ReleaseSemaphore does not release the semaphore

Question

(In short: main()\'s WaitForSingleObject hangs in the program below).

I\'m trying to write a piece of code that dispatches threads and waits for them to finish befor

Answer 1

Here is a practical solution.

I wanted my main program to use threads (then using more than one core) to munch jobs and wait for all the threads to complete before resuming and doing other stuff. I did not want to let the threads die and create new ones because that's slow. In my question, I was trying to do that by suspending the threads, which seemed natural. But as nobugz pointed out, "Thou canst control threading with Suspend/ReleaseThread()".

The solution involves semaphores like the one I was using to control the threads. Actually one more semaphore is used to control the main thread. Now I have one semaphore per thread to control the threads and one semaphore to control the main.

Here is the solution:

#include 
#include 
#include 
#include 

#define TRY  500000
#define LOOP 100

HANDLE *ids;
HANDLE *semaphores;
HANDLE allThreadsSemaphore;

DWORD WINAPI Count(__in LPVOID lpParameter)
{   
    float x = 1.0f;         
    while(1)
    {   
        WaitForSingleObject(semaphores[(int)lpParameter],INFINITE);
        for (int i=1 ; i