/*
* $Id$
*/
#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>
/*
* Seconds from January 1, 1970 to January 1, 1988. Used to account for
* differences between POSIX API and RTEMS core.
*/
#define POSIX_TIME_SECONDS_1970_THROUGH_1988 \
(((1987 - 1970 + 1) * TOD_SECONDS_PER_NON_LEAP_YEAR) + \
(4 * TOD_SECONDS_PER_DAY))
/*
* _POSIX_Time_Spec_to_interval
*/
Watchdog_Interval _POSIX_Time_Spec_to_interval(
const struct timespec *time
)
{
Watchdog_Interval ticks;
ticks = (time->tv_sec * TOD_MICROSECONDS_PER_SECOND) /
_TOD_Microseconds_per_tick;
ticks += (time->tv_nsec / TOD_NANOSECONDS_PER_MICROSECOND) /
_TOD_Microseconds_per_tick;
return ticks;
}
/*
* 4.5.1 Get System Time, P1003.1b-1993, p. 91
*/
time_t time(
time_t *tloc
)
{
time_t seconds_since_epoch;
if ( !_TOD_Is_set() ) {
errno = EINVAL;
return -1;
}
/*
* Internally the RTEMS epoch is 1988. This must be taken into account.
*/
seconds_since_epoch = _TOD_Seconds_since_epoch;
seconds_since_epoch += POSIX_TIME_SECONDS_1970_THROUGH_1988;
if ( tloc )
*tloc = seconds_since_epoch;
return seconds_since_epoch;
}
/*
* 14.2.1 Clocks, P1003.1b-1993, p. 263
*/
int clock_settime(
clockid_t clock_id,
const struct timespec *tp
)
{
struct tm split_time;
TOD_Control tod;
Watchdog_Interval seconds;
assert( tp );
switch ( clock_id ) {
case CLOCK_REALTIME:
(void) gmtime_r( &tp->tv_sec, &split_time );
/*
* Convert the tm structure format to that used by the TOD Handler
*
* NOTE: TOD Handler does not honor leap seconds.
*/
tod.year = split_time.tm_year + 1900; /* RHS is years since 1900 */
tod.month = split_time.tm_mon + 1; /* RHS uses 0-11 */
tod.day = split_time.tm_mday;
tod.hour = split_time.tm_hour;
tod.minute = split_time.tm_min;
tod.second = split_time.tm_sec; /* RHS allows 0-61 for leap seconds */
tod.ticks = (tp->tv_nsec / TOD_NANOSECONDS_PER_MICROSECOND) /
_TOD_Microseconds_per_tick;
if ( !_TOD_Validate( &tod ) ) {
errno = EINVAL;
return -1;
}
/*
* We can't use the tp->tv_sec field because it is based on
* a different EPOCH.
*/
seconds = _TOD_To_seconds( &tod );
_Thread_Disable_dispatch();
_TOD_Set( &tod, seconds );
_Thread_Enable_dispatch();
break;
#ifdef _POSIX_CPUTIME
case CLOCK_PROCESS_CPUTIME:
return POSIX_NOT_IMPLEMENTED();
break;
#endif
#ifdef _POSIX_THREAD_CPUTIME
case CLOCK_THREAD_CPUTIME:
return POSIX_NOT_IMPLEMENTED();
break;
#endif
default:
errno = EINVAL;
return -1;
}
return 0;
}
/*
* 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;
assert( tp );
switch ( clock_id ) {
case CLOCK_REALTIME:
if ( !_TOD_Is_set() ) { /* XXX does posix allow it to not be set? */
errno = EINVAL;
return -1;
}
_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:
/* could base this on _TOD_Ticks_since_boot -- must make set work though*/
return POSIX_NOT_IMPLEMENTED();
break;
#endif
#ifdef _POSIX_THREAD_CPUTIME
case CLOCK_THREAD_CPUTIME:
return POSIX_NOT_IMPLEMENTED();
break;
#endif
default:
errno = EINVAL;
return -1;
}
return 0;
}
/*
* 14.2.1 Clocks, P1003.1b-1993, p. 263
*/
int clock_getres(
clockid_t clock_id,
struct timespec *res
)
{
switch ( clock_id ) {
/*
* All time in rtems is based on the same clock tick.
*/
case CLOCK_REALTIME:
case CLOCK_PROCESS_CPUTIME:
case CLOCK_THREAD_CPUTIME:
if ( res ) {
res->tv_sec = _TOD_Microseconds_per_tick / TOD_MICROSECONDS_PER_SECOND;
res->tv_nsec =
(_TOD_Microseconds_per_tick % TOD_MICROSECONDS_PER_SECOND) *
TOD_NANOSECONDS_PER_MICROSECOND;
}
break;
default:
errno = EINVAL;
return -1;
}
return 0;
}
/*
* 14.2.2 Create a Per-Process Timer, P1003.1b-1993, p. 264
*/
int timer_create(
clockid_t clock_id,
struct sigevent *evp,
timer_t *timerid
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 14.2.3 Delete a Per_process Timer, P1003.1b-1993, p. 266
*/
int timer_delete(
timer_t timerid
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267
*/
int timer_settime(
timer_t timerid,
int flags,
const struct itimerspec *value,
struct itimerspec *ovalue
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267
*/
int timer_gettime(
timer_t timerid,
struct itimerspec *value
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 14.2.4 Per-Process Timers, P1003.1b-1993, p. 267
*/
int timer_getoverrun(
timer_t timerid
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 14.2.5 High Resolution Sleep, P1003.1b-1993, p. 269
*/
int nanosleep(
const struct timespec *rqtp,
struct timespec *rmtp
)
{
Watchdog_Interval ticks;
/* XXX this is interruptible by a posix signal */
/* XXX rmtp is the time remaining on the timer -- we do not support this */
/* XXX rmtp may be NULL */
ticks = _POSIX_Time_Spec_to_interval( rqtp );
_Thread_Disable_dispatch();
_Thread_Set_state( _Thread_Executing, STATES_WAITING_FOR_TIME );
_Watchdog_Initialize(
&_Thread_Executing->Timer,
_Thread_Delay_ended, /* XXX may need to be POSIX specific */
_Thread_Executing->Object.id,
NULL
);
_Watchdog_Insert_ticks( &_Thread_Executing->Timer, ticks );
_Thread_Enable_dispatch();
return 0; /* XXX should account for signal/remaining */
}
/*
* 20.1.3 Accessing a Process CPU-time CLock, P1003.4b/D8, p. 55
*/
int clock_getcpuclockid(
pid_t pid,
clockid_t *clock_id
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 20.1.5 CPU-time Clock Attribute Access, P1003.4b/D8, p. 58
*/
int clock_setenable_attr(
clockid_t clock_id,
int attr
)
{
return POSIX_NOT_IMPLEMENTED();
}
/*
* 20.1.5 CPU-time Clock Attribute Access, P1003.4b/D8, p. 58
*/
int clock_getenable_attr(
clockid_t clock_id,
int *attr
)
{
return POSIX_NOT_IMPLEMENTED();
}
