[components/libc] Move time() and clock() function to libc time.c.

1 files changed, 52 insertions, 0 deletions

diff --git a/components/libc/compilers/newlib/time.c b/components/libc/compilers/newlib/time.c
index 29755dca2c..e7ad19ad3c 100644
--- a/components/libc/compilers/newlib/time.c
+++ b/components/libc/compilers/newlib/time.c
@@ -23,3 +23,55 @@ int gettimeofday(struct timeval *tp, void *ignore)
     return 0;
 }
 #endif
+
+/**
+ * Returns the current time.
+ *
+ * @param time_t * t the timestamp pointer, if not used, keep NULL.
+ *
+ * @return time_t return timestamp current.
+ *
+ */
+/* for IAR 6.2 later Compiler */
+#if defined (__IAR_SYSTEMS_ICC__) &&  (__VER__) >= 6020000
+#pragma module_name = "?time"
+time_t (__time32)(time_t *t) /* Only supports 32-bit timestamp */
+#else
+time_t time(time_t *t)
+#endif
+{
+    time_t time_now = 0;
+
+#ifdef RT_USING_RTC
+    static rt_device_t device = RT_NULL;
+
+    /* optimization: find rtc device only first. */
+    if (device == RT_NULL)
+    {
+        device = rt_device_find("rtc");
+    }
+
+    /* read timestamp from RTC device. */
+    if (device != RT_NULL)
+    {
+        if (rt_device_open(device, 0) == RT_EOK)
+        {
+            rt_device_control(device, RT_DEVICE_CTRL_RTC_GET_TIME, &time_now);
+            rt_device_close(device);
+        }
+    }
+#endif /* RT_USING_RTC */
+
+    /* if t is not NULL, write timestamp to *t */
+    if (t != RT_NULL)
+    {
+        *t = time_now;
+    }
+
+    return time_now;
+}
+
+RT_WEAK clock_t clock(void)
+{
+    return rt_tick_get();
+}