Import rtems wrapper from rtems git

[yaffs2.git] / rtems / rtems_yaffs_os_context.c

diff --git a/rtems/rtems_yaffs_os_context.c b/rtems/rtems_yaffs_os_context.c
new file mode 100644 (file)
index 0000000..1885b9b
--- /dev/null
+++ b/rtems/rtems_yaffs_os_context.c
@@ -0,0 +1,89 @@
+/*
+ * YAFFS port to RTEMS
+ *
+ * Copyright (c) 2011 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Obere Lagerstr. 30
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ *
+ * As a special exception, linking other files with the object code from
+ * this one to produce an executable application does not by itself cause
+ * the resulting executable application to be covered by the GNU General
+ * Public License.
+ * This exception does not however invalidate any other reasons why the
+ * executable file might be covered by the GNU Public License. In particular,
+ * the other YAFFS files are not covered by this exception, and using them
+ * in a proprietary application requires a paid license from Aleph One.
+ */
+
+#include "rtems_yaffs.h"
+
+#include <assert.h>
+#include <errno.h>
+
+static void rtems_yaffs_default_lock(struct yaffs_dev *dev, void *arg)
+{
+       rtems_status_code sc = RTEMS_SUCCESSFUL;
+       rtems_yaffs_default_os_context *os_context = arg;
+
+        sc = rtems_semaphore_obtain(
+               os_context->semaphore_id,
+               RTEMS_WAIT,
+               RTEMS_NO_TIMEOUT
+       );
+       assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void rtems_yaffs_default_unlock(struct yaffs_dev *dev, void *arg)
+{
+       rtems_status_code sc = RTEMS_SUCCESSFUL;
+       rtems_yaffs_default_os_context *os_context = arg;
+
+        sc = rtems_semaphore_release(os_context->semaphore_id);
+       assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void rtems_yaffs_default_unmount(struct yaffs_dev *dev, void *arg)
+{
+       rtems_status_code sc = RTEMS_SUCCESSFUL;
+       rtems_yaffs_default_os_context *os_context = arg;
+
+        sc = rtems_semaphore_delete(os_context->semaphore_id);
+       assert(sc == RTEMS_SUCCESSFUL);
+}
+
+int rtems_yaffs_initialize_default_os_context(
+       rtems_yaffs_default_os_context *os_context
+)
+{
+       rtems_status_code sc = RTEMS_SUCCESSFUL;
+
+       os_context->os_context.lock = rtems_yaffs_default_lock;
+       os_context->os_context.unlock = rtems_yaffs_default_unlock;
+       os_context->os_context.unmount = rtems_yaffs_default_unmount;
+
+       sc = rtems_semaphore_create(
+               rtems_build_name('Y', 'A', 'F', 'S'),
+               1,
+               RTEMS_LOCAL
+                       | RTEMS_BINARY_SEMAPHORE
+                       | RTEMS_INHERIT_PRIORITY
+                       | RTEMS_PRIORITY,
+               0,
+               &os_context->semaphore_id
+       );
+       if (sc == RTEMS_SUCCESSFUL) {
+               return 0;
+       } else {
+               errno = ENOMEM;
+
+               return -1;
+       }
+}