1 files changed, 70 insertions, 0 deletions
diff --git a/components/vbus/rt_watermark_queue.c b/components/vbus/rt_watermark_queue.c
new file mode 100644
index 0000000000..9c551fa525
--- /dev/null
+++ b/components/vbus/rt_watermark_queue.c
@@ -0,0 +1,70 @@
+/*
+ * Water Gauge
+ *
+ * COPYRIGHT (C) 2014, Shanghai Real-Thread Technology Co., Ltd
+ *
+ *  This file is part of RT-Thread (http://www.rt-thread.org)
+ *
+ *  All rights reserved.
+ *
+ *  This program is free software; you can redistribute it and/or modify
+ *  it under the terms of the GNU General Public License as published by
+ *  the Free Software Foundation; either version 2 of the License, or
+ *  (at your option) any later version.
+ *
+ *  This program is distributed in the hope that it will be useful,
+ *  but WITHOUT ANY WARRANTY; without even the implied warranty of
+ *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ *  GNU General Public License for more details.
+ *
+ *  You should have received a copy of the GNU General Public License along
+ *  with this program; if not, write to the Free Software Foundation, Inc.,
+ *  51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2014-04-16     Grissiom     first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "rt_watermark_queue.h"
+
+void rt_wm_que_set_mark(struct rt_watermark_queue *wg,
+                             unsigned int low, unsigned int high)
+{
+    RT_ASSERT(low <= high);
+
+    wg->high_mark = high;
+    wg->low_mark = low;
+}
+
+void rt_wm_que_init(struct rt_watermark_queue *wg,
+                         unsigned int low, unsigned int high)
+{
+    rt_wm_que_set_mark(wg, low, high);
+    rt_list_init(&wg->suspended_threads);
+    wg->level = 0;
+}
+
+void rt_wm_que_dump(struct rt_watermark_queue *wg)
+{
+    struct rt_list_node *node;
+
+    rt_kprintf("wg %p: low: %d, high: %d, cur: %d\n",
+               wg, wg->low_mark, wg->high_mark, wg->level);
+    rt_kprintf("thread suspend:");
+    for (node = wg->suspended_threads.next;
+         node != &wg->suspended_threads;
+         node = node->next)
+    {
+        rt_thread_t thread;
+
+        thread = rt_list_entry(wg->suspended_threads.next,
+                               struct rt_thread,
+                               tlist);
+        rt_kprintf(" %.*s", RT_NAME_MAX, thread->name);
+    }
+    rt_kprintf("\n");
+}