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// $Id$
// ============================================================================
//
// = LIBRARY
// ACE
//
// = FILENAME
// Sched_Params.cpp
//
// = CREATION DATE
// 28 January 1997
//
// = AUTHOR
// David Levine
//
// ============================================================================
#define ACE_BUILD_DLL
#include "ace/ACE.h"
#include "ace/Sched_Params.h"
#if !defined (__ACE_INLINE__)
#include "ace/Sched_Params.i"
#endif /* __ACE_INLINE__ */
#if defined (ACE_HAS_STHREADS)
#include <sys/rtpriocntl.h>
#include <sys/tspriocntl.h>
#endif /* ACE_HAS_STHREADS */
int
ACE_Sched_Params::priority_min (const Policy policy)
{
#if defined (ACE_HAS_STHREADS)
// Assume that ACE_SCHED_OTHER indicates Solaris TS class, and that
// other policies indicate Solaris RT class.
if (policy == ACE_SCHED_OTHER)
{
// Get the priority class ID and attributes.
pcinfo_t pcinfo;
ACE_OS::strcpy (pcinfo.pc_clname, "TS");
// The following is just to avoid Purify warnings about unitialized
// memory reads.
ACE_OS::memset (pcinfo.pc_clinfo, 0, PC_CLINFOSZ);
if (::priocntl (P_ALL /* ignored */,
P_MYID /* ignored */,
PC_GETCID,
(char *) &pcinfo) == -1)
{
return -1; // just hope that priority range wasn't configured
// from -1 .. 1
}
// OK, now we've got the class ID in pcinfo.pc_cid. In addition,
// the maximum configured real-time priority is in ((tsinfo_t *)
// pcinfo.pc_clinfo)->ts_maxupri.
return -((tsinfo_t *) pcinfo.pc_clinfo)->ts_maxupri;
}
else
{
return 0;
}
#elif defined (ACE_HAS_DCETHREADS) || defined(ACE_HAS_PTHREADS)
return ::sched_get_priority_min (policy);
#elif defined (ACE_HAS_WTHREADS)
return THREAD_PRIORITY_IDLE;
#elif defined (VXWORKS)
return 255;
#elif
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
}
int
ACE_Sched_Params::priority_max (const Policy policy)
{
#if defined (ACE_HAS_STHREADS)
// Assume that ACE_SCHED_OTHER indicates Solaris TS class, and that
// other policies indicate Solaris RT class.
// Get the priority class ID and attributes.
pcinfo_t pcinfo;
ACE_OS::strcpy (pcinfo.pc_clname,
policy == ACE_SCHED_OTHER ? "TS" : "RT");
// The following is just to avoid Purify warnings about unitialized
// memory reads.
ACE_OS::memset (pcinfo.pc_clinfo, 0, PC_CLINFOSZ);
if (::priocntl (P_ALL /* ignored */,
P_MYID /* ignored */,
PC_GETCID,
(char *) &pcinfo) == -1)
{
return -1;
}
// OK, now we've got the class ID in pcinfo.pc_cid. In addition,
// the maximum configured real-time priority is in ((rtinfo_t *)
// pcinfo.pc_clinfo)->rt_maxpri, or similarly for the TS class.
return policy == ACE_SCHED_OTHER
? ((tsinfo_t *) pcinfo.pc_clinfo)->ts_maxupri
: ((rtinfo_t *) pcinfo.pc_clinfo)->rt_maxpri;
#elif defined (ACE_HAS_DCETHREADS) || defined(ACE_HAS_PTHREADS)
return ::sched_get_priority_max (policy);
#elif defined (ACE_HAS_WTHREADS)
return THREAD_PRIORITY_TIME_CRITICAL;
#elif defined (VXWORKS)
return 0;
#elif
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_STHREADS */
}
int
ACE_Sched_Params::next_priority (const Policy policy, const int priority)
{
#if defined (VXWORKS)
ACE_UNUSED_ARG (policy);
return priority > priority_max (policy) ? priority - 1
: priority_max (policy);
#elif defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
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;
}
#elif defined (ACE_HAS_THREADS)
const int max = priority_max (policy);
return priority < max ? priority + 1 : max;
#elif
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}
int
ACE_Sched_Params::previous_priority (const Policy policy,
const int priority)
{
#if defined (VXWORKS)
ACE_UNUSED_ARG (policy);
return priority < priority_min (policy) ? priority + 1
: priority_min (policy);
#elif defined (ACE_HAS_WTHREADS)
ACE_UNUSED_ARG (policy);
switch (priority)
{
case THREAD_PRIORITY_IDLE:
return THREAD_PRIORITY_IDLE;
case THREAD_PRIORITY_IDLE:
return THREAD_PRIORITY_BELOW_NORMAL;
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;
}
#elif defined (ACE_HAS_THREADS)
const int min = priority_min (policy);
return priority > min ? priority - 1 : min;
#elif
ACE_NOTSUP_RETURN (-1);
#endif /* ACE_HAS_THREADS */
}
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