Synchronous Entry Points

During its execution, the application can enter the protocol synchronously for the following:

• Lock Acquire - When the application needs a lock, it depends on the underlying HLRC protocol to get the lock from the current owner and perform the appropriate coherence actions.
• Lock Release - When the application needs to release the lock, it uses the HLRC protocol to manage the released lock and perform the appropriate coherence actions.
• Barrier - The application depends on the HLRC protocol to implement a barrier among the participating nodes.
• Page fault - When the application tries to access shared data which has been invalidated as a result of a coherence action, a page fault is generated. The page fault handler, installed by the HLRC protocol at initialization, will fetch the shared page from its home.