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- /****************************************************************************
- * sched/clock/clock.h
- *
- * Copyright (C) 2007-2009, 2014, 2017 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.
- *
- ****************************************************************************/
- #ifndef __SCHED_CLOCK_CLOCK_H
- #define __SCHED_CLOCK_CLOCK_H
- /****************************************************************************
- * Included Files
- ****************************************************************************/
- #include <nuttx/config.h>
- #include <stdint.h>
- #include <nuttx/clock.h>
- #include <nuttx/compiler.h>
- /****************************************************************************
- * Pre-processor Definitions
- ****************************************************************************/
- /* Configuration ************************************************************/
- /* If CONFIG_SYSTEM_TIME64 is selected and the CPU supports long long types,
- * then a 64-bit system time will be used.
- */
- #ifndef CONFIG_HAVE_LONG_LONG
- # undef CONFIG_SYSTEM_TIME64
- #endif
- /****************************************************************************
- * Public Type Definitions
- ****************************************************************************/
- /****************************************************************************
- * Public Data
- ****************************************************************************/
- #if !defined(CONFIG_SCHED_TICKLESS) && !defined(__HAVE_KERNEL_GLOBALS)
- /* The system clock exists (CONFIG_SCHED_TICKLESS), but it not prototyped
- * globally in include/nuttx/clock.h.
- */
- # ifdef CONFIG_SYSTEM_TIME64
- extern volatile uint64_t g_system_timer;
- # else
- extern volatile uint32_t g_system_timer;
- # endif
- #endif
- #ifndef CONFIG_CLOCK_TIMEKEEPING
- extern struct timespec g_basetime;
- #endif
- /****************************************************************************
- * Public Function Prototypes
- ****************************************************************************/
- int clock_basetime(FAR struct timespec *tp);
- void weak_function clock_initialize(void);
- #ifndef CONFIG_SCHED_TICKLESS
- void weak_function clock_timer(void);
- #endif
- int clock_abstime2ticks(clockid_t clockid,
- FAR const struct timespec *abstime,
- FAR sclock_t *ticks);
- int clock_time2ticks(FAR const struct timespec *reltime,
- FAR sclock_t *ticks);
- int clock_ticks2time(sclock_t ticks, FAR struct timespec *reltime);
- #endif /* __SCHED_CLOCK_CLOCK_H */
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