8 Apr
2003
8 Apr
'03
3:57 p.m.
The glibc has
internal support for atomic operations (at least
atomic_add() is there and allows a negative argument, so
atomic_sub() is there too and exchange_and_add(&lff->filled, 0)
will provide an atomic read), so there is no problem about
portability on Linux systems (and even other systems).
You should probably special case architectures where 32bit read/write is
atomic, as its a common case at the moment.