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score: _Watchdog_Is_far_future_realtime_timespec()

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Update #3117.
Update #3182.
This commit is contained in:
Sebastian Huber
2017-10-19 13:38:48 +02:00
parent ecef369875
commit adaf5c232e
1 changed files with 32 additions and 9 deletions
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41
cpukit/score/include/rtems/score/watchdogimpl.h
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@@ -284,8 +284,11 @@ RTEMS_INLINE_ROUTINE void _Watchdog_Next_first(
}
}
#define WATCHDOG_NANOSECONDS_PER_SECOND 1000000000
/**
* @brief The bits necessary to store 1000000000 nanoseconds.
* @brief The bits necessary to store 1000000000
* (= WATCHDOG_NANOSECONDS_PER_SECOND) nanoseconds.
*
* The expiration time is an unsigned 64-bit integer. To store absolute
* timeouts we use 30 bits (2**30 == 1073741824) for the nanoseconds and 34
@@ -293,6 +296,29 @@ RTEMS_INLINE_ROUTINE void _Watchdog_Next_first(
*/
#define WATCHDOG_BITS_FOR_1E9_NANOSECONDS 30
/**
* @brief The maximum number of seconds representable in the realtime watchdog
* format.
*
* We have 2**34 bits for the seconds part.
*/
#define WATCHDOG_REALTIME_MAX_SECONDS 0x3ffffffff
RTEMS_INLINE_ROUTINE bool _Watchdog_Is_valid_timespec(
const struct timespec *ts
)
{
return ts != NULL
&& (unsigned long) ts->tv_nsec < WATCHDOG_NANOSECONDS_PER_SECOND;
}
RTEMS_INLINE_ROUTINE bool _Watchdog_Is_far_future_realtime_timespec(
const struct timespec *ts
)
{
return ts->tv_sec > WATCHDOG_REALTIME_MAX_SECONDS;
}
RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Realtime_from_seconds(
uint32_t seconds
)
@@ -308,16 +334,13 @@ RTEMS_INLINE_ROUTINE uint64_t _Watchdog_Realtime_from_timespec(
const struct timespec *ts
)
{
/*
* The seconds are in time_t which is a signed integer. Thus this cast is
* subject to the year 2038 problem in case time_t is a 32-bit integer.
*/
uint64_t ticks = (uint64_t) ts->tv_sec;
uint64_t ticks;
_Assert( ticks < 0x400000000 );
_Assert( ts->tv_nsec >= 0 );
_Assert( ts->tv_nsec < 1000000000 );
_Assert( _Watchdog_Is_valid_timespec( ts ) );
_Assert( ts->tv_sec >= 0 );
_Assert( !_Watchdog_Is_far_future_realtime_timespec( ts ) );
ticks = (uint64_t) ts->tv_sec;
ticks <<= WATCHDOG_BITS_FOR_1E9_NANOSECONDS;
ticks |= (uint32_t) ts->tv_nsec;