posix: sched_get_priority_max()

Enable for all configurations since it pulls in no additional
dependencies.  Return value of the scheduler instance of the executing
thread.

1 files changed, 10 insertions, 2 deletions

diff --git a/cpukit/posix/src/sched_getprioritymax.c b/cpukit/posix/src/sched_getprioritymax.c
index cde9eb9466..94114e3b84 100644
--- a/cpukit/posix/src/sched_getprioritymax.c
+++ b/cpukit/posix/src/sched_getprioritymax.c
@@ -25,12 +25,14 @@
 
 #include <rtems/system.h>
 #include <rtems/seterr.h>
-#include <rtems/posix/priorityimpl.h>
+#include <rtems/score/schedulerimpl.h>
 
 int sched_get_priority_max(
   int  policy
 )
 {
+  const Scheduler_Control *scheduler;
+
   switch ( policy ) {
     case SCHED_OTHER:
     case SCHED_FIFO:
@@ -42,5 +44,11 @@ int sched_get_priority_max(
       rtems_set_errno_and_return_minus_one( EINVAL );
   }
 
-  return POSIX_SCHEDULER_MAXIMUM_PRIORITY;
+  scheduler = _Scheduler_Get_own( _Thread_Get_executing() );
+
+  if ( scheduler->maximum_priority > INT_MAX ) {
+    return INT_MAX;
+  }
+
+  return (int) scheduler->maximum_priority - 1;
 }