first commit for chrg

2025-08-16 22:58:22 +08:00
commit 52a3ed5862
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+/*
+ * Copyright (c) 2006-2024 RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2010-11-17     yi.qiu       first version
+ */
+
+#include <rtthread.h>
+#include <rtm.h>
+
+#include "dlmodule.h"
+
+/**
+ * @brief  close a dynamically loaded shared library.
+ *
+ * @param  handle the handle which identifies the shared library to be closed.
+ * @return int it returns RT_TRUE on success.
+ *
+ * @note   This function is an API of POSIX standard, which is designed to decrease the reference count (nref) for a dynamically loaded module
+ *         and destroy it if no references remain.
+ */
+int dlclose(void *handle)
+{
+    struct rt_dlmodule *module;
+
+    RT_ASSERT(handle != RT_NULL);
+
+    module = (struct rt_dlmodule *)handle;
+
+    rt_enter_critical();
+    module->nref--;
+    if (module->nref <= 0)
+    {
+        rt_exit_critical();
+
+        dlmodule_destroy(module);
+    }
+    else
+    {
+        rt_exit_critical();
+    }
+
+    return RT_TRUE;
+}
+RTM_EXPORT(dlclose)