Re:Landing a new syscall, part 1: What is futex?
by gpderetta on Thursday February 10, 2022 @11:54AM
(#30288966)
For a long time the user in fact did not have (easy) access to it. glibc has started to provide a syscall wrapper only very recently, before you had to use syscall directly.
The reason is that the CAS is not part of the interface but it is left to the implementor is that the specific logic is very much application specific and in fact there is not only one way to use it. As discussed elsethread mutexes are only one of the many application of futexes.
The reason is that the CAS is not part of the interface but it is left to the implementor is that the specific logic is very much application specific and in fact there is not only one way to use it. As discussed elsethread mutexes are only one of the many application of futexes.