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Semaphores!!!!

Can anyone help me to invoke or link those threads or make threads wait on the semaphore created?

For example, I create 10 threads, I need to make these threads wait on a semaphore and whenever a semaphore signals, one thread should be pciked.

In the example 10 threads are created. How will I use semaphores to signal anyone of these threasd?

#include <iostream.h>
#include <windows.h>

DWORD WINAPI TT1();
DWORD threadid;

void main()
{

HANDLE hMyThread[10];

DWORD MyThreadID[10];

      for(int i=0; i<10;i++)
      {
hMyThread[i] = CreateThread(NULL, 0,(LPTHREAD_START_ROUTINE)TT1,
                                                       NULL, 0, &MyThreadID[i]);

            threadid = *(&MyThreadID[i]);

            cout<< "threadid" << threadid <<endl;

            WaitForSingleObject(hMyThread, INFINITE);

            cout<< "threadid" << *(&MyThreadID[i]) <<endl;

      }

}

DWORD WINAPI TT1()
{

      cout << "In TT1 - Thread Created" <<endl;
      return 0;

}

Any help appreciated.
Please let me know
thanks

Ajar

If your requierement is to achieve synchronization between many threads running in a
same process only you can use criticalSection apis instead of semaphores which I think are
system wide locks .

The main funcitons are :

#Create Critical section
#Enter Critical section
#leave Critical section
#Delete Critical section

have a look at these apis

http://msdn.microsoft.com/library/default.asp?url=/library/en-us/dllproc/base/synchronization_functions.asp

ASKER CERTIFIED SOLUTION

pohheng

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