hg: jdk/jdk: 8220795: Rework naked_short_nanosleep on Windows to improve time-to-safepoint

[robin.westberg at oracle.com]

Changeset: 0b6dc5b93306
Author:    rwestberg
Date:      2019-04-24 14:03 +0200
URL:       http://hg.openjdk.java.net/jdk/jdk/rev/0b6dc5b93306

8220795: Rework naked_short_nanosleep on Windows to improve time-to-safepoint
Reviewed-by: dholmes, rehn

! src/hotspot/os/windows/os_windows.cpp
! src/hotspot/share/runtime/safepoint.cpp