1 files changed, 110 insertions, 0 deletions
diff --git a/nuttx/libc/time/lib_time.c b/nuttx/libc/time/lib_time.c
new file mode 100644
index 000000000..673f6fdcd
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+++ b/nuttx/libc/time/lib_time.c
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+/****************************************************************************
+ * libc/time/lib_time.c
+ *
+ *   Copyright (C) 2011 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <gnutt@nuttx.org>
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in
+ *    the documentation and/or other materials provided with the
+ *    distribution.
+ * 3. Neither the name NuttX nor the names of its contributors may be
+ *    used to endorse or promote products derived from this software
+ *    without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
+ * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
+ * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
+ * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
+ * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
+ * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
+ * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
+ * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ ****************************************************************************/
+
+/****************************************************************************
+ * Included Files
+ ****************************************************************************/
+
+#include <nuttx/config.h>
+
+#include <sys/time.h>
+#include <time.h>
+
+#ifndef CONFIG_DISABLE_CLOCK
+
+/****************************************************************************
+ * Pre-processor Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Data
+ ****************************************************************************/
+ 
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function:  time
+ *
+ * Description:
+ *   Get the current calendar time as a time_t object.  The function returns
+ *   this value, and if the argument is not a null pointer, the value is also
+ *   set to the object pointed by tloc.
+ *
+ *   Note that this function is just a thin wrapper around gettimeofday()
+ *   and is provided for compatibility.  gettimeofday() is the preffered way
+ *   to obtain system time.
+ *
+ * Parameters:
+ *   Pointer to an object of type time_t, where the time value is stored.
+ *   Alternativelly, this parameter can be a null pointer, in which case the
+ *   parameter is not used, but a time_t object is still returned by the
+ *   function.
+ *
+ * Return Value:
+ *   The current calendar time as a time_t object.  If the argument is not
+ *   a null pointer, the return value is the same as the one stored in the
+ *   location pointed by the argument.
+ *
+ *   If the function could not retrieve the calendar time, it returns a -1
+ *   value.
+ *
+ ****************************************************************************/
+
+time_t time(time_t *tloc)
+{
+  struct timeval tp;
+  int ret;
+
+  /* Get the current time from the system */
+
+  ret = gettimeofday(&tp, NULL);
+  if (ret == OK)
+    {
+      /* Return the seconds since the epoch */
+
+      if (tloc)
+        {
+          *tloc = tp.tv_sec;
+        }
+
+      return tp.tv_sec;
+    }
+
+  return (time_t)ERROR;
+}
+
+#endif /* !CONFIG_DISABLE_CLOCK */