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+/**
+ * @file
+ *
+ * @ingroup ScoreTOD
+ *
+ * @brief Time of Day Handler API
+ */
+
+/*
+ * COPYRIGHT (c) 1989-2009.
+ * On-Line Applications Research Corporation (OAR).
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifndef _RTEMS_SCORE_TODIMPL_H
+#define _RTEMS_SCORE_TODIMPL_H
+
+#include <rtems/score/tod.h>
+#include <rtems/score/timestamp.h>
+#include <rtems/score/timecounterimpl.h>
+#include <rtems/score/watchdog.h>
+
+#include <sys/time.h>
+#include <time.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/**
+ * @defgroup ScoreTOD Time of Day Handler
+ *
+ * @ingroup Score
+ *
+ * The following constants are related to the time of day and are
+ * independent of RTEMS.
+ */
+/**@{*/
+
+/**
+ * This constant represents the number of seconds in a minute.
+ */
+#define TOD_SECONDS_PER_MINUTE (uint32_t)60
+
+/**
+ * This constant represents the number of minutes per hour.
+ */
+#define TOD_MINUTES_PER_HOUR (uint32_t)60
+
+/**
+ * This constant represents the number of months in a year.
+ */
+#define TOD_MONTHS_PER_YEAR (uint32_t)12
+
+/**
+ * This constant represents the number of days in a non-leap year.
+ */
+#define TOD_DAYS_PER_YEAR (uint32_t)365
+
+/**
+ * This constant represents the number of hours per day.
+ */
+#define TOD_HOURS_PER_DAY (uint32_t)24
+
+/**
+ * This constant represents the number of seconds in a day which does
+ * not include a leap second.
+ */
+#define TOD_SECONDS_PER_DAY (uint32_t) (TOD_SECONDS_PER_MINUTE * \
+ TOD_MINUTES_PER_HOUR * \
+ TOD_HOURS_PER_DAY)
+
+/**
+ * This constant represents the number of seconds in a non-leap year.
+ */
+#define TOD_SECONDS_PER_NON_LEAP_YEAR (365 * TOD_SECONDS_PER_DAY)
+
+/**
+ * This constant represents the number of millisecond in a second.
+ */
+#define TOD_MILLISECONDS_PER_SECOND (uint32_t)1000
+
+/**
+ * This constant represents the number of microseconds in a second.
+ */
+#define TOD_MICROSECONDS_PER_SECOND (uint32_t)1000000
+
+/**
+ * This constant represents the number of nanoseconds in a second.
+ */
+#define TOD_NANOSECONDS_PER_SECOND (uint32_t)1000000000
+
+/**
+ * This constant represents the number of nanoseconds in a mircosecond.
+ */
+#define TOD_NANOSECONDS_PER_MICROSECOND (uint32_t)1000
+
+/**@}*/
+
+/**
+ * Seconds from January 1, 1970 to January 1, 1988. Used to account for
+ * differences between POSIX API and RTEMS core. The timespec format time
+ * is kept in POSIX compliant form.
+ */
+#define TOD_SECONDS_1970_THROUGH_1988 \
+ (((1987 - 1970 + 1) * TOD_SECONDS_PER_NON_LEAP_YEAR) + \
+ (4 * TOD_SECONDS_PER_DAY))
+
+/**
+ * @brief Earliest year to which an time of day can be initialized.
+ *
+ * The following constant define the earliest year to which an
+ * time of day can be initialized. This is considered the
+ * epoch.
+ */
+#define TOD_BASE_YEAR 1988
+
+/**
+ * @defgroup ScoreTOD Time Of Day (TOD) Handler
+ *
+ * @ingroup Score
+ *
+ * This handler encapsulates functionality used to manage time of day.
+ */
+/**@{*/
+
+/**
+ * @brief TOD control.
+ */
+typedef struct {
+ /**
+ * @brief Time of day seconds trigger.
+ *
+ * This value specifies the nanoseconds since the last time of day second.
+ * It is updated and evaluated in _TOD_Tickle_ticks(). It is set in
+ * _TOD_Set_with_timestamp().
+ */
+ uint32_t seconds_trigger;
+
+ /**
+ * @brief Indicates if the time of day is set.
+ *
+ * This is true if the application has set the current
+ * time of day, and false otherwise.
+ */
+ bool is_set;
+} TOD_Control;
+
+SCORE_EXTERN TOD_Control _TOD;
+
+/**
+ * @brief Initializes the time of day handler.
+ *
+ * Performs the initialization necessary for the Time Of Day handler.
+ */
+void _TOD_Handler_initialization(void);
+
+/**
+ * @brief Sets the time of day from timestamp.
+ *
+ * The @a tod_as_timestamp timestamp represents the time since UNIX epoch.
+ * The watchdog seconds chain will be adjusted.
+ *
+ * @param[in] tod_as_timestamp is the constant of the time of day as a timestamp
+ */
+void _TOD_Set_with_timestamp(
+ const Timestamp_Control *tod_as_timestamp
+);
+
+/**
+ * @brief Sets the time of day from timespec.
+ *
+ * The @a tod_as_timestamp timestamp represents the time since UNIX epoch.
+ * The watchdog seconds chain will be adjusted.
+ *
+ * In the process the input given as timespec will be transformed to FreeBSD
+ * bintime format to guarantee the right format for later setting it with a
+ * timestamp.
+ *
+ * @param[in] tod_as_timespec is the constant of the time of day as a timespec
+ */
+static inline void _TOD_Set(
+ const struct timespec *tod_as_timespec
+)
+{
+ Timestamp_Control tod_as_timestamp;
+
+ _Timestamp_Set(
+ &tod_as_timestamp,
+ tod_as_timespec->tv_sec,
+ tod_as_timespec->tv_nsec
+ );
+ _TOD_Set_with_timestamp( &tod_as_timestamp );
+}
+
+/**
+ * @brief Gets the current time in the bintime format.
