isn't it: 
enum SYNC_STATE m_iSyncState

m_iSncState = SYNC_NONE / SYNC_SLAVE / SYNC_MASTER

I am struggling little bit with the naming. "State" is often a state of a state machine, but in this case not. 

What about: 
enum SyncMode m_syncMode = SYNC_NONE / SYNC_SLAVE / SYNC_MASTER

Style: 
* No type prefix for int
* enum type not capitalized: