Events

An event is an object that differs from a semaphore only slightly. Consider the functions for working with events.

• CreateEvent Creates an event object. This function accepts the following parameters:

  • First parameterThis has the same meaning as the first parameter of the CreateSemaphore function. Usually, it is set to NULL .

  • Second parameterIf this parameter is not equal to zero, then the event can be reset using the ResetEvent function. Otherwise , the event is reset if any process tries to access it.

  • Third parameterIf this parameter is zero, then the event is initialized as reset; otherwise, the signal about the appropriate situation is sent immediately.

  • Fourth parameterThis is the pointer to the string containing the eventname.

• Waiting for event is carried out the same way as waiting for the semaphoreusing the WaitForSingleObject function.

• The openEvent function is similar to the OpenSemaphore function. Therefore, I won't concentrate your attention on it.

• SetEvent Sends the signal that the event has occurred. The only parameter of this function is the handle to the event object.