mutex

The mutex type

In NBC the mutex type is a 32-bit value that is used to synchronize access to resources shared across multiple threads. For this reason there is never a reason to declare a mutex variable inside a task or a subroutine. It is designed for global variables that all tasks or functions can acquire or release in order to obtain exclusive access to a resource that other tasks or functions are also trying to use.

  dseg segment
    motorMutex mutex
  dseg ends

  thread main
    acquire motorMutex
    // use the motor(s) protected by this mutex.
    release motorMutex
    wait MS_500
  endt