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όΠτϧΞϓϦ΁ͷSwift Concurrency ಋೖͱͦͷޮՌ Eiji Shirakazu, iOS Engineer in dip

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ࣗݾ঺հ ന਺ ӥ࢘ / Eiji Shirakazu @cychow_app όΠτϧ iOSΞϓϦ։ൃ୲౰ ࠷ۙ͸Vision Pro (visionOS)ͷγϛϡϨʔλͰ༡ΜͰ͍·͢ʂ

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ຊ೔ͷ಺༰ όΠτϧΞϓϦͷ͝঺հͱ։ൃपΓͷ͓࿩ ͦ΋ͦ΋Swift Concurrencyͱ͸ Swift ConcurrencyΛͲͷΑ͏ʹಋೖ͔ͨ͠ Swift Concurrencyಋೖޙͷঢ়گ

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όΠτϧΞϓϦͱ͸… ɾΞϧόΠτ/ύʔτٻਓݕࡧαʔϏε ɾ෯޿͍෼໺͔༷ͭʑͳ৚݅ͷΞϧόΠτ/ύʔτ৘ใɹ ɹΛ਺ଟ͘ܝࡌʂ ɾࣸਅ΍ಈըͳͲ͔ΒΞϧόΠτ/ύʔτઌͷ੍෰΍ಇ͍ͯ ɹ͍Δελοϑɺ৬৔ͷงғؾͳͲΛ֬ೝ͢Δ͜ͱ͕Ͱ͖Δʂ

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ʮॳճΠϯετʔϧޙͷମݧ޲্ʯػೳʹ͍ͭͯ εϓϥογϡ ٻਓͷҰཡ

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ʮॳճΠϯετʔϧޙͷମݧ޲্ʯػೳʹ͍ͭͯ εϓϥογϡ Ϣʔβʔ΁ͷ࣭໰

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ʮॳճΠϯετʔϧޙͷମݧ޲্ʯػೳͷ։ൃͰ Swift ConcurrencyΛಋೖʂʂ

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Swift Concurrencyͱ͸ WWDC21ʹͯొ৔ͨ͠৽ͨͳฒߦॲཧͷख๏ async/awaitΩʔϫʔυΛ༻͍Δ͜ͱͰඇಉظॲཧ / ฒߦॲཧΛ࣮ݱ͢Δ async/awaitҎ֎ʹ΋Actor΍TaskɺAsyncStreamͳͲͷ֓೦΋ొ৔

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Swift ConcurrencyΛͲͷΑ͏ʹಋೖ͔ͨ͠ ᶃ ·ͣ͸ࣗ਎͕ੵۃతʹConcurrencyʹ͍ͭͯΠϯϓοτͨ͠ ᶄ ಋೖ͢Δ͜ͱʹͲΕ͘Β͍ͷϝϦοτ͕͋Δ͔Λߟ࡯ͨ͠

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ɾඇಉظॲཧΛಉظॲཧͷΑ͏ʹදه͢Δ͜ͱͰ࣮ߦॱংΛ௥͍΍͍͢ Swift ConcurrencyΛಋೖ͢ΔϝϦοτ ɾσʔλڝ߹Λճආ͠΍͘͢ͳΔ ɾiOS13Ҏ߱Ͱ࢖༻͢Δ͜ͱ͕Ͱ͖Δ ɾΤϥʔϋϯυϦϯάΛߦ͍΍͘͢ͳΔ ͳͲ…

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Swift ConcurrencyΛͲͷΑ͏ʹಋೖ͔ͨ͠ ᶅ ઌഐΤϯδχΞͷํʑͱ૬ஊ͠ɺαʔϏεʹ༩͑ΔӨڹΛߟ্ྀͨ͠Ͱಋೖ ɹ͍ͯ͘͜͠ͱʹͨ͠ ᶃ ·ͣ͸ࣗ਎͕ੵۃతʹConcurrencyʹ͍ͭͯΠϯϓοτͨ͠ ᶄ ಋೖ͢Δ͜ͱʹͲΕ͘Β͍ͷϝϦοτ͕͋Δ͔Λߟ࡯ͨ͠ ᶆ Өڹൣғ͕খ͍͞ʮॳճΠϯετʔϧޙͷମݧʯΛ޲্ͤ͞ΔϓϩδΣΫτ ɹʹͯಋೖ͢Δ͜ͱͱͨ͠

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ɾcompletionHandlerΛ༻͍ͣɺasync/awaitΛ༻͍ͯදه͢Δɻ ɾGCDΛ࢖༻͢ΔՕॴΛTaskʹஔ͖׵͑Δɻ ɾMainActorΛࢦఆ͢ΔՕॴʹ஫ҙ͢Δɻ Swift ConcurrencyΛಋೖ࣌ͷϙΠϯτ ɾwithCheckedContinuation΍withCheckedThrowingContinuationͰ ɹطଘͷඇಉظॲཧΛasync/awaitʹରԠͤ͞Δ͜ͱ͕Ͱ͖Δɻ ͳͲ

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ͨͩɺ໰୊఺΋…

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௚໘ͨ͠໰୊఺ ଞͷ։ൃνʔϜϝϯόʔ΍৽نࢀըऀͷํʹରͯ͠Concurrencyͷ ॻ͖ํͳͲΛ஌ͬͯ΋Β͏ඞཁ͕͋ͬͨɻ

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໰୊఺ͷղܾࡦ LTେձ΁ࢀՃ

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Swift Concurrencyಋೖޙͷঢ়گ ɾιʔείʔυͷՄಡੑ͕޲্ͨ͠ ɾνʔϜϝϯόʔ͕ੵۃతʹΩϟονΞοϓ͢ΔΑ͏ʹͳͬͨ ʲݱঢ়ʳ ɾαʔυύʔςΟ੡ϥΠϒϥϦ͔Βඪ४ϥΠϒϥϦʹҠߦ͢Δ͜ͱ͕Ͱ͖͍ͯΔ

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Swift Concurrencyಋೖޙͷঢ়گ ɾSwift6΁ͷϝδϟʔΞοϓσʔτͷ४උ ʲࠓޙͷ՝୊ʳ

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Swift Concurrencyಋೖޙͷঢ়گ ɾࠓޙͷSwift6΁ͷϝδϟʔΞοϓσʔτͷ४උ ɾίϯύΠϥϑϥάʮStrict Concurrency CheckingʯͷಋೖͳͲ΋ݕ౼ ʲࠓޙʳ

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ίϯύΠϥϑϥάʮStrict Concurrency Checkingʯ

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ίϯύΠϥϑϥάʮExistentialAnyʯ΋ಋೖݕ౼த….

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Swift Concurrencyಋೖޙͷঢ়گ ɾࠓޙͷSwift6΁ͷϝδϟʔΞοϓσʔτͷ४උ ɾίϯύΠϥϑϥάʮStrict Concurrency CheckingʯͷಋೖͳͲ΋ݕ౼ ɾSendable΁ͷ४ڌͷνΣοΫͳͲ΋͓͜ͳ͍͖͍ͬͯͨ ʲࠓޙʳ

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όΠτϧͰ͸Ҿ͖ଓ͖ٕज़త௅ઓΛଓ͚͍͖ͯ·͢ʂ

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