添加rtthread相关代码

riscv/rtthread/components/lwp/lwp_futex_internal.h

@@ -0,0 +1,54 @@
+/*
+ * Copyright (c) 2006-2023, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2023-11-01     Shell        Init ver.
+ */
+#ifndef __LWP_FUTEX_INTERNAL_H__
+#define __LWP_FUTEX_INTERNAL_H__
+
+#define DBG_TAG "lwp.futex"
+#define DBG_LVL DBG_INFO
+#include <rtdbg.h>
+
+#include "rt_uthash.h"
+#include "lwp_internal.h"
+#include "lwp_pid.h"
+
+#include <rtthread.h>
+#include <lwp.h>
+
+#ifdef ARCH_MM_MMU
+#include <lwp_user_mm.h>
+#endif /* ARCH_MM_MMU */
+
+struct shared_futex_key
+{
+    rt_mem_obj_t mobj;
+    rt_base_t offset;
+};
+DEFINE_RT_UTHASH_TYPE(shared_futex_entry, struct shared_futex_key, key);
+
+struct rt_futex
+{
+    union {
+        /* for private futex */
+        struct lwp_avl_struct node;
+        /* for shared futex */
+        struct shared_futex_entry entry;
+    };
+
+    rt_list_t waiting_thread;
+    struct rt_object *custom_obj;
+    rt_mutex_t mutex;
+};
+typedef struct rt_futex *rt_futex_t;
+
+rt_err_t futex_global_table_add(struct shared_futex_key *key, rt_futex_t futex);
+rt_err_t futex_global_table_find(struct shared_futex_key *key, rt_futex_t *futex);
+rt_err_t futex_global_table_delete(struct shared_futex_key *key);
+
+#endif /* __LWP_FUTEX_INTERNAL_H__ */