添加rtthread相关代码

riscv/rtthread/components/drivers/include/ipc/completion.h

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ */
+#ifndef COMPLETION_H_
+#define COMPLETION_H_
+
+#include <rtdef.h>
+#include <rtconfig.h>
+
+/**
+ * Completion - A tiny IPC implementation for resource-constrained scenarios
+ *
+ * It's an IPC using one CPU word with the encoding:
+ *
+ * BIT      | MAX-1 ----------------- 1 |       0        |
+ * CONTENT  |   suspended_thread & ~1   | completed flag |
+ */
+
+struct rt_completion
+{
+    /* suspended thread, and completed flag */
+    rt_base_t susp_thread_n_flag;
+};
+
+#define RT_COMPLETION_INIT(comp) {0}
+
+void rt_completion_init(struct rt_completion *completion);
+rt_err_t rt_completion_wait(struct rt_completion *completion,
+                            rt_int32_t            timeout);
+void rt_completion_done(struct rt_completion *completion);
+rt_err_t rt_completion_wakeup(struct rt_completion *completion);
+
+#endif