normal	2017-10-01 06:50:42 +0900 (Sun, 01 Oct 2017)

  New Revision: 60079

  https://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=60079

  Log:
    thread_pthread.c: do not wakeup inside child processes
    
    * thread_pthread.c (rb_thread_wakeup_timer_thread): check
      ownership before incrementing
      (rb_thread_wakeup_timer_thread_low): ditto
      [Bug #13794] [ruby-core:83064]

  Modified files:
    trunk/thread_pthread.c
Index: thread_pthread.c
===================================================================
--- thread_pthread.c	(revision 60078)
+++ thread_pthread.c	(revision 60079)
@@ -1318,17 +1318,21 @@ void https://github.com/ruby/ruby/blob/trunk/thread_pthread.c#L1318
 rb_thread_wakeup_timer_thread(void)
 {
     /* must be safe inside sighandler, so no mutex */
-    ATOMIC_INC(timer_thread_pipe.writing);
-    rb_thread_wakeup_timer_thread_fd(&timer_thread_pipe.normal[1]);
-    ATOMIC_DEC(timer_thread_pipe.writing);
+    if (timer_thread_pipe.owner_process == getpid()) {
+	ATOMIC_INC(timer_thread_pipe.writing);
+	rb_thread_wakeup_timer_thread_fd(&timer_thread_pipe.normal[1]);
+	ATOMIC_DEC(timer_thread_pipe.writing);
+    }
 }
 
 static void
 rb_thread_wakeup_timer_thread_low(void)
 {
-    ATOMIC_INC(timer_thread_pipe.writing);
-    rb_thread_wakeup_timer_thread_fd(&timer_thread_pipe.low[1]);
-    ATOMIC_DEC(timer_thread_pipe.writing);
+    if (timer_thread_pipe.owner_process == getpid()) {
+	ATOMIC_INC(timer_thread_pipe.writing);
+	rb_thread_wakeup_timer_thread_fd(&timer_thread_pipe.low[1]);
+	ATOMIC_DEC(timer_thread_pipe.writing);
+    }
 }
 
 /* VM-dependent API is not available for this function */

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