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// $Id$
#include "tao/RTCORBA/Continuous_Priority_Mapping.h"
#if defined (TAO_HAS_CORBA_MESSAGING) && TAO_HAS_CORBA_MESSAGING != 0
#include "ace/Sched_Params.h"
ACE_RCSID(RTCORBA, Continuous_Priority_Mapping, "$Id$")
TAO_BEGIN_VERSIONED_NAMESPACE_DECL
TAO_Continuous_Priority_Mapping::TAO_Continuous_Priority_Mapping (int policy)
: policy_ (policy)
, min_ (ACE_Sched_Params::priority_min (this->policy_))
, max_ (ACE_Sched_Params::priority_max (this->policy_))
{
}
TAO_Continuous_Priority_Mapping::~TAO_Continuous_Priority_Mapping (void)
{
}
CORBA::Boolean
TAO_Continuous_Priority_Mapping::to_native (RTCORBA::Priority corba_priority,
RTCORBA::NativePriority &native_priority)
{
if (corba_priority < 0)
return false;
#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 false;
current_native_priority = next_native_priority;
}
native_priority = static_cast<RTCORBA::NativePriority> (current_native_priority);
return true;
#else
if (this->min_ < this->max_)
{
native_priority = corba_priority + this->min_;
if (native_priority > this->max_)
return false;
}
else if (this->min_ > this->max_)
{
native_priority = this->min_ - corba_priority;
if (native_priority < this->max_)
return false;
}
else
{
// There is only one native priority.
if (corba_priority != 0)
return false;
native_priority = this->min_;
}
return true;
#endif /* ACE_WIN32 */
}
CORBA::Boolean
TAO_Continuous_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 true;
else if (current_native_priority == this->max_)
return false;
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 false;
corba_priority = native_priority - this->min_;
}
else if (this->min_ > this->max_)
{
if (native_priority > this->min_
|| native_priority < this->max_)
return false;
corba_priority = this->min_ - native_priority;
}
else if (this->min_ == this->max_)
{
if (native_priority != this->min_)
return false;
corba_priority = 0;
}
return true;
#endif /* ACE_WIN32 */
}
TAO_END_VERSIONED_NAMESPACE_DECL
#endif /* TAO_HAS_CORBA_MESSAGING && TAO_HAS_CORBA_MESSAGING != 0 */
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