添加rtthread相关代码

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

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-20     Shell        Add cond var API in kernel
+ */
+
+#ifndef __LWP_TERMINAL_CONDVAR_H__
+#define __LWP_TERMINAL_CONDVAR_H__
+
+#include <rtthread.h>
+
+typedef struct rt_condvar
+{
+#ifdef USING_RT_OBJECT
+    struct rt_object parent;
+#endif
+    rt_atomic_t waiters_cnt;
+    rt_atomic_t waiting_mtx;
+    struct rt_wqueue event;
+} *rt_condvar_t;
+
+void rt_condvar_init(rt_condvar_t cv, char *name);
+int rt_condvar_timedwait(rt_condvar_t cv, rt_mutex_t mtx, int suspend_flag,
+                         rt_tick_t timeout);
+int rt_condvar_signal(rt_condvar_t cv);
+int rt_condvar_broadcast(rt_condvar_t cv);
+
+rt_inline void rt_condvar_detach(rt_condvar_t cv)
+{
+    RT_UNUSED(cv);
+    return ;
+}
+
+#endif /* __LWP_TERMINAL_CONDVAR_H__ */