[gegl] Define fsync to _commit on the Windows platform

[Michael Schumacher <schumaml src gnome org>]

commit e14974c1c2a3d71c8187863029d738608bf88691
Author: Michael Schumacher <schumaml gmx de>
Date:   Mon Jun 20 23:12:50 2011 +0200

    Define fsync to _commit on the Windows platform

 configure.ac                         |    5 +++++
 gegl/buffer/gegl-tile-backend-file.c |    8 ++++++++
 2 files changed, 13 insertions(+), 0 deletions(-)
---
diff --git a/configure.ac b/configure.ac
index 9d4eaee..63cdd02 100644
--- a/configure.ac
+++ b/configure.ac
@@ -399,6 +399,11 @@ CFLAGS="$CFLAGS $MMX_EXTRA_CFLAGS $SSE_EXTRA_CFLAGS"
 ########################
 GOBJECT_INTROSPECTION_CHECK([0.6.7])
 
+########################
+# Check for fsync
+########################
+AC_CHECK_FUNCS(fsync)
+
 ###############################
 # Checks for required libraries
 ###############################
diff --git a/gegl/buffer/gegl-tile-backend-file.c b/gegl/buffer/gegl-tile-backend-file.c
index 294949a..75c4fef 100644
--- a/gegl/buffer/gegl-tile-backend-file.c
+++ b/gegl/buffer/gegl-tile-backend-file.c
@@ -38,6 +38,14 @@
 //#include "gegl-types-internal.h"
 
 
+#ifndef HAVE_FSYNC
+
+#ifdef G_OS_WIN32
+#define fsync _commit
+#endif
+
+#endif
+
 struct _GeglTileBackendFile
 {
   GeglTileBackend  parent_instance;