wininet: Remove the custom thread pool implementation and use QueueUserWorkItem instead.

[Jacek Caban]

Hi Rob,

Robert Shearman wrote:
> ---
>  dlls/wininet/internet.c |  184 
> +++++------------------------------------------
>  dlls/wininet/internet.h |    3 -
>  2 files changed, 19 insertions(+), 168 deletions(-)
>
> This also fixes a bug in the old code where starting a new 
> asynchronous operation with more than 10 asynchronous operations in 
> progress would fail.
...

> -    LPWORKREQUEST lpRequest = NULL;
> +    LPWORKREQUEST lpRequest = lpvParam;
> +    WORKREQUEST workRequest;
>  
>      TRACE("\n");
>  
> -    EnterCriticalSection(&csQueue);
> +    memcpy(&workRequest, lpRequest, sizeof(WORKREQUEST));
> +    HeapFree(GetProcessHeap(), 0, lpRequest);
>  
> -    if (lpHeadWorkQueue)
> -    {
> -        lpRequest = lpHeadWorkQueue;
> -        lpHeadWorkQueue = lpHeadWorkQueue->prev;
> -	if (lpRequest == lpWorkQueueTail)
> -            lpWorkQueueTail = lpHeadWorkQueue;
> -    }
> -
> -    LeaveCriticalSection(&csQueue);
> -
> -    if (lpRequest)
> -    {
> -        memcpy(lpWorkRequest, lpRequest, sizeof(WORKREQUEST));
> -        HeapFree(GetProcessHeap(), 0, lpRequest);
> -	bSuccess = TRUE;
> -	InterlockedDecrement(&dwNumJobs);
> -    }
> +    workRequest.asyncproc(&workRequest);
>  
> -    return bSuccess;
> +    WININET_Release( workRequest.hdr );
> +    return TRUE;
>  }
>   
Why do you copy lpRequest to workRequest? You could use lpRequest
in asyncproc and WININET_Release and call HeapFree before return.
Then workRequest may be removed.

Thanks,
    Jacek