#define SHARED_MEMORY_DEFAULT ( 100 * ( 1 << 20 ) ) // 100mb for the shared memory
#define STACK_SIZE_DEFAULT ( ( 1 << 20 ) * 20 ) //20 mb out of the above 100 mb for my stack.
-#if USE_CHECKPOINTING
+#if USE_MPROTECT_SNAPSHOT
//Each snapshotrecord lists the firstbackingpage that must be written to revert to that snapshot
struct SnapShotRecord {
unsigned int firstBackingPage;