diff options
Diffstat (limited to 'c/src/exec/posix/src/clockgettime.c')
-rw-r--r-- | c/src/exec/posix/src/clockgettime.c | 65 |
1 files changed, 65 insertions, 0 deletions
diff --git a/c/src/exec/posix/src/clockgettime.c b/c/src/exec/posix/src/clockgettime.c new file mode 100644 index 0000000000..806a29caa3 --- /dev/null +++ b/c/src/exec/posix/src/clockgettime.c @@ -0,0 +1,65 @@ +/* + * $Id$ + */ + +#include <assert.h> +#include <time.h> +#include <errno.h> + +#include <rtems/system.h> +#include <rtems/score/isr.h> +#include <rtems/score/thread.h> +#include <rtems/score/tod.h> + +#include <rtems/posix/seterr.h> +#include <rtems/posix/time.h> + +/*PAGE + * + * 14.2.1 Clocks, P1003.1b-1993, p. 263 + */ + +int clock_gettime( + clockid_t clock_id, + struct timespec *tp +) +{ + ISR_Level level; + time_t seconds; + long ticks; + + if ( !tp ) + set_errno_and_return_minus_one( EINVAL ); + + switch ( clock_id ) { + + case CLOCK_REALTIME: + + _ISR_Disable( level ); + seconds = _TOD_Seconds_since_epoch; + ticks = _TOD_Current.ticks; + _ISR_Enable( level ); + + tp->tv_sec = seconds + POSIX_TIME_SECONDS_1970_THROUGH_1988; + tp->tv_nsec = ticks * _TOD_Microseconds_per_tick * + TOD_NANOSECONDS_PER_MICROSECOND; + break; + +#ifdef _POSIX_CPUTIME + case CLOCK_PROCESS_CPUTIME: + /* don't base this on _Watchdog_Ticks_since_boot--duration is too short*/ + return POSIX_NOT_IMPLEMENTED(); + break; +#endif + +#ifdef _POSIX_THREAD_CPUTIME + case CLOCK_THREAD_CPUTIME: + return POSIX_NOT_IMPLEMENTED(); + break; +#endif + default: + set_errno_and_return_minus_one( EINVAL ); + + } + return 0; +} |