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/**
* @file
*
* @ingroup POSIX_PTHREAD Private POSIX Threads
*
* @brief Translate sched_param into SuperCore Terms
*/
/*
* 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.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <pthread.h>
#include <errno.h>
#include <rtems/posix/pthreadimpl.h>
int _POSIX_Thread_Translate_to_sched_policy(
Thread_CPU_budget_algorithms budget_algorithm
)
{
switch ( budget_algorithm ) {
case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE:
return SCHED_OTHER;
case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE:
return SCHED_RR;
case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT:
return SCHED_SPORADIC;
default:
_Assert( budget_algorithm == THREAD_CPU_BUDGET_ALGORITHM_NONE );
return SCHED_FIFO;
}
}
int _POSIX_Thread_Translate_sched_param(
int policy,
const struct sched_param *param,
Thread_CPU_budget_algorithms *budget_algorithm,
Thread_CPU_budget_algorithm_callout *budget_callout
)
{
*budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
*budget_callout = NULL;
if ( policy == SCHED_OTHER ) {
*budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE;
return 0;
}
if ( policy == SCHED_FIFO ) {
*budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_NONE;
return 0;
}
if ( policy == SCHED_RR ) {
*budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE;
return 0;
}
#if defined(RTEMS_POSIX_API)
if ( policy == SCHED_SPORADIC ) {
if ( (param->sched_ss_repl_period.tv_sec == 0) &&
(param->sched_ss_repl_period.tv_nsec == 0) )
return EINVAL;
if ( (param->sched_ss_init_budget.tv_sec == 0) &&
(param->sched_ss_init_budget.tv_nsec == 0) )
return EINVAL;
if ( _Timespec_To_ticks( ¶m->sched_ss_repl_period ) <
_Timespec_To_ticks( ¶m->sched_ss_init_budget ) )
return EINVAL;
*budget_algorithm = THREAD_CPU_BUDGET_ALGORITHM_CALLOUT;
*budget_callout = _POSIX_Threads_Sporadic_budget_callout;
return 0;
}
#endif
return EINVAL;
}
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