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// $Id$
#include "tao/orbconf.h"
#include "Direct_Priority_Mapping.h"
#include "ace/Sched_Params.h"
#if !defined (__ACE_INLINE__)
# include "Direct_Priority_Mapping.i"
#endif /* ! __ACE_INLINE__ */
ACE_RCSID(Strategies, Direct_Priority_Mapping, "$Id$")
TAO_Direct_Priority_Mapping::TAO_Direct_Priority_Mapping (int policy)
: policy_ (policy)
{
// We have special behavior for SUNs. This is because the results
// from ACE_Sched_Params::priority_min() and
// ACE_Sched_Params::priority_max() are not correct.
#if defined (sun)
ACE_utsname name;
ACE_OS::uname (&name);
// If we are on Solaris 5.7.
if (ACE_OS::strcmp (name.release, "5.7") == 0)
{
if (policy == ACE_SCHED_OTHER)
{
this->min_ = 0;
this->max_ = 127;
}
else
{
this->min_ = 0;
this->max_ = 59;
}
}
// If we are on Solaris 5.8.
else if (ACE_OS::strcmp (name.release, "5.8") == 0)
{
if (policy == ACE_SCHED_OTHER)
{
this->min_ = -20;
this->max_ = 127;
}
else
{
this->min_ = 0;
this->max_ = 59;
}
}
// Not sure about the other SUN releases. Therefore, lets stick to
// the default behavior.
else
{
this->min_ = ACE_Sched_Params::priority_min (this->policy_);
this->max_ = ACE_Sched_Params::priority_max (this->policy_);
}
#else /* sun */
// Other platforms should be ok.
this->min_ = ACE_Sched_Params::priority_min (this->policy_);
this->max_ = ACE_Sched_Params::priority_max (this->policy_);
#endif /* sun */
}
TAO_Direct_Priority_Mapping::~TAO_Direct_Priority_Mapping (void)
{
}
CORBA::Boolean
TAO_Direct_Priority_Mapping::to_native (RTCORBA::Priority corba_priority,
RTCORBA::NativePriority &native_priority)
{
if (corba_priority < 0)
return 0;
#if defined (ACE_WIN32)
int current_native_priority = this->min_;
int next_native_priority;
for (int i = 1; i <= corba_priority; ++i)
{
next_native_priority =
ACE_Sched_Params::next_priority (this->policy_,
current_native_priority);
if (next_native_priority == current_native_priority)
return 0;
current_native_priority = next_native_priority;
}
native_priority = current_native_priority;
return 1;
#else
if (this->min_ < this->max_)
{
native_priority = corba_priority + this->min_;
if (native_priority > this->max_)
return 0;
}
else if (this->min_ > this->max_)
{
native_priority = this->min_ - corba_priority;
if (native_priority < this->max_)
return 0;
}
else
{
// There is only one native priority.
if (corba_priority != 0)
return 0;
native_priority = this->min_;
}
return 1;
#endif /* ACE_WIN32 */
}
CORBA::Boolean
TAO_Direct_Priority_Mapping::to_CORBA (RTCORBA::NativePriority native_priority,
RTCORBA::Priority &corba_priority)
{
#if defined (ACE_WIN32)
int current_native_priority = this->min_;
for (corba_priority = 0; ; ++corba_priority)
{
if (current_native_priority == native_priority)
return 1;
else if (current_native_priority == this->max_)
return 0;
else
current_native_priority =
ACE_Sched_Params::next_priority (this->policy_,
current_native_priority);
}
#else
if (this->min_ < this->max_)
{
if (native_priority < this->min_
|| native_priority > this->max_)
return 0;
corba_priority = native_priority - this->min_;
}
else if (this->min_ > this->max_)
{
if (native_priority > this->min_
|| native_priority < this->max_)
return 0;
corba_priority = this->min_ - native_priority;
}
else if (this->min_ == this->max_)
{
if (native_priority != this->min_)
return 0;
corba_priority = 0;
}
return 1;
#endif /* ACE_WIN32 */
}
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