Re: notifying from inside or outside

On 2025-05-09, Bonita Montero <Bonita.Montero@gmail.com> wrote:

So for Windows it's the best to notify individually while holding the
mutex.
All tests are with 31 threads waiting for a notification and one thread
which is notifying.

When you hit a condition variable while holding the mutex, you're
including, in the mutex's critical region, all those instructions needed
to perform that operation, possibly requiring a trip to the kernel.

There have to be conditions (no pun intended) under which that causes
a problem; you're just not hitting them in your test case.

--
TXR Programming Language: http://nongnu.org/txr
Cygnal: Cygwin Native Application Library: http://kylheku.com/cygnal
Mastodon: @Kazinator@mstdn.ca