HelenOS sources

ACCESS_ONCE        59 kernel/generic/include/barrier.h #define ACCESS_ONCE(var) (*((volatile typeof(var)*)&(var)))
ACCESS_ONCE        61 uspace/lib/c/include/barrier.h #define ACCESS_ONCE(var) (*((volatile typeof(var)*)&(var)))
ACCESS_ONCE        61 uspace/lib/posix/include/libc/barrier.h #define ACCESS_ONCE(var) (*((volatile typeof(var)*)&(var)))