Public Member Functions
	unfair_mutex (unfair_mutex const &)=delete

	unfair_mutex (unfair_mutex &&)=delete

unfair_mutex &	operator= (unfair_mutex const &)=delete

unfair_mutex &	operator= (unfair_mutex &&)=delete

void	lock () noexcept

bool	try_lock () noexcept
	When try_lock() is called from a thread that already owns the lock it will return false.

void	unlock () noexcept

Detailed Description

An unfair mutex This is a fast implementation of a mutex which does not fairly arbitrate between multiple blocking threads.

Due to the unfairness it is possible that blocking threads will be completely starved.

This mutex however does block on a operating system's futex/unfair_mutex primitives and therefor thread priority are properly handled.

On windows and Linux the compiler generally emits the following sequence of instructions:

non-contented:
- lock(): MOV r,1; XOR r,r; LOCK CMPXCHG; JNE (skip)
- unlock(): LOCK XADD [],-1; CMP; JE

Member Function Documentation

bool tt::unfair_mutex::try_lock ( )

inlinenoexcept

When try_lock() is called from a thread that already owns the lock it will return false.

Calling try_lock() in a loop will bypass the operating system's wait system, meaning that no priority inversion will take place.

The documentation for this class was generated from the following file: