usa	2015-07-09 15:38:16 +0900 (Thu, 09 Jul 2015)

  New Revision: 51203

  http://svn.ruby-lang.org/cgi-bin/viewvc.cgi?view=revision&revision=51203

  Log:
    * win32/win32.c (waitpid): fixed return value of previous commit.  thanks, nobu!

  Modified files:
    trunk/win32/win32.c
Index: win32/win32.c
===================================================================
--- win32/win32.c	(revision 51202)
+++ win32/win32.c	(revision 51203)
@@ -4296,10 +4296,11 @@ waitpid(rb_pid_t pid, int *stat_loc, int https://github.com/ruby/ruby/blob/trunk/win32/win32.c#L4296
 
 	while (!(pid = poll_child_status(child, stat_loc))) {
 	    /* wait... */
-	    errno = 0;
-	    if (rb_w32_wait_events_blocking(&child->hProcess, 1, timeout) != WAIT_OBJECT_0) {
+	    int ret = rb_w32_wait_events_blocking(&child->hProcess, 1, timeout);
+	    if (ret == WAIT_OBJECT_0 + 1) return -1; /* maybe EINTR */
+	    if (ret != WAIT_OBJECT_0) {
 		/* still active */
-		if ((options & WNOHANG) || errno == EINTR) {
+		if (options & WNOHANG) {
 		    pid = 0;
 		    break;
 		}

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