thread_win32.c: make some functions static functions.
a patch from Tadashi Saito <shiba AT mail2.accsnet.ne.jp>
in [ruby-core:14407]
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14657 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
RUBY_VM_SET_TIMER_INTERRUPT(), RUBY_VM_INTERRUPTED().
* thread.c, thread_pthread.c, thread_win32.c: fix to ignore time slice
event until sleep.
* bootstraptest/test_thread.rb: add a test for time limited join test.
git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@14654 b2dd03c8-39d4-4d8f-98ff-823fe69b080e