forked from Imagelibrary/rtems
dfcec5595f
The single write to memory or ioport output are mostly atomic operations already. The proper memory synchronization barrier should be used around them to guarantee ordering (sync or eieio on PowerPC for example) but because I have not found settable portable primitive only compiler barrier is used. It should be enough on x86 because the externally visible order should be/is guaranteed to be preserved on x86 architecture.