drd: Improve thread startup code for non-Linux platforms

Ivo Raisr had reported that thread startup was slow on Solaris.
This patch reduces the thread startup time on Solaris.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@15687 a5019735-40e9-0310-863c-91ae7b9d1cf9
1 file changed