kosaki	2010-12-26 21:59:19 +0900 (Sun, 26 Dec 2010)

  New Revision: 30387

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=rev&revision=30387

  Log:
    * process.c (before_exec): add small comment.

  Modified files:
    trunk/ChangeLog
    trunk/process.c

Index: ChangeLog
===================================================================
--- ChangeLog	(revision 30386)
+++ ChangeLog	(revision 30387)
@@ -1,3 +1,7 @@
+Sun Dec 26 20:28:34 2010  KOSAKI Motohiro  <kosaki.motohiro@g...>
+
+	* process.c (before_exec): add small comment.
+
 Sun Dec 26 20:52:21 2010  Tanaka Akira  <akr@f...>
 
 	* ext/socket/mkconstants.rb: define INET_ADDRSTRLEN as 16 if not
Index: process.c
===================================================================
--- process.c	(revision 30386)
+++ process.c	(revision 30387)
@@ -995,6 +995,10 @@
 
 static int forked_child = 0;
 
+/*
+ * On old MacOS X, exec() may return ENOTSUPP if the process have multiple threads.
+ * Therefore we have to kill internal threads at once. [ruby-core: 10583]
+ */
 #define before_exec() \
     (rb_enable_interrupt(), (void)(forked_child ? 0 : (rb_thread_stop_timer_thread(), 1)))
 #define after_exec() \

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