score: Indroduce cancel job scheduler operation

Do not use a deadline value of zero to indicate a job cancellation.  Use
a dedicated scheduler operation for this.

1 files changed, 7 insertions, 1 deletions

diff --git a/cpukit/score/include/rtems/score/scheduleredf.h b/cpukit/score/include/rtems/score/scheduleredf.h
index de06344aa5..5d9b4359c4 100644
--- a/cpukit/score/include/rtems/score/scheduleredf.h
+++ b/cpukit/score/include/rtems/score/scheduleredf.h
@@ -61,6 +61,7 @@ extern "C" {
     _Scheduler_EDF_Node_initialize,  /* node initialize entry point */ \
     _Scheduler_default_Node_destroy, /* node destroy entry point */ \
     _Scheduler_EDF_Release_job,      /* new period of task */ \
+    _Scheduler_EDF_Cancel_job,       /* cancel period of task */ \
     _Scheduler_default_Tick,         /* tick entry point */ \
     _Scheduler_default_Start_idle    /* start idle entry point */ \
     SCHEDULER_OPERATION_DEFAULT_GET_SET_AFFINITY \
@@ -227,12 +228,17 @@ Scheduler_Void_or_thread _Scheduler_EDF_Yield(
  *             the job was cancelled or deleted, thus a running task
  *             has to be suspended.
  */
-void _Scheduler_EDF_Release_job (
+void _Scheduler_EDF_Release_job(
   const Scheduler_Control *scheduler,
   Thread_Control          *the_thread,
   uint64_t                 deadline
 );
 
+void _Scheduler_EDF_Cancel_job(
+  const Scheduler_Control *scheduler,
+  Thread_Control          *the_thread
+);
+
 #ifdef __cplusplus
 }
 #endif