merges r20982 and r20983 from trunk into ruby_1_9_1.

	* io.c (rb_io_flush): fsync() after buffer is flushed on win32.
	  [ruby-core:20043]

git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_9_1@21035 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

1 files changed, 3 insertions, 0 deletions

diff --git a/io.c b/io.c
index 6057992591..3331d442f4 100644
--- a/io.c
+++ b/io.c
@@ -983,6 +983,9 @@ rb_io_flush(VALUE io)
 
     if (fptr->mode & FMODE_WRITABLE) {
         io_fflush(fptr);
+#ifdef _WIN32
+	fsync(fptr->fd);
+#endif
     }
     if (fptr->mode & FMODE_READABLE) {
         io_unread(fptr);