Locking in WebKit

Back in August 2015 we replaced all spinlocks and OS-provided mutexes in WebKit with the new WTF::Lock (WTF stands for Web Template Framework). We also replaced all OS-provided condition variables with WTF::Condition. These new primitives have some cool properties: WTF::Lock and WTF::Condition only require one byte of storage each. WTF::Lock only needs two bits in that byte. The small size encoura

[mumumu-tan]

“This is the most common kind of contention in parallel code, since it’s common to go to great pains to do very little work while holding a lock.”

[yosuke_furukawa]

WebKit の lock 機構が自前で作っていたlockからOSの機能を利用したものに置き換わると。これによって SharedArrayBuffer のような機能が実装しやすくなったと。

[hiragram]

こういうのさくっと読めるようになりたいにゃあ

[Watson]

排他のlock機構をいじってるらしい。