Synchronized memory port

Synchronized memory port is a kind of stream to exchange data between threads (Fig. 8). Since all threads in a process share the heap memory, if one thread binds an object to a global variable, it instantly becomes visible to other threads. However, shared memory lacks capability to send events that the global data is updated. Synchronized memory port ensures this synchronization for accessing a shared object. A synchronized memory port object consists of one buffer slot and two semaphores used for synchronizing read and write.