merges r20346 from trunk into ruby_1_9_1.

* process.c (rb_fork): stops the timer thread during fork.
  [ruby-dev:37117]

* thread.c (rb_thread_start_timer_thread): timer thread needs
  system_working to be set.

git-svn-id: http://svn.ruby-lang.org/repos/ruby/branches/ruby_1_9_1@20406 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 1 insertions, 0 deletions

diff --git a/thread.c b/thread.c
index 9c4c6da18..dad5c1c28 100644
--- a/thread.c
+++ b/thread.c
@@ -2371,6 +2371,7 @@ rb_thread_reset_timer_thread(void)
 void
 rb_thread_start_timer_thread(void)
 {
+    system_working = 1;
     rb_thread_create_timer_thread();
 }