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

components/libc/compilers/dlib/syscall_close.c

@@ -0,0 +1,38 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2015-01-28     Bernard      first version
+ */
+
+#include <rtthread.h>
+#include <LowLevelIOInterface.h>
+#include <unistd.h>
+#include <compiler_private.h>
+#define DBG_TAG    "dlib.syscall.close"
+#define DBG_LVL    DBG_INFO
+#include <rtdbg.h>
+
+/*
+ * The "__close" function should close the file corresponding to
+ * "handle".  It should return 0 on success and nonzero on failure.
+ */
+
+#pragma module_name = "?__close"
+
+int __close(int handle)
+{
+    if (handle == _LLIO_STDOUT ||
+        handle == _LLIO_STDERR ||
+        handle == _LLIO_STDIN)
+        return _LLIO_ERROR;
+#ifdef DFS_USING_POSIX
+    return close(handle);
+#else
+    LOG_W(_WARNING_WITHOUT_FS);
+    return _LLIO_ERROR;
+#endif /* DFS_USING_POSIX */
+}