Threads, Processes

Version B

The CMY printer simulation

• Demonstration
• Description:
  • There are three layers (cyan, magenta and yellow) of an image (download them here) 
  • Each of the layers is put on the white paper pixel by pixel by a separate thread
  • Each layer is being drawn starting from different corner
• The program:
  • the visualisation of printing (see the demonstration)
• Technical requirements:
  • No two threads should draw to the same pixel at the same time
  • Use Critical Section, Semaphore or Mutex for synchronisation
  • The visualisation should not flicker
  • No thread should be running after the main window is closed
  • The use of a Timer (CreateTimer, WM_TIMER) is forbidden
  • The use of busy waiting is forbidden
• Hints:
  • CreateThread, _begin_thread() 
  • CRITICAL_SECTION, CreateSemaphore(), CreateMutex()
  • WaitForSingleObject() (doesn't apply to CRITICAL_SECTION, so if you choose this way of synchronisation, you need to deal with proper ending of the program in some other way)
• Approximate points:
  • the problem solution: 4.0
  • proper use and synchronisation of threads: 4.0 
  • drawing: 2.0