/2 ؆қ࣮૷ʹ͍ͭͯ
3. Boost.Asio ͱ͸ Boost ͷඇಉظωοτϫʔΫ௨৴ϥΠϒϥϦ ΠϕϯτۦಈI/Oͷαϙʔτ ϓϥοτϑΥʔϜͷࠩҟΛٵऩͯ͘͠ΕΔ ಉظ௨৴΋αϙʔτ
4. Asio Ͱαϙʔτ͢Δ௨৴ αϙʔτ͢Δϓϩτίϧͷछྨ TCP/UDP/ICMP ιέοτ γϦΞϧϙʔτ UNIX Domain Socket
5. Πϕϯτۦಈͱ Boost.Asio
6. Πϕϯτۦಈ I/O ಉ࣌ʹෳ਺ͷ I/O Λॲཧ͢ΔϞσϧ I/Oͷ׬ྃΛݕग़͢ΔΠϕϯτϧʔϓΛ࣋ͭ I/O׬ྃ࣌ʹΠϕϯτϋϯυϥΛ࣮ߦ͢Δ ! "
   !!
   !!
   !!
   ①"I/O" ! !   " ②"I/O"" !!
   ③!! "
7. Proactor pattern ΠϕϯτۦಈI/OΛ࣮ݱ͢ΔσβΠϯύλʔϯͷҰछ Πϕϯτϧʔϓͱϋϯυϥͷ࣮૷Λ෼཭ લऀ͸OSͷػೳ(select, poll, epoll/kqueueͳͲ)Λར༻ ޙऀ͸ࣗલͰ࣮૷ɻඞཁͳΒεϨουͰฒྻॲཧɻ
8. Boost.Asio ʹ͓͚Δ Proactor io_service ΦϒδΣΫτΛհͯ͠ I/O Λॲཧ͢Δ $:@.><
   8A7>
   I/O$+91*-6$ (:$3/46)
   io_service
   +;?B5)A.025<
   ①$I/O+9 1*-6
   ② 8A7> " 
   ③io_service$(run() !(
   ④$I/O$ (
   ⑤$I/O  %  ,=B#'& io_service$'(
   ⑥I/O$( 8A7>#&$
9. io_service Boost.Asio ͷ௨৴ͷཁͱͳΔΦϒδΣΫτ Πϕϯτϧʔϓͷ࣮ߦ εϨουϓʔϧͷ؅ཧ OS ͷΠϕϯτ௨஌ػߏΛݺͼग़͠ ׬ྃϋϯυϥͷݺͼग़͠
10. io_service ͷૢ࡞ io_service::run() ΠϕϯτॲཧϧʔϓΛϒϩοΩϯά࣮ͯ͠ߦ io_service::poll() ΠϕϯτॲཧϧʔϓΛϒϩοΩϯάͤͣʹ࣮ߦ io_service::post() Ωϡʔʹॲཧ͢΂͖ϋϯυϥΛ௥Ճ io_service::dispatch() ʢՄೳͰ͋Ε͹ʣ౉ͨ͠ϋϯυϥΛଈ࠲ʹ࣮ߦ
11. Asio ʹΑΔඇಉظTCP௨৴ boost::asio::ip::tcp::socket TCPιέοτΛදݱ͢Δ I/O ΦϒδΣΫτ boost::asio::async_connect ඇಉظʹ connect ͢Δ boost::asio::ip::tcp::socket::async_accept ඇಉظʹ accept ͢Δ boost::asio::async_(read | write) ඇಉظʹ read/write ͢Δ
12. εϨουͱ Boost.Asio
13. εϨουͱͷؔ܎ εϨουϓʔϧ ׬ྃϋϯυϥͷॲཧΛ؆୯ʹϚϧνεϨουԽՄೳ io_service::run() Λෳ਺εϨου͔Βݺͼग़͢ͱε Ϩουϓʔϧ͕ߏங͞ΕΔ ಺෦εϨου ϗετ໊ղܾͳͲϥΠϒϥϦ಺ͰฒྻԽ͞ΕΔ
14. ίϧʔνϯͱ Boost.Asio
15. ׬ྃϋϯυϥͷ࣮૷1: ී௨ʹίʔϧόοΫؔ਺Λఆٛ ఆ൪ͷ׬ྃϋϯυϥͷॻ͖ํ ͨͩ͠ίʔυͷݟ௨͠͸ѱ͘ͳΔɻ
16. ׬ྃϋϯυϥͷ࣮૷2: ແ໊ؔ਺Λ࢖͏ ؔ࿈͢Δॲཧͷهड़Λू໿Ͱ͖Δ ͔͠͠ɺωετ͕ਂ͘ͳΔɻ
17. ׬ྃॲཧͱίϧʔνϯ ௨৴ॲཧ͸ஞ࣍తʹهड़ग़དྷͨํ͕௚ײత ෳ਺ճͷର࿩Λཁ͢Δϓϩτίϧ͠Ό΂Δ৔߹ͳͲ ॲཧ͕ෳࡶʹͳΔͱίʔϧόοΫ஍ࠈʹؕΔ ! Boost 1.53 ͔ΒBoost.Coroutine Λαϙʔτʂ ஞ࣍ॲཧͬΆ͘ඇಉظ௨৴ॲཧ͕هड़Ͱ͖Δ
18. ׬ྃϋϯυϥͷ࣮૷3: ελοΫϨείϧʔνϯ Boost.Coroutine Λ࢖ͬͯஞ࣍ॲཧతʹهड़ reenter() ʹίϧʔνϯͰ࣮ߦ͢ΔॲཧΛهड़ I/O ͢Δࡍ͸ yield ͰίϯςΩετΛ”ৡΔ” reenter() ֎ʢؔ਺ݺͼग़͠ઌͳͲʣͰ͸ yield Ͱ͖ͳ͍͜ͱʹ஫ҙ
19. ׬ྃϋϯυϥͷ࣮૷4: ελοΫϑϧίϧʔνϯ boost::asio::spawn() ʹίϧʔνϯΛ౉͚ͩ͢ Boost.Coroutine ͷهड़Λҙࣝ͠ͳͯ͘ྑ͘ͳΔ ελοΫϨείϧʔνϯͱҧ͍ɺݺͼग़͠ઌͷؔ਺಺Ͱ yield Մೳ yield_context Λ఻ൖ͢Δඞཁ͸͋Δ
20. ·ͱΊ Boost.Asio ͸ඇಉظ I/O ॲཧͷهड़ʹศར ΠϕϯτۦಈɺϓϥοτϑΥʔϜඇґଘͷ هड़ΛӅṭՄೳ ඇಉظॲཧͷهड़΋ൺֱత༰қ