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

components/libc/cplusplus/cpp11/gcc/utils.cpp

@@ -0,0 +1,29 @@
+/*
+ * Copyright (c) 2006-2021, RT-Thread Development Team
+ *
+ * SPDX-License-Identifier: Apache-2.0
+ *
+ * Change Logs:
+ * Date           Author       Notes
+ * 2021-04-27     flybreak     the first version.
+ */
+
+#include "__utils.h"
+#include <sys/time.h>
+
+tick_clock::time_point tick_clock::now()
+{
+    tick_clock::rep cur_tk = clock();
+    tick_clock::duration cur_time(cur_tk);
+
+    return tick_clock::time_point(cur_time);
+}
+
+real_time_clock::time_point real_time_clock::now() noexcept
+{
+    timespec tp;
+    clock_gettime(CLOCK_REALTIME, &tp);
+
+    return time_point(duration(std::chrono::seconds(tp.tv_sec))
+                        + std::chrono::nanoseconds(tp.tv_nsec));
+}