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echoサーバーを書いてI/Oと仲良くなる話
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kariyayo
April 07, 2017
Programming
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echoサーバーを書いてI/Oと仲良くなる話
kariyayo
April 07, 2017
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Transcript
FDIPαʔόʔΛॻ͍ͯ *0ͱྑ͘ͳΔ 2017/3/25 Yokohama North Meetup ˌ5 #yokohama_north bati (@bati11_)
*0ͷ
*0ͷ • งғؾ͔͠௫Ίͯͳͯͪ͘ΌΜͱ͔ͬͯͳ͔ͬͨ • άάΔͱ৭ʑग़ͯ͘Δ • ৭ʑग़ͯ͘Δ͚Ͳɺେମ6/*9ωοτϫʔΫϓϩάϥϛϯάΛ ࢀরͯ͠Δ • IUUQTXXXBNB[PODPKQ6/*9ωοτϫʔΫϓϩάϥϛϯά7PMωοτϫʔ
Ϋ"1*ιέοτͱ95*8ϦνϟʔυεςΟʔϰϯεEQ • ಡΜͰΈͨ • ϒϩάʹ·ͱΊͨ • IUUQCBUJCMPHIBUFOBCMPHDPNFOUSZ
*0ͷ • ͭͷ*0Ϟσϧ • ϒϩοΩϯά*0 • ϊϯϒϩοΩϯά*0 • *0ଟॏ •
γάφϧۦಈ*0 • ඇಉظ*0
*0ͷ • ͭͷ*0Ϟσϧ • ϒϩοΩϯά*0 • ϊϯϒϩοΩϯά*0 • *0ଟॏ •
γάφϧۦಈ*0 • ඇಉظ*0 今回は話しない
*0ͷ • σʔλಡΈࠐΈ࣌ͷ*0ɺͭͷεςοϓ͔ΒΔ • σʔλΛͭ • Χʔωϧ͔ΒϢʔβʔϓϩάϥϜσʔλΛίϐʔ ͢Δ
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ
• ಉظ*0ૢ࡞ͱඇಉظ*0ૢ࡞ͷ *0ͷ ಉظI/Oૢ࡞Ͱɺ͜ΕΛཁٻͨ͠ϓϩηε ཁٻͨ͠I/Oૢ࡞͕ྃ͢Δ·ͰϒϩοΫ͢Δ ඇಉظI/Oૢ࡞Ͱɺ͜ΕΛཁٻͨ͠ϓϩηε ϒϩοΫ͠ͳ͍ UNIXωοτϫʔΩϯάϓϩάϥϛϯά ୈ2൛ Vol.1
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ 同期I/O操作
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ 非同期I/O操作
FDIPαʔόʔ
FDIPαʔόʔ • ΫϥΠΞϯτ͔ΒೖྗΛड͚͚ͯɺͦͷ··ฦ͢ αʔόʔ • ίʔυIUUQTHJUIVCDPNCBUJPSFOPFDIPTFSWFSCMPCNBTUFSTSD TJOHMF@FDIP@TFSWFSD • σϞ
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ
FDIPαʔόʔ • SFBEͰϒϩοΫͯ͠Δ • ҎԼͷͭͷํ๏Ͱରࡦͯ͠ΈΔ • ϒϩοΩϯά*0ͷ··Ϛϧνϓϩηεʹ͢Δ • ϊϯϒϩοΩϯά*0Λ͏ •
*0ଟॏΛ͏
ϒϩοΩϯά*0ͷ·· Ϛϧνϓϩηεʹ͢Δ
