ACE_Sched_Priority_Iterator Class Reference

An iterator over the OS-defined scheduling priorities. More...

#include <Sched_Params.h>

List of all members.

Public Member Functions

 ACE_Sched_Priority_Iterator (const ACE_Sched_Params::Policy &policy, int scope=ACE_SCOPE_THREAD)
 ~ACE_Sched_Priority_Iterator (void)
 Default dtor.
int more (void) const
 Check if there are more priorities.
int priority (void) const
 Return the current priority.
void next (void)
const ACE_Sched_Params::Policypolicy (void) const
 Accessor for the scheduling policy over which we are iterating.
int scope (void) const
 Accessor for the scheduling.

Private Attributes

ACE_Sched_Params::Policy policy_
int scope_
int priority_
 The current priority.
int done_


Detailed Description

An iterator over the OS-defined scheduling priorities.

The order of priorities (numeric value vs. importance) is OS dependant, it can be the case that the priorities are not even contigous. This class permits iteration over priorities using the iterator pattern.

Definition at line 181 of file Sched_Params.h.


Constructor & Destructor Documentation

ACE_INLINE ACE_Sched_Priority_Iterator::ACE_Sched_Priority_Iterator ( const ACE_Sched_Params::Policy policy,
int  scope = ACE_SCOPE_THREAD 
)

Initialize the iterator, the arguments define the scheduling policy and scope for the priorities (see ACE_Sched_Param).

Definition at line 94 of file Sched_Params.inl.

References priority_, ACE_Sched_Params::priority_min(), and scope().

00096  : policy_ (policy),
00097    scope_ (scope),
00098    priority_ (0),
00099    done_ (0)
00100 {
00101   priority_ = ACE_Sched_Params::priority_min (this->policy (), this->scope ());
00102 }

ACE_INLINE ACE_Sched_Priority_Iterator::~ACE_Sched_Priority_Iterator ( void   ) 

Default dtor.

Definition at line 105 of file Sched_Params.inl.

00106 {
00107 }


Member Function Documentation

ACE_INLINE int ACE_Sched_Priority_Iterator::more ( void   )  const

Check if there are more priorities.

Definition at line 110 of file Sched_Params.inl.

References done_.

00111 {
00112   return !this->done_;
00113 }

ACE_INLINE void ACE_Sched_Priority_Iterator::next ( void   ) 

Move to the next priority. The iteration is from lowest to highest importance.

Definition at line 122 of file Sched_Params.inl.

References done_, ACE_Sched_Params::next_priority(), priority(), priority_, and scope().

00123 {
00124   if (this->done_)
00125     return;
00126 
00127   int old_priority = this->priority_;
00128   priority_ = ACE_Sched_Params::next_priority (this->policy (),
00129                                                this->priority (),
00130                                                this->scope ());
00131   this->done_ = old_priority == priority_;
00132 }

ACE_INLINE const ACE_Sched_Params::Policy & ACE_Sched_Priority_Iterator::policy ( void   )  const

Accessor for the scheduling policy over which we are iterating.

Definition at line 82 of file Sched_Params.inl.

References policy_.

00083 {
00084   return this->policy_;
00085 }

ACE_INLINE int ACE_Sched_Priority_Iterator::priority ( void   )  const

Return the current priority.

Definition at line 116 of file Sched_Params.inl.

References priority_.

Referenced by next().

00117 {
00118   return this->priority_;
00119 }

ACE_INLINE int ACE_Sched_Priority_Iterator::scope ( void   )  const

Accessor for the scheduling.

Definition at line 88 of file Sched_Params.inl.

References scope_.

Referenced by ACE_Sched_Priority_Iterator(), and next().

00089 {
00090   return this->scope_;
00091 }


Member Data Documentation

int ACE_Sched_Priority_Iterator::done_ [private]

This is set to 1 when there are no more priorities. Cannot easily compare against the highest priority on platforms were priorities are non-contigous or descending.

Definition at line 222 of file Sched_Params.h.

Referenced by more(), and next().

ACE_Sched_Params::Policy ACE_Sched_Priority_Iterator::policy_ [private]

The Scheduling policy (FIFO, RR, etc.) and scheduling scope (PROCESS, SYSTEM) we are iterating on.

Definition at line 211 of file Sched_Params.h.

Referenced by policy().

int ACE_Sched_Priority_Iterator::priority_ [private]

The current priority.

Definition at line 215 of file Sched_Params.h.

Referenced by ACE_Sched_Priority_Iterator(), next(), and priority().

int ACE_Sched_Priority_Iterator::scope_ [private]

Definition at line 212 of file Sched_Params.h.

Referenced by scope().


The documentation for this class was generated from the following files:
Generated on Tue Feb 2 17:35:32 2010 for ACE by  doxygen 1.4.7