score: Introduce CPU budget operations

This patch set replaces the CPU budget algorithm enumeration with a set of CPU
budget operations which implement a particular CPU budget algorithm.  This
helps to hide the CPU budget algorithm implementation details from the general
thread handling.  The CPU budget callouts are turned into CPU budget
operations.  This slightly reduces the size of the thread control block.

All schedulers used the default scheduler tick implementation.  The tick
scheduler operation is removed and the CPU budget operations are directly used
in _Watchdog_Tick() if the executing thread uses a CPU budget algorithm.  This
is performance improvement for all threads which do not use a CPU budget
algorithm (default behaviour).

1 files changed, 8 insertions, 8 deletions

diff --git a/cpukit/posix/src/pthreadgetattrnp.c b/cpukit/posix/src/pthreadgetattrnp.c
index 5572fb98a5..aa34185264 100644
--- a/cpukit/posix/src/pthreadgetattrnp.c
+++ b/cpukit/posix/src/pthreadgetattrnp.c
@@ -37,12 +37,12 @@ int pthread_getattr_np(
   pthread_attr_t *attr
 )
 {
-  Thread_Control               *the_thread;
-  ISR_lock_Context              lock_context;
-  Thread_CPU_budget_algorithms  budget_algorithm;
-  const Scheduler_Control      *scheduler;
-  Priority_Control              priority;
-  Status_Control                status;
+  Thread_Control                     *the_thread;
+  ISR_lock_Context                    lock_context;
+  const Thread_CPU_budget_operations *cpu_budget_operations;
+  const Scheduler_Control            *scheduler;
+  Priority_Control                    priority;
+  Status_Control                      status;
 
   if ( attr == NULL ) {
     return EINVAL;
@@ -89,7 +89,7 @@ int pthread_getattr_np(
     attr->affinityset
   );
 
-  budget_algorithm = the_thread->budget_algorithm;
+  cpu_budget_operations = the_thread->CPU_budget.operations;
 
   _Thread_State_release( the_thread, &lock_context );
 
@@ -101,7 +101,7 @@ int pthread_getattr_np(
     priority
   );
   attr->schedpolicy =
-    _POSIX_Thread_Translate_to_sched_policy( budget_algorithm );
+    _POSIX_Thread_Translate_to_sched_policy( cpu_budget_operations );
 
   return _POSIX_Get_error( status );
 }