Add gettimeofday()

git-svn-id: svn://svn.code.sf.net/p/nuttx/code/trunk@1974 42af7a65-404d-4744-a932-0658087f49c3

1 files changed, 111 insertions, 0 deletions

diff --git a/nuttx/sched/clock_gettimeofday.c b/nuttx/sched/clock_gettimeofday.c
new file mode 100644
index 000000000..ccc6fc9b3
--- /dev/null
+++ b/nuttx/sched/clock_gettimeofday.c
@@ -0,0 +1,111 @@
+/****************************************************************************
+ * sched/clock_gettimeofday.c
+ *
+ *   Copyright (C) 2009 Gregory Nutt. All rights reserved.
+ *   Author: Gregory Nutt <spudmonkey@racsa.co.cr>
+ *
+ * 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 <sys/types.h>
+#include <sys/time.h>
+
+#include <errno.h>
+#include <debug.h>
+#include "clock_internal.h"
+
+/****************************************************************************
+ * Definitions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Type Declarations
+ ****************************************************************************/
+
+/****************************************************************************
+ * Private Function Prototypes
+ ****************************************************************************/
+
+/**************************************************************************
+ * Public Constant Data
+ **************************************************************************/
+
+/****************************************************************************
+ * Public Variables
+ ****************************************************************************/
+
+/**************************************************************************
+ * Private Variables
+ **************************************************************************/
+
+/****************************************************************************
+ * Private Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Public Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ * Function: gettimeofday
+ *
+ * Description:
+ *  Get the current time
+ *
+ ****************************************************************************/
+
+int gettimeofday(struct timeval *tp, void *tzp)
+{
+  struct timespec ts;
+  int ret;
+
+#ifdef CONFIG_DEBUG
+  if (!tp)
+    {
+      errno = EINVAL;
+      return ERROR;
+    }
+#endif
+
+  /* Let clock_gettime do most of the work */
+
+  ret = clock_gettime(CLOCK_REALTIME, &ts);
+  if (ret == OK)
+    {
+       /* Convert the struct timespec to a struct timeval */
+
+       tp->tv_sec  = ts.tv_sec;
+       tp->tv_usec = ts.tv_nsec / NSEC_PER_USEC;
+    }
+  return ret;
+}