150 lines
4.9 KiB
C
150 lines
4.9 KiB
C
/************************************************************************
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* sched/clock_settime.c
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*
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* Copyright (C) 2007, 2009, 2011 Gregory Nutt. All rights reserved.
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* Author: Gregory Nutt <gnutt@nuttx.org>
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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* 3. Neither the name NuttX nor the names of its contributors may be
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* used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN
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* ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*
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************************************************************************/
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/************************************************************************
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* Included Files
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************************************************************************/
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#include <nuttx/config.h>
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#include <nuttx/rtc.h>
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#include <time.h>
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#include <assert.h>
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#include <errno.h>
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#include <debug.h>
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#include <arch/irq.h>
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#include "clock_internal.h"
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/************************************************************************
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* Definitions
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************************************************************************/
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/************************************************************************
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* Private Type Declarations
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************************************************************************/
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/************************************************************************
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* Private Function Prototypes
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************************************************************************/
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/**********************************************************************
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* Public Constant Data
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**********************************************************************/
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/************************************************************************
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* Public Variables
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************************************************************************/
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/**********************************************************************
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* Private Variables
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**********************************************************************/
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/************************************************************************
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* Private Functions
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************************************************************************/
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/************************************************************************
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* Public Functions
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************************************************************************/
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/************************************************************************
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* Name: clock_settime
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*
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* Description:
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* Clock Functions based on POSIX APIs
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*
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************************************************************************/
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int clock_settime(clockid_t clock_id, FAR const struct timespec *tp)
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{
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irqstate_t flags;
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int ret = OK;
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sdbg("clock_id=%d\n", clock_id);
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DEBUGASSERT(tp != NULL);
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/* CLOCK_REALTIME - POSIX demands this to be present. This is the wall
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* time clock.
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*/
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#ifdef CONFIG_RTC
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if (clock_id == CLOCK_REALTIME || clock_id == CLOCK_ACTIVETIME)
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#else
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if (clock_id == CLOCK_REALTIME)
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#endif
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{
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/* Interrupts are disabled here so that the in-memory time
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* representation and the RTC setting will be as close as
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* possible.
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*/
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flags = irqsave();
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/* Save the new base time. */
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g_basetime.tv_sec = tp->tv_sec;
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g_basetime.tv_nsec = tp->tv_nsec;
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/* Get the elapsed time since power up (in milliseconds) biased
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* as appropriate.
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*/
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g_tickbias = g_system_timer;
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/* Setup the RTC (lo- or high-res) */
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#ifdef CONFIG_RTC
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if (g_rtc_enabled && clock_id != CLOCK_ACTIVETIME)
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{
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up_rtc_settime(tp);
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}
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#endif
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irqrestore(flags);
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sdbg("basetime=(%d,%d) tickbias=%d\n",
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(int)g_basetime.tv_sec, (int)g_basetime.tv_nsec,
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(int)g_tickbias);
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}
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else
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{
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sdbg("Returning ERROR\n");
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set_errno(EINVAL);
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ret = ERROR;
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}
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return ret;
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}
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