Locking in WebKitBack 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
