This example will show how to create critical sections with the standard C type function calls OSCritEnter() and OSCritLeave(), and compare them to the C++ object type which eliminates the problem of matching each OSCritEnter() to a corresponding OSCritLeave().

While this example is trivial with only a simple global variable, critical sections need to be used for objects, such as linked lists, that could be changed by multiple tasks. In such cases, each task would use a critical section to ensure the modifications could be completed before a task switch occurred.