sptests/spsem04: test prio stepdown on sem release

Closes #3263.

testsuites/sptests/Makefile.am

@@ -24,7 +24,7 @@ _SUBDIRS = \
     spintrcritical13 spintrcritical14 spintrcritical15 spintrcritical16 \
     spintrcritical17
 
-_SUBDIRS += spsem01 spsem02 spsem03
+_SUBDIRS += spsem01 spsem02 spsem03 spsem04
  
 DIST_SUBDIRS = $(_SUBDIRS) spfatal_support spintrcritical_support
 EXTRA_DIST = spfatal_support/init.c spfatal_support/system.h

testsuites/sptests/configure.ac

@@ -134,6 +134,7 @@ spprintk/Makefile
 spsem01/Makefile
 spsem02/Makefile
 spsem03/Makefile
+spsem04/Makefile
 spsize/Makefile
 spstkalloc/Makefile
 spthreadq01/Makefile

testsuites/sptests/spsem04/Makefile.am

@@ -0,0 +1,19 @@
+rtems_tests_PROGRAMS = spsem04
+spsem04_SOURCES = init.c
+
+dist_rtems_tests_DATA = spsem04.scn spsem04.doc
+
+include $(RTEMS_ROOT)/make/custom/@RTEMS_BSP@.cfg
+include $(top_srcdir)/../automake/compile.am
+include $(top_srcdir)/../automake/leaf.am
+
+AM_CPPFLAGS += -I$(top_srcdir)/../support/include
+
+LINK_OBJS = $(spsem04_OBJECTS)
+LINK_LIBS = $(spsem04_LDLIBS)
+
+spsem04$(EXEEXT): $(spsem04_OBJECTS) $(spsem04_DEPENDENCIES)
+	@rm -f spsem04$(EXEEXT)
+	$(make-exe)
+
+include $(top_srcdir)/../automake/local.am

testsuites/sptests/spsem04/init.c

@@ -0,0 +1,149 @@
+/*
+ * Copyright (c) 2017 Gedare Bloom.
+ * Copyright (c) 2014, 2016 embedded brains GmbH.  All rights reserved.
+ *
+ *  embedded brains GmbH
+ *  Dornierstr. 4
+ *  82178 Puchheim
+ *  Germany
+ *  <rtems@embedded-brains.de>
+ *
+ * The license and distribution terms for this file may be
+ * found in the file LICENSE in this distribution or at
+ * http://www.rtems.org/license/LICENSE.
+ */
+
+#ifdef HAVE_CONFIG_H
+  #include "config.h"
+#endif
+
+#include "tmacros.h"
+
+const char rtems_test_name[] = "SPSEM 4";
+
+typedef struct {
+  rtems_id low;
+  rtems_id mid;
+  rtems_id high;
+  rtems_id sem_a;
+  rtems_id sem_b;
+} test_context;
+
+static test_context test_instance;
+
+static void assert_prio(rtems_id task_id, rtems_task_priority expected_prio)
+{
+  rtems_status_code sc;
+  rtems_task_priority prio;
+
+  sc = rtems_task_set_priority(task_id, RTEMS_CURRENT_PRIORITY, &prio);
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+  rtems_test_assert(prio == expected_prio);
+}
+
+static void create_task(rtems_id *id, rtems_task_priority prio)
+{
+  rtems_status_code sc;
+
+  sc = rtems_task_create(
+    rtems_build_name('T', 'A', 'S', 'K'),
+    prio,
+    RTEMS_MINIMUM_STACK_SIZE,
+    RTEMS_DEFAULT_MODES,
+    RTEMS_DEFAULT_ATTRIBUTES,
+    id
+  );
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void start_task(rtems_id id, rtems_task_entry entry)
+{
+  rtems_status_code sc;
+
+  sc = rtems_task_start(id, entry, 0);
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void create_sema(rtems_id *id)
+{
+  rtems_status_code sc;
+
+  sc = rtems_semaphore_create(
+    rtems_build_name('S', 'E', 'M', 'A'),
+    1,
+    RTEMS_BINARY_SEMAPHORE | RTEMS_INHERIT_PRIORITY | RTEMS_PRIORITY,
+    0,
+    id
+  );
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void obtain_sema(rtems_id id)
+{
+  rtems_status_code sc;
+
+  sc = rtems_semaphore_obtain(id, RTEMS_WAIT, RTEMS_NO_TIMEOUT);
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void release_sema(rtems_id id)
+{
+  rtems_status_code sc;
+
+  sc = rtems_semaphore_release(id);
+  rtems_test_assert(sc == RTEMS_SUCCESSFUL);
+}
+
+static void mid_task(rtems_task_argument arg)
+{
+  test_context *ctx = &test_instance;
+
+  rtems_test_assert(0);
+}
+
+static void high_task(rtems_task_argument arg)
+{
+  test_context *ctx = &test_instance;
+
+  start_task(ctx->mid, mid_task);
+  obtain_sema(ctx->sem_b);
+  
+  printf("*** END OF TEST SPSEM 4 ***\n");
+  rtems_test_exit(0);
+}
+
+static void Init(rtems_task_argument arg)
+{
+  test_context *ctx = &test_instance;
+
+  printf("*** BEGIN OF TEST SPSEM 4 ***\n");
+
+  ctx->low = rtems_task_self();
+  create_task(&ctx->mid, 3);
+  create_task(&ctx->high, 1);
+  create_sema(&ctx->sem_a);
+  create_sema(&ctx->sem_b);
+
+  obtain_sema(ctx->sem_a);
+  obtain_sema(ctx->sem_b);
+  start_task(ctx->high, high_task);
+
+  release_sema(ctx->sem_b);
+
+  rtems_test_assert(0);
+}
+
+#define CONFIGURE_APPLICATION_NEEDS_CLOCK_DRIVER
+#define CONFIGURE_APPLICATION_NEEDS_CONSOLE_DRIVER
+
+#define CONFIGURE_MAXIMUM_TASKS 4
+#define CONFIGURE_MAXIMUM_SEMAPHORES 2
+
+#define CONFIGURE_INIT_TASK_PRIORITY 4
+#define CONFIGURE_INIT_TASK_INITIAL_MODES RTEMS_DEFAULT_MODES
+
+#define CONFIGURE_RTEMS_INIT_TASKS_TABLE
+
+#define CONFIGURE_INIT
+
+#include <rtems/confdefs.h>

testsuites/sptests/spsem04/spsem04.doc

@@ -0,0 +1,13 @@
+This file describes the directives and concepts tested by this test set.
+
+test set name: spsem04
+
+directives:
+
+  - rtems_semaphore_obtain()
+  - rtems_semaphore_release()
+
+concepts:
+
+  - Demonstrate that the priority inheritance protocol works with stepping
+    down of priority on semaphore release.

testsuites/sptests/spsem04/spsem04.scn

@@ -0,0 +1,2 @@
+*** BEGIN OF TEST SPSEM 4 ***
+*** END OF TEST SPSEM 4 ***