* thread.c (rb_thread_select): release GVL while waiting select().

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@31400 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

ChangeLog

@@ -1,3 +1,7 @@
+Sun May  1 01:06:24 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
+
+	* thread.c (rb_thread_select): release GVL while waiting select().
+
 Sat Apr 30 23:10:15 2011  KOSAKI Motohiro  <kosaki.motohiro@gmail.com>
 
 	* win32/win32.c (rb_w32_fdcopy): New. This can copy even though

thread.c

@@ -2672,7 +2672,17 @@ rb_thread_select(int max, fd_set * read, fd_set * write, fd_set * except,
 	return 0;
     }
     else {
-	return select(max, read, write, except, timeout);
+	int lerrno;
+	int result;
+
+	BLOCKING_REGION({
+		result = select(max, read, write, except, timeout);
+		if (result < 0)
+		    lerrno = errno;
+	    }, ubf_select, GET_THREAD());
+	errno = lerrno;
+
+	return result;
     }
 }