Fix after this report from Peter Pointner <pr@schenk.isar.de>:

Problem: a posix thread which is created by

      pthread_attr_init(&tattr);
      pthread_attr_setinheritsched(&tattr, PTHREAD_EXPLICIT_SCHED);
      pthread_attr_setschedpolicy(&tattr, SCHED_RR);
      pthread_create(&th, &tattr, func, arg);

    has a first timeslice of 2^32 ticks (changing a running thread to
    SCHED_RR id ok).

    I use RTEMS-4.0.0. I am not sure if the problem exists in the current CVS
    head revision. If it's not fixed, the patch at the end should do it.

Peter


--- pthreadcreate.c.orig        Wed Jul 28 14:45:58 1999
+++ pthreadcreate.c     Wed Jul 28 15:06:09 1999
@@ -199,6 +199,10 @@
   api->schedpolicy = schedpolicy;
   api->schedparam  = schedparam;

+  if ( schedpolicy == SCHED_RR ) {
+    the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+  }
+
   /*
    *  This insures we evaluate the process-wide signals pending when we
    *  first run.

c/src/exec/score/src/threadinitialize.c

@@ -137,6 +137,18 @@ boolean _Thread_Initialize(
   the_thread->Start.is_preemptible   = is_preemptible;
   the_thread->Start.budget_algorithm = budget_algorithm;
   the_thread->Start.budget_callout   = budget_callout;
+
+  switch ( budget_algorithm ) {
+    case THREAD_CPU_BUDGET_ALGORITHM_NONE:
+    case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE:
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE:
+      the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT:
+      break;
+  }
+
   the_thread->Start.isr_level        = isr_level;
 
   the_thread->current_state          = STATES_DORMANT;

cpukit/score/src/threadinitialize.c

@@ -137,6 +137,18 @@ boolean _Thread_Initialize(
   the_thread->Start.is_preemptible   = is_preemptible;
   the_thread->Start.budget_algorithm = budget_algorithm;
   the_thread->Start.budget_callout   = budget_callout;
+
+  switch ( budget_algorithm ) {
+    case THREAD_CPU_BUDGET_ALGORITHM_NONE:
+    case THREAD_CPU_BUDGET_ALGORITHM_RESET_TIMESLICE:
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_EXHAUST_TIMESLICE:
+      the_thread->cpu_time_budget = _Thread_Ticks_per_timeslice;
+      break;
+    case THREAD_CPU_BUDGET_ALGORITHM_CALLOUT:
+      break;
+  }
+
   the_thread->Start.isr_level        = isr_level;
 
   the_thread->current_state          = STATES_DORMANT;