This library is very simple: it just provides a shim around the Java 8 Unsafe methods used for memory fencing. Because these methods do not exist in the Java 6 and Java 7 Unsafe, this library allows compiling those calls with a provided boolean guard.
This library must be built on Java 8 or a version of Java that has the three fence methods: fullFence, storeFence, and loadFence.
Simply use com.headius.unsafe.fences.UnsafeFences.SUPPORTS_FENCES and the shim *Fence methods to call the fence API safely across Java versions.