1 files changed, 55 insertions, 0 deletions
diff --git a/posix_api/psx_sched_report/psx_sched_report.c b/posix_api/psx_sched_report/psx_sched_report.c
new file mode 100644
index 0000000..b0381aa
--- /dev/null
+++ b/posix_api/psx_sched_report/psx_sched_report.c
@@ -0,0 +1,55 @@
+/*
+ *  Program to print POSIX Scheduler Characteristics
+ */
+
+/*
+ * Copyright 2018 Joel Sherrill (joel@rtems.org)
+ *
+ * This file's license is 2-clause BSD as in this distribution's LICENSE.2 file.
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <sched.h>
+/* FreeBSD 10 needs this for struct timespec which seems wrong */
+#include <time.h>
+
+void print_sched_info(
+  char *s,
+  int policy
+)
+{
+  int min, max, levels;
+  struct timespec t;
+
+  printf( "Information on %s\n", s );
+  min = sched_get_priority_min( policy );
+  max = sched_get_priority_max( policy );
+  (void) sched_rr_get_interval( 1, &t );
+  levels = abs(max - min + 1);
+  printf( "\tSupports %d priority levels (%d - %d)\n", levels, min, max  );
+  if ( levels >= 32 )
+    printf( "\tImplementation is compliant on priority levels\n");
+  else
+    printf( "\tImplementation is NOT compliant on priority levels\n" );
+
+  printf( "\tScheduling quantum is %ld seconds and %ld nanoseconds\n",
+              (long)t.tv_sec, (long)t.tv_nsec );
+  puts( "" );
+}
+
+int main()
+{
+  puts( "*** POSIX Scheduler Characteristics Report ***" );
+  print_sched_info( "SCHED_OTHER", SCHED_OTHER );
+  print_sched_info( "SCHED_FIFO", SCHED_FIFO );
+  print_sched_info( "SCHED_RR", SCHED_RR );
+#if defined(SCHED_SPORADIC)
+  print_sched_info( "SCHED_SPORADIC", SCHED_SPORADIC );
+#else
+  printf( "SCHED_SPORADIC is not supported\n" );
+#endif
+  puts( "*** END OF POSIX Scheduler Characteristics Report ***" );
+
+  exit( 0 );
+}