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[/] [openrisc/] [trunk/] [rtos/] [rtems/] [c/] [src/] [exec/] [posix/] [src/] [sched.c] - Blame information for rev 173

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1 30 unneback 
/*
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 *  $Id: sched.c,v 1.2 2001-09-27 11:59:17 chris Exp $
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 */
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#include <assert.h>
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#include <sched.h>
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#include <errno.h>
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#include <rtems/system.h>
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#include <rtems/score/tod.h>
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#include <rtems/score/thread.h>
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#include <rtems/posix/seterr.h>
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#include <rtems/posix/priority.h>
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#include <rtems/posix/time.h>
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/*PAGE
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 *
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 *  13.3.1 Set Scheduling Parameters, P1003.1b-1993, p. 252
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 *
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 */
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int sched_setparam(
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  pid_t                     pid,
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  const struct sched_param *param
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)
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{
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  set_errno_and_return_minus_one( ENOSYS );
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}
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/*PAGE
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 *
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 *  13.3.2 Set Scheduling Parameters, P1003.1b-1993, p. 253
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 */
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int sched_getparam(
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  pid_t                     pid,
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  const struct sched_param *param
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)
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{
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  set_errno_and_return_minus_one( ENOSYS );
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}
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/*PAGE
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 *
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 *  13.3.3 Set Scheduling Policy and Scheduling Parameters,
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 *         P1003.1b-1993, p. 254
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 */
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int sched_setscheduler(
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  pid_t                     pid,
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  int                       policy,
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  const struct sched_param *param
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)
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{
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  set_errno_and_return_minus_one( ENOSYS );
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}
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/*PAGE
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 *
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 *  13.3.4 Get Scheduling Policy, P1003.1b-1993, p. 256
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 */
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int sched_getscheduler(
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  pid_t                     pid
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)
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{
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  set_errno_and_return_minus_one( ENOSYS );
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}
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/*PAGE
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 *
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 *  13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258
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 */
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int sched_get_priority_max(
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  int  policy
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)
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{
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  switch ( policy ) {
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    case SCHED_OTHER:
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    case SCHED_FIFO:
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    case SCHED_RR:
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    case SCHED_SPORADIC:
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      break;
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    default:
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      set_errno_and_return_minus_one( EINVAL );
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  }
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  return POSIX_SCHEDULER_MAXIMUM_PRIORITY;
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}
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/*PAGE
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 *
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 *  13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258
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 */
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int sched_get_priority_min(
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  int  policy
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)
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{
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  switch ( policy ) {
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    case SCHED_OTHER:
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    case SCHED_FIFO:
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    case SCHED_RR:
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    case SCHED_SPORADIC:
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      break;
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    default:
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      set_errno_and_return_minus_one( EINVAL );
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  }
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  return POSIX_SCHEDULER_MINIMUM_PRIORITY;
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}
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/*PAGE
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 *
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 *  13.3.6 Get Scheduling Parameter Limits, P1003.1b-1993, p. 258
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 */
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int sched_rr_get_interval(
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  pid_t             pid,
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  struct timespec  *interval
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)
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{
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  /* XXX do we need to support different time quantums per thread */
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  /*
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   *  Only supported for the "calling process" (i.e. this node).
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   */
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  if ( pid && pid != getpid() )
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    set_errno_and_return_minus_one( ESRCH );
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  if ( !interval )
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    set_errno_and_return_minus_one( EINVAL );
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  _POSIX_Interval_to_timespec( _Thread_Ticks_per_timeslice, interval );
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  return 0;
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}
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/*PAGE
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 *
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 *  13.3.5 Yield Processor, P1003.1b-1993, p. 257
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 */
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int sched_yield( void )
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{
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  _Thread_Disable_dispatch();
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    _Thread_Yield_processor();
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  _Thread_Enable_dispatch();
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  return 0;
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}

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