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[draft] 同期と非同期
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seki at druby.org
October 25, 2012
Programming
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500
[draft] 同期と非同期
札幌Ruby会議でリジェクトされたネタの半分。
seki at druby.org
October 25, 2012
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Transcript
ಉظͱඇಉظ ඇಉظϓϩάϥϛϯάͱಉظͷϓϩάϥϛϯάͰ͋Δ
[email protected]
ྃ෮ؼͱଈ࣌෮ؼ ྃ෮ؼ ओͰ͋Δॲཧ͕ऴΘͬͨΒॲཧ͕Δ ଈ࣌෮ؼ ओͰ͋ΔॲཧΛ࢝ΊͨΒॲཧ͕Δ
ଈ࣌෮ؼΛ͏ͱ͖ Γͬͺͳ͠Ͱͳ͍ ݁Ռʹڵຯ͕͋Δ ඇಉظͷϓϩάϥϛϯάͱಉظΛϓϩάϥ ϛϯά͢Δ͜ͱ
݁Ռͱͷ͖͍ͭ͋ύλʔϯ ͕ࣗՋʹͳͬͨΒɺґཔͨ͠ॲཧΛͭ ͨ͘͞ΜͷґཔΛͭ ॲཧ͕ऴΘͬͨΒ௨ΛΒ͏←᠘͕͋Δʂ
ՋʹͳͬͨΒճऩ͢Δ ॲཧΛґཔ νέοτ͕ฦΔ ฒߦͯࣗ͠ͷࣄΛ͢Δ ࣗͷࣄ͕ऴΘͬͨΒɺґཔͷऴྃΛͭ νέοτΛͬͯͭ
νέοτͷྫ ιέοτͦͷͷ͕νέοτ ґཔΛॻ͖ɺ݁ՌΛಡΉ popenͳͲࣅͨΑ͏ͳͷ ticket = TCPClient.new(...) ticket.write('your task') my_important_task
ticket.read
νέοτͷྫ εϨουνέοτͷΑ͏ʹ͑Δ joinͰ߹ͤͱͷऔಘ͕ҰʹͰ͖ΔΑ ticket = Thread.new { your_task } my_important_task
ticket.join
νέοτͷྫ λϓϧεϖʔεͳΒλϓϧ ticket = Object.new tuple_space.write([:your_task, ticket]) my_important_task tuple_space.take([:your_task_done, ticket])
νέοτͷྫ ֎෦αʔϏεʹॲཧΛґཔ͍ͯ͠߹Θͤν έοτΛΒ͏ͷΑ͋͘Δ ࠷ॳͷ͍߹Θͤྃ෮ؼ͔ͳ ಉظͷ߹ͤʹΑΔඇಉظ ticket = DeluxService.create_task('your task') my_important_task
DeluxService.wait(ticket)
