添加rtthread相关代码

riscv/rtthread/components/libc/cplusplus/cpp11/armclang/clock.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 <arm-tpl.h>
+#include <sys/time.h>
+#include <rtthread.h>
+
+extern "C" int __ARM_TPL_clock_realtime(__ARM_TPL_timespec_t* __ts)
+{
+    unsigned int t = std::time(nullptr);
+    __ts->tv_sec = t;
+    __ts->tv_nsec = 0;
+    return 0;
+}
+
+extern "C" int __ARM_TPL_clock_monotonic(__ARM_TPL_timespec_t* __ts)
+{
+    unsigned int t = rt_tick_get();
+    __ts->tv_sec = t / RT_TICK_PER_SECOND;
+    __ts->tv_nsec = (t %RT_TICK_PER_SECOND) * NANOSECOND_PER_TICK  ;
+    return 0;
+}