105 lines
4.0 KiB
C
105 lines
4.0 KiB
C
/********************************************************************************
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* sched/clock/clock.h
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*
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* Copyright (C) 2007-2009, 2014 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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#ifndef __SCHED_CLOCK_CLOCK_H
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#define __SCHED_CLOCK_CLOCK_H
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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 <stdint.h>
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#include <nuttx/clock.h>
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#include <nuttx/compiler.h>
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/********************************************************************************
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* Pre-processor Definitions
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********************************************************************************/
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/* Configuration ************************************************************/
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/* If CONFIG_SYSTEM_TIME64 is selected and the CPU supports long long types,
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* then a 64-bit system time will be used.
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*/
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#ifndef CONFIG_HAVE_LONG_LONG
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# undef CONFIG_SYSTEM_TIME64
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#endif
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/********************************************************************************
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* Public Type Definitions
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********************************************************************************/
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/********************************************************************************
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* Global Variables
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********************************************************************************/
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#if !defined(CONFIG_SCHED_TICKLESS) && !defined(__HAVE_KERNEL_GLOBALS)
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/* The system clock exists (CONFIG_SCHED_TICKLESS), but it not prototyped
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* globally in include/nuttx/clock.h.
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*/
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# ifdef CONFIG_SYSTEM_TIME64
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extern volatile uint64_t g_system_timer;
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# else
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extern volatile uint32_t g_system_timer;
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# endif
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#endif
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#ifdef CONFIG_SYSTEM_TIME64
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extern uint64_t g_tickbias;
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#else
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extern uint32_t g_tickbias;
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#endif
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extern struct timespec g_basetime;
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/********************************************************************************
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* Public Function Prototypes
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********************************************************************************/
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void weak_function clock_initialize(void);
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#ifndef CONFIG_SCHED_TICKLESS
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void weak_function clock_timer(void);
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#endif
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int clock_abstime2ticks(clockid_t clockid,
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FAR const struct timespec *abstime,
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FAR int *ticks);
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int clock_time2ticks(FAR const struct timespec *reltime, FAR int *ticks);
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int clock_ticks2time(int ticks, FAR struct timespec *reltime);
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#endif /* __SCHED_CLOCK_CLOCK_H */
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