The Ecere SDK - sdk/blob - ecere/src/sys/Condition.ec

   1 #if defined(BUILDING_ECERE_COM)
   2 import "Semaphore"
   3 #else
   4 import "ecere"
   5 #endif
   6
   7 public class Condition : struct
   8 {
   9    const char * name;
  10    Mutex lock { };
  11    int waiting;
  12    int signals;
  13    Semaphore waitSem { };
  14    Semaphore waitDone { };
  15
  16 public:
  17    property const char * name
  18    {
  19       set { name = value; }
  20       get { return name; }
  21    }
  22
  23    void Signal()
  24    {
  25       lock.Wait();
  26       if (waiting > signals)
  27       {
  28          signals++;
  29          waitSem.Release();
  30          lock.Release();
  31          waitDone.Wait();
  32       }
  33       else
  34          lock.Release();
  35    }
  36
  37    void Wait(Mutex mutex)
  38    {
  39       lock.Wait();
  40       waiting++;
  41       lock.Release();
  42
  43       mutex.Release();
  44
  45       waitSem.Wait();
  46
  47       lock.Wait();
  48       if(signals > 0)
  49       {
  50          waitDone.Release();
  51          signals--;
  52       }
  53       waiting--;
  54       lock.Release();
  55
  56       mutex.Wait();
  57    }
  58 }