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//=============================================================================
/**
* @file Sched_Params.cpp
*
* @author David Levine
*/
//=============================================================================
#include "ace/Sched_Params.h"
#if !defined (__ACE_INLINE__)
#include "ace/Sched_Params.inl"
#endif /* __ACE_INLINE__ */
ACE_BEGIN_VERSIONED_NAMESPACE_DECL
int
ACE_Sched_Params::priority_min (const Policy policy,
const int scope)
{
#if defined(ACE_HAS_PTHREADS) && !defined(ACE_LACKS_SETSCHED)
switch (scope)
{
case ACE_SCOPE_THREAD:
switch (policy)
{
case ACE_SCHED_FIFO:
return ACE_THR_PRI_FIFO_MIN;
case ACE_SCHED_RR:
return ACE_THR_PRI_RR_MIN;
case ACE_SCHED_OTHER:
default:
return ACE_THR_PRI_OTHER_MIN;
}
case ACE_SCOPE_PROCESS:
default:
switch (policy)
{
case ACE_SCHED_FIFO:
return ACE_PROC_PRI_FIFO_MIN;
case ACE_SCHED_RR:
return ACE_PROC_PRI_RR_MIN;
case ACE_SCHED_OTHER:
default:
return ACE_PROC_PRI_OTHER_MIN;
}
}
#elif defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
return THREAD_PRIORITY_IDLE;
#elif defined (ACE_VXWORKS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
# if defined (VX_TASK_PRIORITY_MAX)
return VX_TASK_PRIORITY_MAX;
# else
return 255;
# endif
#else
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_PTHREADS */
}
int
ACE_Sched_Params::priority_max (const Policy policy,
const int scope)
{
#if defined(ACE_HAS_PTHREADS) && \
(!defined(ACE_LACKS_SETSCHED) || \
defined (ACE_HAS_PTHREAD_SCHEDPARAM))
switch (scope)
{
case ACE_SCOPE_THREAD:
switch (policy)
{
case ACE_SCHED_FIFO:
return ACE_THR_PRI_FIFO_MAX;
case ACE_SCHED_RR:
return ACE_THR_PRI_RR_MAX;
case ACE_SCHED_OTHER:
default:
return ACE_THR_PRI_OTHER_MAX;
}
case ACE_SCOPE_PROCESS:
default:
switch (policy)
{
case ACE_SCHED_FIFO:
return ACE_PROC_PRI_FIFO_MAX;
case ACE_SCHED_RR:
return ACE_PROC_PRI_RR_MAX;
case ACE_SCHED_OTHER:
default:
return ACE_PROC_PRI_OTHER_MAX;
}
}
#elif defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
return THREAD_PRIORITY_TIME_CRITICAL;
#elif defined (ACE_VXWORKS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
# if defined (VX_TASK_PRIORITY_MIN)
return VX_TASK_PRIORITY_MIN;
# else
return 0;
# endif
#else
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_PTHREADS */
}
int
ACE_Sched_Params::next_priority (const Policy policy,
const int priority,
const int scope)
{
#if defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
switch (priority)
{
case THREAD_PRIORITY_IDLE:
return THREAD_PRIORITY_LOWEST;
case THREAD_PRIORITY_LOWEST:
return THREAD_PRIORITY_BELOW_NORMAL;
case THREAD_PRIORITY_BELOW_NORMAL:
return THREAD_PRIORITY_NORMAL;
case THREAD_PRIORITY_NORMAL:
return THREAD_PRIORITY_ABOVE_NORMAL;
case THREAD_PRIORITY_ABOVE_NORMAL:
return THREAD_PRIORITY_HIGHEST;
case THREAD_PRIORITY_HIGHEST:
return THREAD_PRIORITY_TIME_CRITICAL;
case THREAD_PRIORITY_TIME_CRITICAL:
return THREAD_PRIORITY_TIME_CRITICAL;
default:
return priority; // unknown priority: should never get here
}
#elif defined(ACE_HAS_THREADS) && \
(!defined(ACE_LACKS_SETSCHED) || \
defined (ACE_HAS_PTHREAD_SCHEDPARAM))
// including STHREADS, and PTHREADS
int const max = priority_max (policy, scope);
return priority < max ? priority + 1 : max;
#elif defined (ACE_VXWORKS)
int const max = priority_max (policy, scope);
return priority > max ? priority - 1 : max;
#else
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
ACE_UNUSED_ARG (priority);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}
int
ACE_Sched_Params::previous_priority (const Policy policy,
const int priority,
const int scope)
{
#if defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
switch (priority)
{
case THREAD_PRIORITY_IDLE:
return THREAD_PRIORITY_IDLE;
case THREAD_PRIORITY_LOWEST:
return THREAD_PRIORITY_IDLE;
case THREAD_PRIORITY_BELOW_NORMAL:
return THREAD_PRIORITY_LOWEST;
case THREAD_PRIORITY_NORMAL:
return THREAD_PRIORITY_BELOW_NORMAL;
case THREAD_PRIORITY_ABOVE_NORMAL:
return THREAD_PRIORITY_NORMAL;
case THREAD_PRIORITY_HIGHEST:
return THREAD_PRIORITY_ABOVE_NORMAL;
case THREAD_PRIORITY_TIME_CRITICAL:
return THREAD_PRIORITY_HIGHEST;
default:
return priority; // unknown priority: should never get here
}
#elif defined(ACE_HAS_THREADS) && \
(!defined(ACE_LACKS_SETSCHED) || \
defined (ACE_HAS_PTHREAD_SCHEDPARAM))
// including STHREADS and PTHREADS
int const min = priority_min (policy, scope);
return priority > min ? priority - 1 : min;
#elif defined (ACE_VXWORKS)
int const min = priority_min (policy, scope);
return priority < min ? priority + 1 : min;
#else
ACE_UNUSED_ARG (policy);
ACE_UNUSED_ARG (scope);
ACE_UNUSED_ARG (priority);
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}
ACE_END_VERSIONED_NAMESPACE_DECL
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