Re: asynchronous access by Paul
Paul
Mon Jul 07 09:22:24 PDT 2008
Seems like you should know this before you start working on operating system
development. Generally, synchronous means that the buffer is only used in
the context of a device manager call. For example, WriteFile(), ReadFile(),
or DeviceIoControl().
Asynchronous generally means that the buffer might be accessed at a time or
in a context not associated with such a call. A buffer read from or written
to by an interrupt handler, which of course does not execute in the context
of a device manager call like those above, would be accessed
"asynchronously".
Paul T.
"daniel" <daniel@discussions.microsoft.com> wrote in message
news:422667C4-10FF-4ED4-9ABF-0D623CF283E3@microsoft.com...
> Like ceallocasynchronousbuffer api description, this api must be used by
> synchronous access.
> what does it mean by synchronous access or asynchronous acess?