thread_pthread.c: avoid lock ping-pong in do_gvl_timer & ubf_select

This simplifies the locking logic somewhat.

While we're at it, designate_timer_thread is worthless in
ubf_select because gvl_acquire_common already guarantees there
is a gvl.timer if gvl->waitq is populated.

In the future (for auto-fiber), this will allow using
th->unblock.func for rb_waitpid callers (via rb_sigchld_handler).

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@64575 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

0 files changed, 0 insertions, 0 deletions