ͨ͘͞Μґཔͯ͠࠷ޙʹͭ ͨ͘͞Μґཔɺͨ͘͞Μճऩ ͻͱͭͷͱ͖ͱຊ࣭తʹมΘΒͳ͍
ͨ͘͞Μґཔͯ͠࠷ޙʹͭ n.times ॲཧΛґཔ νέοτ͕ฦΔ ฒߦͯࣗ͠ͷࣄΛ͢Δ ࣗͷࣄ͕ऴΘͬͨΒɺґཔͷऴྃΛͭ n.times νέοτΛͬͯͭ
ͨ͘͞Μͷॲཧͱࣗͷॲཧ Λฒߦͯ͠܁Γฦ͢ ௨৴ΛؚΉGUIϓϩάϥϛϯάͱ͔ ϞμϯͳΞϓϦέʔγϣϯͰΑ͋͘Δ αʔόαΠυͰଟ͍
ಉ࣌ʹ͍͍ͭͪͨ͘ ͨ͘͞ΜͷνέοτΛͭ ιέοτͳΒselect()ଐ ͳʹ͔ى͖ͨΒԠ͢Δ Δ͜ͱͳ͘ͳͬͨΒνέοτΛͭ
selectଐϝΠϯϧʔϓ select(ͨ͘͞Μͷιέοτ) Ԡ͕͋Γͦ͏ͳιέοτͷಡΈॻ͖ ͳʹ͔ॲཧΛ͢Δ
ίʔϧόοΫͷύλʔϯ select(ͨ͘͞Μͷιέοτ) Ԡ͕͋Γͦ͏ͳιέοτͷಡΈॻ͖ ͳʹ͔ॲཧΛ͢Δ ϑϨʔϜϫʔΫ͕Ӆ͢ ͜ͷลίʔϧόοΫ
ͦͷଞͷଟݩͪ TupleSpaceɺQueueͳͲͷಉظϝΧχζϜͷ ར༻
ॲཧ͕ऴΘͬͨΒ௨ͷ᠘ ͳʹ͔ͯ͠Δ͔ΒɺऴΘͬͨΒڭ͑ͯ͘Ε ͏ΜɻͰɺͲ͏ͬͯʁ
εϨουडಈతʹ௨Λड ͚ΔͷΊΜͲ͏ ࣗͷॲཧΛׂΓࠐΜͰڭ͑ͯΒͬͯ ԠͰ͖ͳ͍ ͕ࣗड͚ೖΕΒΕΔঢ়گ·ͰΓͨ͘ͳ͍ ͨͱ͑γάφϧͰ௨͞Εͯ௨͕͋ͬ ͨ͜ͱΛϝϞͯ҆͠શͳ࣌·ͰԠΒͤΔ ݁ہʮಉ࣌ʹ͍͍ͭͪͨ͘ʯύλʔϯʹ ͳΔ
ΞΫλʔϞσϧ ࣗͷ߹͚ͩͰಈ͘ੈք ͨͩ͠ɺੈքṖͷΤʔςϧͰຬͨ͞Ε͍ͯΔ ͖ͳͱ͖ʹࣗѼͷϝοηʔδΛಡΉ ͖ͳͱ͖ʹͩΕ͔ʹϝοηʔδΛॻ͘ ͩΕ͔ͦͷॠؒଘࡏ͠ͳ͍͜ͱ͋Δ ࣗεϨουϓϩάϥϛϯάͷ͔͠͞Β ղ์͞ΕΔʢ͔ͷΑ͏ʹݟ͑Δʣ
ૈ͘ݴ͏ͱ લड़ͷϝΠϯϧʔϓΛΓ։͍ͨΑ͏ͳײ͡ ʹͳΔ͔ ͋Δ͍ಉ͡Α͏ͳܗʹͳΔ
Τʔςϧ ϝοηʔδͷഔհ ΞΫλʔେͬ͟ͺʹଈ࣌෮ؼ ϝοηʔδͷૹ৴Τʔςϧͱͷྃ෮ؼ ड৴Τʔςϧͱಉظͯ͠Δ
݁ہͷͱ͜Ζ ଈ࣌෮ؼΛ࣮ݱ͢Δͷෳͷྃ෮ؼ ྃ෮ؼ͕ͷ͔࣌ؒ͘͢͝͠Εͳ ͍͚Ͳ ඇಉظϓϩάϥϛϯάͱ͍͔ʹಉظ͢Δ͔ ͷϓϩάϥϛϯάͰ͋Δ
RubyͰඇಉظʹॲཧΛґཔ͠ ͍ͨͱ͖Ͳ͏͠Α͏ εϨουʹཔΔ ͍қ͍εϨου ͔͍͍ͬ͜ಉظϝΧχζϜ ֎෦αʔϏεʹґཔ͢Δ ࣮࣭తʹෳճͷಉظ௨৴ͱͳΔ sendࢭ·Δ͠Ͷ
dRubyͷݴ͍༁ Rubyͱಉ͡ RMIΛεϨουͰแΉ ෳͷRMIͰඇಉظ෩ʹॻ͘
Rubyʹඇಉظݺͼग़͕͠ͳ͍ ͷʹࠔΒͳ͍ͷ͓͔͍͠ ଞͷํ๏ͰͰ͖ͯͨͶ RubyʹඇಉظαʔϏεΛՃ͢ΔϥΠϒϥ Ϧ͕࡞ΕΔͷ͔ͩΒͳ͍Μ͡ΌͶʁ
ͳͥdRubyʹඇಉظݺͼग़͠ ͕ͳ͍ͷ͔ ؆୯ɻRubyʹඇಉظݺͼग़͕͠ͳ͍͔Βɻ dRubyRubyͦͬ͘ΓͷRMIͰ͋Δ RubyͰࠔΔ͜ͱࠔΓɺࠔΒͳ͍͜ͱ ࠔΒͳ͍ͷΛࢦ͍ͯ͠Δ