[rtems commit] score: Add _Freechain_Is_empty()

[Sebastian Huber]

Module:    rtems
Branch:    master
Commit:    8ff1af16551eedd7e98af6c65a91bb62b9403991
Changeset: http://git.rtems.org/rtems/commit/?id=8ff1af16551eedd7e98af6c65a91bb62b9403991

Author:    Sebastian Huber <sebastian.huber at embedded-brains.de>
Date:      Tue Dec 10 10:58:42 2019 +0100

score: Add _Freechain_Is_empty()

Update #3835.

---

 cpukit/include/rtems/score/freechain.h  | 12 ++++++++++++
 testsuites/sptests/spfreechain01/init.c |  3 ++-
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/cpukit/include/rtems/score/freechain.h b/cpukit/include/rtems/score/freechain.h
index e65eba1..bbae0b6 100644
--- a/cpukit/include/rtems/score/freechain.h
+++ b/cpukit/include/rtems/score/freechain.h
@@ -80,6 +80,18 @@ RTEMS_INLINE_ROUTINE void _Freechain_Initialize(
 }
 
 /**
+ * @brief Return true if the freechain is empty, otherwise false
+ *
+ * @param freechain The freechain control.
+ */
+RTEMS_INLINE_ROUTINE bool _Freechain_Is_empty(
+  const Freechain_Control *freechain
+)
+{
+  return _Chain_Is_empty( &freechain->Free );
+}
+
+/**
  * @brief Gets a node from the freechain.
  *
  * @param[in, out] freechain The freechain control.
diff --git a/testsuites/sptests/spfreechain01/init.c b/testsuites/sptests/spfreechain01/init.c
index 2273079..370bfb4 100644
--- a/testsuites/sptests/spfreechain01/init.c
+++ b/testsuites/sptests/spfreechain01/init.c
@@ -30,12 +30,13 @@ static rtems_task Init(rtems_task_argument ignored)
     TEST_BEGIN();
 
     _Freechain_Initialize(&fc, &node2, 1, sizeof(node2));
+    rtems_test_assert(!_Freechain_Is_empty(&fc));
     rtems_test_assert(_Chain_Node_count_unprotected(&fc.Free) == 1);
     rtems_test_assert(_Chain_First(&fc.Free) == &node2.Node);
     rtems_test_assert(_Chain_Last(&fc.Free) == &node2.Node);
 
     _Freechain_Initialize(&fc, NULL, 0, sizeof(test_node));
-    rtems_test_assert(_Chain_Is_empty(&fc.Free));
+    rtems_test_assert(_Freechain_Is_empty(&fc));
 
     rtems_test_assert(_Freechain_Get(&fc, NULL, 0, sizeof(test_node)) == NULL);