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How Communicating Sequential Goroutines Work
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Koki Ide
March 25, 2017
Technology
2
19k
How Communicating Sequential Goroutines Work
Koki Ide
March 25, 2017
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Transcript
None
,PLJ*EF !OJDPOFHPUP .FSDBSJ4PV[PI*OD TPQIPNPSFPGUIF6OJWFSTJUZPG5PLZP
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"HFOEB 4IBSFENFNPSZBOE.FTTBHFQBTTJOH*1$ $PODVSSFODZ.PEFM $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF
$PODVSSFODZ.PEFM
$PODVSSFODZ.PEFM %POPUDPNNVOJDBUFCZTIBSJOHNFNPSZ JOTUFBE TIBSFNFNPSZCZDPNNVOJDBUJOH
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ɾ4IBSFENFNPSZ*OUFSQSPDFTT$PNNVOJDBUJPO ɾ.FTTBHFQBTTJOH*OUFSQSPDFTT$PNNVOJDBUJPO $PODVSSFODZͷΞϓϩʔνํ๏ *1$ େ͖͘छྨʹ͔ΕΔ ڠௐϓϩηεؒͰڞ༗ϝϞϦྖҬ͕֬อ͞ΕΔ ڠௐϓϩηεؒͷϝοηʔδަͰ௨৴͢Δ $PODVSSFODZ.PEFM
ಉ͡ॲཧ ੜ࢈ऀফඅऀ Λॻ͍ͯΈΔ ɾ4IBSFENFNPSZ*OUFSQSPDFTT$PNNVOJDBUJPO ɾ.FTTBHFQBTTJOH*OUFSQSPDFTT$PNNVOJDBUJPO ڠௐϓϩηεؒͰڞ༗ϝϞϦྖҬ͕֬อ͞ΕΔ ڠௐϓϩηεؒͷϝοηʔδަͰ௨৴͢Δ $PODVSSFODZ.PEFM
ɾ4IBSFENFNPSZ*OUFSQSPDFTT$PNNVOJDBUJPO $ Ͱॻ͍ͯΈͨྫ $PODVSSFODZ.PEFM
ੜ࢈ऀHPPETΛੜ࢈ͯ͠RVFVFʹQVTI͢Δ ফඅऀEPOFͷΛݟͯɺHPPET͕ۭ͔Ͳ͏͔ ֬ೝͯ͠ɺRVFVF͔ΒQPQ͢Δ ফඅ͠ऴΘͬͨΒEPOFΛUSVFʹ͢Δ $PODVSSFODZ.PEFM
(PͰॻ͍ͯΈͨྫ ɾ.FTTBHFQBTTJOH*OUFSQSPDFTT$PNNVOJDBUJPO $PODVSSFODZ.PEFM
ੜ࢈ऀHPPETΛੜ࢈ͯ͠DIBOOFMʹ͛Δ ੜ࢈͕ऴΘͬͨΒEPOFΛ͛Δ ফඅऀDIBOOFM͔Βड͚औΔ EPOFΛड͚औͬͨΒॲཧΛऴ͑Δ $PODVSSFODZ.PEFM
4IBSFENFNPSZBOE.FTTBHFQBTTJOH*1$
$PODVSSFODZ.PEFM
4IBSFENFNPSZ*OUFSQSPDFTT$PNNVOJDBUJPO جຊతʹ04ϓϩηεΛଞϓϩηεͷϝϞϦʹΞΫηεͤ͞ͳ͍ ͜ͷ੍ΛͭҎ্ͷϓϩηε͕औΓআ͘ඞཁ͕͋Δ σʔλͷܗࣜҰϓϩηεؒͰܾΊΔͨΊɺ04ؔΘΒͳ͍ ಉ͡Ґஔʹಉ࣌ʹॻ͖ࠐ·ͳ͍͜ͱΛ࣮֬ʹ͢Δඞཁ͕͋Δ 4IBSFENFNPSZϞσϧͷಛ
ϝϞϦͰߦ͑ΔͷͰૣ͍ ϝοηʔδύογϯάҰൠతʹTZTDBMM Ͱ࣮͞ΕΔͷͰɺΧʔωϧΛհࡏͨ͠ࣄΛඞཁͱ͢ΔͨΊ͍ ϨʔείϯσΟγϣϯ͕ى͜Βͳ͍Α͏ʹϩοΫΛͱΔ͜ͱ͕ଟ͍ͨΊ Ұൠతʹ࣮͍͠ͱ͞ΕΔ 4IBSFENFNPSZ*OUFSQSPDFTT$PNNVOJDBUJPO 4IBSFENFNPSZϞσϧͷಛ
.FTTBHFQBTTJOH*OUFSQSPDFTT$PNNVOJDBUJPO