ϒϩοΩϯά*0ͷ··Ϛϧνϓϩηεʹ͢Δ • GPSLΛͬͯϚϧνϓϩηεʢϚϧνεϨουͰ ͍͍͚Ͳ$ݴޠͰϚϧνεϨου͔Βͳ͍ʣ • αʔόʔͷϓϩηεͭͰɺͭͷΫϥΠΞϯτʹ ରԠ͢Δ • ίʔυIUUQTHJUIVCDPNCBUJPSFOPFDIPTFSWFSCMPCNBTUFSTSD GPSL@FDIP@TFSWFSD
• σϞ
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ
ϊϯϒϩοΩϯά*0Λ͏
ϊϯϒϩοΩϯά*0Λ͏ • ιέοτΛϊϯϒϩοΩϯάʹ͓ͯ͘͠ • σʔλಡΈࠐΈ࣌ʹɺσʔλ͕౸ୡ͍ͯ͠ͳ͍߹ϒ ϩοΫͤͣʹ͙͢ʹΤϥʔ͕ฦͬͯ͘Δ • αʔόʔͷϓϩηεͭͰɺෳͷΫϥΠΞϯτʹରԠ ͢Δ •
ίʔυIUUQTHJUIVCDPNCBUJPSFOPFDIPTFSWFSCMPCNBTUFSTSD OPO@CMPDLJOH@FDIP@TFSWFSD • σϞ
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ
ϊϯϒϩοΩϯά*0Λ͏ • ιέοτΛཧ͢Δͷਏ͍ • ϒϩοΫ͠ͳ͍ͷͰɺσʔλΛͬͯΔ͚ͩͳͷʹ ϓϩάϥϜ͕ϧʔϓ͠ଓ͚ͯ͠·͍$16͕ແବʹͳ Δ • ϓϩηεͰಈ͍͍ͯΔͷͰɺଞͷ*0ͳͲͰϒϩο Ϋ͠ͳ͍Α͏ʹ͠ͳ͍͚ͯ͘ͳ͍
*0ଟॏΛ͏
*0ଟॏΛ͏ • ෳͷιέοτʹରͯ͠σʔλΛͭ • σʔλͷ౸ୡ͕͋ͬͨΒΧʔωϧ͔Βͷ௨Λड͚औΓɺ ͦͷޙσʔλͷಡΈऔΓΛߦ͏ • αʔόʔͷϓϩηεͭͰɺෳͷΫϥΠΞϯτʹରԠ ͢Δ •
ίʔυIUUQTHJUIVCDPNCBUJPSFOPFDIPTFSWFSCMPCNBTUFSTSD FQPMM@FDIP@TFSWFSD • σϞ
σʔλͪ Χʔωϧ͔Β Ϣʔβʔ σʔλΛίϐʔ ىಈ ௨ ىಈ ྃ ϒϩοΫ ݕࠪ
४උྃ ىಈ ྃ ϒϩοΫ ϒϩοΫ ϒϩοΩϯά *0 ϊϯ ϒϩοΩϯά *0 *0ଟॏ ඇಉظ*0 ݕࠪ ྃ ݕࠪ ݕࠪ ݕࠪ ϒϩοΫ ݕࠪ
*0ଟॏΛ͏ • *0ଟॏͷγεςϜίʔϧFQPMMҎ֎ʹز͔ͭ͋ ΔʢTFMFDUQPMMͳͲʣ • FQPMM-JOVYґଘɻϓϥοτϑΥʔϜґଘΛٵऩ͠ ͨϥΠϒϥϦͱͯ͠MJCFW͕͋Δ
*0ଟॏΛ͏ • ϓϩηεͰಈ͍͍ͯΔͷͰɺଞͷ*0ͳͲͰϒϩο Ϋ͠ͳ͍Α͏ʹ͠ͳ͍͚ͯ͘ͳ͍ • FQPMM͔Β௨͕དྷͯಡΈࠐΈͰϒϩοΫ͢Δ Մೳੑ͋Γ • ॻ͖ࠐΈ࣌ͷϒϩοΫ •
ϑΝΠϧಡΈࠐΈଞͷ௨৴ʹΑΔϒϩοΫ
ੈͷதͷαʔόʔ
ੈͷதͷαʔόʔ • /PEFKTݩʑMJCFW MJCFJPʢεϨουΛͬͯඇ ಉظ*0ͷΑ͏ʹৼͬͯ͘ΕΔϥΠϒϥϦʣΛͬ ͯͯɺMJCVWมΘͬͨ • ଞͷαʔόʔʁ • ࢀߟࢿྉ
• ϚϧνίΞ࣌ͷαʔόϓϩάϥϛϯάͱ )BTLFMMIUUQXXXJJKBEKQDPNQBOZEFWFMPQNFOUUFDI UFDIXFFLQEGUX@@IBTLFMMQEG
·ͱΊ
·ͱΊ • 6/*9ωοτϫʔΫϓϩάϥϛϯάɺࡉ͘ॻ͍ͯ͋ͬ ͯྑ͔ͬͨʢ*0ͷຊͷҰ෦Ͱ͢ʣ • ωοτϫʔΫͷࣝͱϓϩάϥϛϯάɺͰผ ډ͍ͯ͠Δײ͚֮ͩͬͨͲɺίʔυॻ͍ͨΒྑ͘ ͳΕͨ