tree ffcef8effda7444472f73d6690e221978e9d3847
parent 6cb7b9e924d84125f21f4a2a96aa0d59466056fe
author Nikhil Benesch <nikhil.benesch@gmail.com> 1602573475 +0000
committer Benny Siegert <bsiegert@gmail.com> 1602660244 +0000

runtime: correct semaphore implementation on netbsd

NetBSD's semaphores use the underlying lighweight process mechanism
(LWP) on NetBSD, rather than pthreads. This means the m.prodcid needs
to be set to the LWP ID rather than the pthread ID in order for unpark
notifications to get sent to the right place.

Introduce a new getProcID() method that selects the correct ID for the
platform.

Change-Id: I897406e5a9d5bb9025088680ee9f89b9a6c8ff11
Reviewed-on: https://go-review.googlesource.com/c/gofrontend/+/261742
Run-TryBot: Martin Möhrmann <moehrmann@google.com>
Trust: Than McIntosh <thanm@google.com>
Trust: Benny Siegert <bsiegert@gmail.com>
Reviewed-by: Benny Siegert <bsiegert@gmail.com>