খ͍͞σʔλΛަ͢Δͷʹ༗ޮ .FTTBHFQBTTJOHϞσϧͷಛ 4IBSFENFNPSZϞσϧʹൺ࣮ͯ༰қͱ͞ΕΔ .FTTBHFQBTTJOH*OUFSQSPDFTT$PNNVOJDBUJPO
$PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF
$PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF HPSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦ TFMFDU DIBOOFM HPSPVUJOFؒͰͷϝοηʔδύογϯάΛߦ͏ CZUFͷܰྔͳεϨουͷΑ͏ͳͷ ෳͷDIBOOFMͷड৴Λಉ࣌ʹߦ͏߹ͳͲʹ༻͍Δ
HPSPVUJOF ҙͷͷ04εϨουʹҙͷͷΰϧʔνϯΛεέδϡʔϦϯά͢Δ ./εέδϡʔϦϯάΛ࠾༻ ίϯςΩετεΠονΛ࣮͘͢ߦ͠γεςϜͷͯ͢ͷί ΞΛ׆༻Ͱ͖Δ͕εέδϡʔϥʔͷՃ͕ࡶ (Pͦͷࡶ͞ΛؾʹͤͣίʔυΛॻ͚ΔΑ͏ʹͯ͘͠Ε͍ͯΔ ਆʂʂ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
IUUQTUBMLTHPEPDPSHHJUIVCDPNOJDPOFHPUPUBMLTDPODVSSFODZTMJEF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
IUUQRJJUBDPNOJDPOFHPUPJUFNTEDEGDDDC $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
DIBOOFM ܕࢦఆ͕ՄೳͰɺTFOESFDFJWFͰϒϩοΫ͢Δ pSTUDMBTTWBMVFͳͷͰҾΓʹ͑Δ CV⒎FSΛࢦఆ͢Δ͜ͱͰ4FNBQIPSFతͳ͍ํՄೳ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
#MPDLJOH2VFVFతͳ͍ํ ༗ݶPSແݶͷCV⒎FSΛ࣋ͭΩϡʔɻ ΩϟύγςΟΛӽ͑ͯՃ͠Α͏ͱ͢Δͱ͖ٴͼۭ ͷঢ়ଶͰऔΓग़ͦ͏ͱ͢Δͱ͖ʹϒϩοΫ͢Δ͜ͱ ͰɺͭͷϓϩηεͰڞ༗ࢿݯͷॴ༗ݖΛมߋͯ͠ ಉظ͢Δɻ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦ DIBOOFM
4FNBQIPSFతͳ͍ํ ڞ༗ࢿݯʹରͯ͠ΞΫηεՄೳͳ ϓϩηεͷΛ੍ݶ͢Δ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦ DIBOOFM
TFMFDU ෳͷDIBOOFMͷಡΈॻ͖Λ੍ޚͯ͘͠ΕΔ UJNFPVUఆظ࣮ߦͳͲʹ༻͍Δ͜ͱ͕Ͱ͖Δ DIBOOFMΛڠྗʹαϙʔτ ਆ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
TFMFDU UJNFPVU ඵ͢ΔͱUJNFPVU͢Δ ԼΛඵʹ͢ΔͱzSFTVMUz͕ฦΔ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦
ఆظ࣮ߦ ຖඵఆظ࣮ߦ͞Εɺ ඵͰUJNFPVU͢Δ $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOF $PNNVOJDBUJOH4FRVFOUJBM(PSPVUJOFͰ༻͍ΒΕ͍ͯΔ෦ TFMFDU
4VNNBSZ $PODVSSFODZʹେ͖͚ͯ͘ 4IBSFENFNPSZͱ.FTTBHFQBTTJOH͕͋Γɺརͱ͕ܽ͋Δ DIBOOFMͱTFMFDUͰڧྗͳ.FTTBHFQBTTJOHΛ࣮ݱͰ͖Δ TZODύοέʔδΛ͑ഉଞ੍ޚͰ͖Δ͚Ͳɺ (PΒ͘͠DIBOOFM͍͜ͳͯ͠zTIBSFNFNPSZCZDPNNVOJDBUJOHz HPSPVUJOF͍͢͝ɻSVOUJNFҎԼΛಡ͏ʂʂ
(P࠷ߴʂʂʂʂʂ 4VNNBSZ
,PLJ*EF !OJDPOFHPUP .FSDBSJ4PV[PI*OD TPQIPNPSFPGUIF6OJWFSTJUZPG5PLZP