Mutex: Avoid magic values that aren't available on mac
Mutex: Avoid magic values that aren't available on mac

davidhesselbom/rock,fredrikbryntesson/rock,shamanas/rock,magic-lang/rock,thomasfanell/rock,marcusnaslund/rock,cogneco/rock,marcusnaslund/rock,cogneco/rock,fredrikbryntesson/rock,zhaihj/rock,shamanas/rock,kirbyfan64/rock,ooc-lang/rock,fasterthanlime/rock,magic-lang/rock,kirbyfan64/rock,fasterthanlime/rock,thomasfanell/rock,ds84182/rock,jonathanudd/rock,jonathanudd/rock,davidhesselbom/rock,ds84182/rock,zhaihj/rock,ooc-lang/rock