+ *
+ * @param[out] time is the value gathered by the bintime request
+ */
+static inline void _TOD_Get(
+ Timestamp_Control *time
+)
+{
+ _Timecounter_Bintime(time);
+}
+
+/**
+ * @brief Gets the current time in the timespec format.
+ *
+ * @param[out] time is the value gathered by the nanotime request
+ */
+static inline void _TOD_Get_as_timespec(
+ struct timespec *time
+)
+{
+ _Timecounter_Nanotime(time);
+}
+
+/**
+ * @brief Gets the system uptime with potential accuracy to the nanosecond.
+ *
+ * This routine returns the system uptime with potential accuracy
+ * to the nanosecond.
+ *
+ * The initial uptime value is undefined.
+ *
+ * @param[in] time is a pointer to the uptime to be returned
+ */
+static inline void _TOD_Get_uptime(
+ Timestamp_Control *time
+)
+{
+ _Timecounter_Binuptime( time );
+}
+
+/**
+ * @brief Gets the system uptime with potential accuracy to the nanosecond.
+ * to the nanosecond.
+ *
+ * The initial uptime value is zero.
+ *
+ * @param[in] time is a pointer to the uptime to be returned
+ */
+static inline void _TOD_Get_zero_based_uptime(
+ Timestamp_Control *time
+)
+{
+ _Timecounter_Binuptime( time );
+ --time->sec;
+}
+
+/**
+ * @brief Gets the system uptime with potential accuracy to the nanosecond.
+ *
+ * The initial uptime value is zero.
+ *
+ * @param[in] time is a pointer to the uptime to be returned
+ */
+static inline void _TOD_Get_zero_based_uptime_as_timespec(
+ struct timespec *time
+)
+{
+ _Timecounter_Nanouptime( time );
+ --time->tv_sec;
+}
+
+/**
+ * @brief Number of seconds Since RTEMS epoch.
+ *
+ * The following contains the number of seconds from 00:00:00
+ * January 1, TOD_BASE_YEAR until the current time of day.
+ */
+static inline uint32_t _TOD_Seconds_since_epoch( void )
+{
+ return (uint32_t) _Timecounter_Time_second;
+}
+
+/**
+ * @brief Increments time of day at each clock tick.
+ *
+ * This routine increments the ticks field of the current time of
+ * day at each clock tick.
+ */
+void _TOD_Tickle_ticks( void );
+
+/**
+ * @brief Gets number of ticks in a second.
+ *
+ * This method returns the number of ticks in a second.
+ *
+ * @note If the clock tick value does not multiply evenly into a second
+ * then this number of ticks will be slightly shorter than a second.
+ */
+uint32_t TOD_TICKS_PER_SECOND_method(void);
+
+/**
+ * @brief Gets number of ticks in a second.
+ *
+ * This method exists to hide the fact that TOD_TICKS_PER_SECOND can not
+ * be implemented as a macro in a .h file due to visibility issues.
+ * The Configuration Table is not available to SuperCore .h files but
+ * is available to their .c files.
+ */
+#define TOD_TICKS_PER_SECOND TOD_TICKS_PER_SECOND_method()
+
+/**
+ * This routine returns a timeval based upon the internal timespec format TOD.
+ */
+
+RTEMS_INLINE_ROUTINE void _TOD_Get_timeval(
+ struct timeval *time
+)
+{
+ _Timecounter_Microtime( time );
+}
+
+/**
+ * @brief Adjust the Time of Time
+ *
+ * This method is used to adjust the current time of day by the
+ * specified amount.
+ *
+ * @param[in] delta is the amount to adjust
+ */
+void _TOD_Adjust(
+ const Timestamp_Control timestamp
+);
+
+/**
+ * @brief Check if the TOD is Set
+ *
+ * @return TRUE is the time is set. FALSE otherwise.
+ */
+RTEMS_INLINE_ROUTINE bool _TOD_Is_set( void )
+{
+ return _TOD.is_set;
+}
+
+/**
+ * @brief Absolute timeout conversion results.
+ *
+ * This enumeration defines the possible results of converting
+ * an absolute time used for timeouts to POSIX blocking calls to
+ * a number of ticks for example.
+ */
+typedef enum {
+ /** The timeout is invalid. */
+ TOD_ABSOLUTE_TIMEOUT_INVALID,
+ /** The timeout represents a time that is in the past. */
+ TOD_ABSOLUTE_TIMEOUT_IS_IN_PAST,
+ /** The timeout represents a time that is equal to the current time. */
+ TOD_ABSOLUTE_TIMEOUT_IS_NOW,
+ /** The timeout represents a time that is in the future. */
+ TOD_ABSOLUTE_TIMEOUT_IS_IN_FUTURE,
+} TOD_Absolute_timeout_conversion_results;
+
+/**
+ * @brief Convert absolute timeout to ticks.
+ *
+ * This method takes an absolute time being used as a timeout
+ * to a blocking directive, validates it and returns the number
+ * of corresponding clock ticks for use by the SuperCore.
+ *
+ * @param[in] abstime is a pointer to the timeout
+ * @param[out] ticks_out will contain the number of ticks
+ *
+ * @return This method returns the number of ticks in @a ticks_out
+ * and a status value indicating whether the absolute time
+ * is valid, in the past, equal to the current time or in
+ * the future as it should be.
+ */
+TOD_Absolute_timeout_conversion_results _TOD_Absolute_timeout_to_ticks(
+ const struct timespec *abstime,
+ Watchdog_Interval *ticks_out
+);
+
+/**@}*/
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif
+/* end of include file */