import RT-Thread@9217865c without bsp, libcpu and components/net

components/vbus/watermark_queue.c

@@ -0,0 +1,52 @@
+/*
+ * COPYRIGHT (C) 2011-2021, Real-Thread Information Technology Ltd
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2014-04-16     Grissiom     first version
+ */
+
+#include <rthw.h>
+#include <rtthread.h>
+
+#include "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->parent.name);
+    }
+    rt_kprintf("\n");
+}