1 files changed, 101 insertions, 0 deletions
diff --git a/cpukit/libcsupport/src/sync.c b/cpukit/libcsupport/src/sync.c
new file mode 100644
index 0000000000..e1deefc293
--- /dev/null
+++ b/cpukit/libcsupport/src/sync.c
@@ -0,0 +1,101 @@
+/*
+ *  sync() - XXX ??? where is this defined
+ *
+ *  This function operates by as follows:
+ *    for all threads
+ *      for all FILE *
+ *         fsync()
+ *         fdatasync()
+ *
+ *  COPYRIGHT (c) 1989-2008.
+ *  On-Line Applications Research Corporation (OAR).
+ *
+ *  The license and distribution terms for this file may be
+ *  found in the file LICENSE in this distribution or at
+ *  http://www.rtems.com/license/LICENSE.
+ *
+ *  $Id$
+ */
+
+#if HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+/* Since we compile with strict ANSI we need to undef it to get
+ * prototypes for extensions
+ */
+#undef __STRICT_ANSI__
+int fdatasync(int);        /* still not always prototyped */
+
+
+#include <unistd.h>
+#include <stdio.h>
+
+#include <rtems.h>
+/*
+#define __RTEMS_VIOLATE_KERNEL_VISIBILITY__
+
+#include <rtems/libio_.h>
+#include <rtems/seterr.h>
+*/
+
+/* XXX check standards -- Linux version appears to be void */
+void _fwalk(struct _reent *, void *);
+
+
+static void sync_wrapper(FILE *f)
+{
+  int fn = fileno(f);
+
+  /*
+   *  We are explicitly NOT checking the return values as it does not
+   *  matter if they succeed.  We are just making a best faith attempt
+   *  at both and trusting that we were passed a good FILE pointer.
+   */
+  fsync(fn);
+  fdatasync(fn);
+}
+
+/* iterate over all FILE *'s for this thread */
+static void sync_per_thread(Thread_Control *t)
+{
+   struct _reent *current_reent;
+   struct _reent *this_reent;
+
+   /*
+    *  The sync_wrapper() function will operate on the current thread's
+    *  reent structure so we will temporarily use that.
+    */
+   this_reent = t->libc_reent;
+   if ( this_reent ) {
+     current_reent = _Thread_Executing->libc_reent;
+     _Thread_Executing->libc_reent = this_reent;
+     _fwalk (t->libc_reent, sync_wrapper);
+     _Thread_Executing->libc_reent = current_reent;
+   }
+}
+
+/*
+ * _global_impure_ptr is not prototyped in any .h files.
+ * We have to extern it here.
+ */
+extern struct _reent * const _global_impure_ptr __ATTRIBUTE_IMPURE_PTR__;
+
+void sync(void)
+{
+
+  /*
+   *  Walk the one used initially by RTEMS.
+   */
+  _fwalk(_global_impure_ptr, sync_wrapper);
+
+  /*
+   *  XXX Do we walk the one used globally by newlib?
+   *  XXX Do we need the RTEMS global one?
+   */
+
+  /*
+   *  Now walk all the per-thread reentrancy structures.
+   */
+  rtems_iterate_over_all_threads(sync_per_thread);
+}