duerst	2018-09-05 15:04:02 +0900 (Wed, 05 Sep 2018)

  New Revision: 64635

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=64635

  Log:
    define ubf_list_atfork() as empty on cygwin

  Modified files:
    trunk/thread_pthread.c
Index: thread_pthread.c
===================================================================
--- thread_pthread.c	(revision 64634)
+++ thread_pthread.c	(revision 64635)
@@ -1380,6 +1380,7 @@ ubf_wakeup_all_threads(void) https://github.com/ruby/ruby/blob/trunk/thread_pthread.c#L1380
 #define ubf_select 0
 static void ubf_wakeup_all_threads(void) { return; }
 static int ubf_threads_empty(void) { return 1; }
+#define ubf_list_atfork() do {} while (0)
 #endif /* USE_UBF_LIST */
 
 #define TT_DEBUG 0

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