Re: Synchronising between processes - how do I use a Security_Descriptor?

From:

"Scott McPhillips [MVP]" <org-dot-mvps-at-scottmcp>

Newsgroups:

microsoft.public.vc.mfc

Date:

Thu, 19 Jul 2007 18:30:58 -0400

Message-ID:

<daSdnTaZbYCqewLbnZ2dnUVZ_tSknZ2d@comcast.com>

Simon L wrote:

MyApp

- Create a Mutex

- Create a process

- - Console App -> checks for mutex ownership , does stuff, then
releases the mutex

- Wait for Mutex ownership to be granted

Now, is this the right way to achieve what I want? (ie run a program
as if it were a function in my app).
As far as I can tell, the Mutex can be an Event, however I think I
need to fill in a SECURITY_DESCRIPTOR and a SECURITY_ATTRIBUTES
structure in order to allow the child process ownership of the Mutex.
I can find scant information for this structure in MSDN (it just
points to a host of functions that use it).

Do I also need to do anything clever with CreateProcess? I normally
fill it with 0, FALSE and NULL ...

Thanks

If all you want is to make your app wait until the new process ends then
there is an easier way. CreateProcess returns to you a
PROCESS_INFORMATION struct, which contains hProcess. Your app will
suspend until the new process ends if you do this:

WaitForSingleObject(hProcess, INFINITE);

You don't need the security stuff (unless your app is a service).

--
Scott McPhillips [MVP VC++]