Puas yog C ++ muaj multithreading?

2024 Tus sau: Lynn Donovan | [email protected]. Kawg hloov kho: 2023-12-15 23:47

A multithreaded program muaj ob lossis ntau qhov chaw uas ua tau khiav concurrently. Txhua feem ntawm qhov kev zov me nyuam yog npe a xov , thiab cwb xov txhais ib txoj kev sib cais. C++ ua tsis muaj kev txhawb nqa built-in rau multithreaded daim ntawv thov.

Tom qab ntawd, ib tug kuj yuav nug, yog C ++ ib leeg threaded?

Multithreading hauv C ++ Multithreading kev txhawb nqa tau qhia hauv C + 11. C++ 11 Nws muab tag nrho tej ntawd tseg thiab muab peb tej kev txhaum tseg:: xov . Cov xov cov chav kawm thiab cov haujlwm muaj feem cuam tshuam tau txhais nyob rau hauv xov header ntaub ntawv. std:: xov yog cov xov chav kawm uas sawv cev rau a ib xov hauv C++.

Ib sab saum toj no, Python ib leeg threaded lossis multithreaded? Cov lus teb luv luv yog yog, lawv yog ib threaded . JRuby yog multithreaded thiab tuaj yeem khiav hauv tomcat zoo li lwm yam java code. MRI (default ruby) thiab Python ob leeg muaj GIL (Global Interpreter Lock) thiab yog li ntawd ib threaded.

Tsis tas li lo lus nug yog, C ++ daim ntawv qhia xov puas nyab xeeb?

2 Teb. Tus qauv C ++ 11 tau lees paub tias txoj kev nkag mus rau cov thawv yog nyab xeeb los ntawm txawv xov (piv txwv li, ob qho tib si siv cov txheej txheem const). Yog li cov lus teb luv luv: koj yog nyab xeeb , ntev li lwm tus xov tsis ncaj qha mess nrog qhov tshwj xeeb nkag rau hauv daim ntawv qhia.

Ntau cov xov puas tuaj yeem hu rau tib lub luag haujlwm?

Ntau threads hu rau tib lub luag haujlwm ntawm ib yam sij hawm. Txhua muaj nuj nqi hu muaj nws tus kheej cov txheej txheem ntawm lub zos variables thiab yuav tsis txhob cuam tshuam lwm tus xov los yog lwm yam hu ntawm tib lub luag haujlwm hauv hu pawg. Txawm li cas los xij, tag nrho cov peev txheej uas tuaj yeem sib koom ntawm xov muaj peev xwm txaus ntshai.