score: Simplify thread control initialization

The thread control block contains fields that point to application
configuration dependent memory areas, like the scheduler information,
the API control blocks, the user extension context table, the RTEMS
notepads and the Newlib re-entrancy support.  Account for these areas in
the configuration and avoid extra workspace allocations for these areas.

This helps also to avoid heap fragementation and reduces the per thread
memory due to a reduced heap allocation overhead.

1 files changed, 7 insertions, 13 deletions

diff --git a/cpukit/score/src/schedulercbsallocate.c b/cpukit/score/src/schedulercbsallocate.c
index 1190b84254..a6f89c35a9 100644
--- a/cpukit/score/src/schedulercbsallocate.c
+++ b/cpukit/score/src/schedulercbsallocate.c
@@ -25,24 +25,18 @@
 #include <rtems/score/schedulercbs.h>
 #include <rtems/score/wkspace.h>
 
-void *_Scheduler_CBS_Allocate(
+bool _Scheduler_CBS_Allocate(
   const Scheduler_Control *scheduler,
-  Thread_Control          *the_thread
+  Thread_Control    *the_thread
 )
 {
-  void *sched;
-  Scheduler_CBS_Per_thread *schinfo;
+  Scheduler_CBS_Per_thread *schinfo = the_thread->scheduler_info;
 
   (void) scheduler;
 
-  sched = _Workspace_Allocate(sizeof(Scheduler_CBS_Per_thread));
-  if ( sched ) {
-    the_thread->scheduler_info = sched;
-    schinfo = (Scheduler_CBS_Per_thread *)(the_thread->scheduler_info);
-    schinfo->edf_per_thread.thread = the_thread;
-    schinfo->edf_per_thread.queue_state = SCHEDULER_EDF_QUEUE_STATE_NEVER_HAS_BEEN;
-    schinfo->cbs_server = NULL;
-  }
+  schinfo->edf_per_thread.thread = the_thread;
+  schinfo->edf_per_thread.queue_state = SCHEDULER_EDF_QUEUE_STATE_NEVER_HAS_BEEN;
+  schinfo->cbs_server = NULL;
 
-  return sched;
+  return true;
 }