[PATCH 3/4] score: Add resource node to thread control block
Sebastian Huber
sebastian.huber at embedded-brains.de
Wed May 28 14:29:27 UTC 2014
---
cpukit/score/include/rtems/score/thread.h | 8 ++++++++
cpukit/score/include/rtems/score/threadimpl.h | 10 ++++++++++
cpukit/score/src/threadinitialize.c | 2 ++
3 files changed, 20 insertions(+), 0 deletions(-)
diff --git a/cpukit/score/include/rtems/score/thread.h b/cpukit/score/include/rtems/score/thread.h
index 10c7ddc..6ae684b 100644
--- a/cpukit/score/include/rtems/score/thread.h
+++ b/cpukit/score/include/rtems/score/thread.h
@@ -28,6 +28,7 @@
#include <rtems/score/object.h>
#include <rtems/score/percpu.h>
#include <rtems/score/priority.h>
+#include <rtems/score/resource.h>
#include <rtems/score/stack.h>
#include <rtems/score/states.h>
#include <rtems/score/threadq.h>
@@ -488,6 +489,13 @@ struct Thread_Control_struct {
*/
Chain_Control lock_mutex;
#endif
+#if defined(RTEMS_SMP)
+ /**
+ * @brief Resource node to build a dependency tree in case this thread owns
+ * resources or depends on a resource.
+ */
+ Resource_Node Resource_node;
+#endif
/*================= end of common block =================*/
#if defined(RTEMS_MULTIPROCESSING)
/** This field is true if the thread is offered globally */
diff --git a/cpukit/score/include/rtems/score/threadimpl.h b/cpukit/score/include/rtems/score/threadimpl.h
index 1f63d06..39c40df 100644
--- a/cpukit/score/include/rtems/score/threadimpl.h
+++ b/cpukit/score/include/rtems/score/threadimpl.h
@@ -26,6 +26,7 @@
#include <rtems/score/interr.h>
#include <rtems/score/isr.h>
#include <rtems/score/objectimpl.h>
+#include <rtems/score/resourceimpl.h>
#include <rtems/score/statesimpl.h>
#include <rtems/score/sysstate.h>
#include <rtems/score/todimpl.h>
@@ -791,6 +792,10 @@ RTEMS_INLINE_ROUTINE bool _Thread_Is_life_changing(
* Resources are accounted with the Thread_Control::resource_count resource
* counter. This counter is used by semaphore objects for example.
*
+ * In addition to the resource counter there is a resource dependency tree
+ * available on SMP configurations. In case this tree is non-empty, then the
+ * thread owns resources.
+ *
* @param[in] the_thread The thread.
*/
RTEMS_INLINE_ROUTINE bool _Thread_Owns_resources(
@@ -799,6 +804,11 @@ RTEMS_INLINE_ROUTINE bool _Thread_Owns_resources(
{
bool owns_resources = the_thread->resource_count != 0;
+#if defined(RTEMS_SMP)
+ owns_resources = owns_resources
+ || _Resource_Node_owns_resources( &the_thread->Resource_node );
+#endif
+
return owns_resources;
}
diff --git a/cpukit/score/src/threadinitialize.c b/cpukit/score/src/threadinitialize.c
index b65628d..9c65d73 100644
--- a/cpukit/score/src/threadinitialize.c
+++ b/cpukit/score/src/threadinitialize.c
@@ -19,6 +19,7 @@
#endif
#include <rtems/score/threadimpl.h>
+#include <rtems/score/resourceimpl.h>
#include <rtems/score/schedulerimpl.h>
#include <rtems/score/stackimpl.h>
#include <rtems/score/tls.h>
@@ -182,6 +183,7 @@ bool _Thread_Initialize(
#if defined(RTEMS_SMP)
the_thread->scheduler = scheduler;
+ _Resource_Node_initialize( &the_thread->Resource_node );
_CPU_Context_Set_is_executing( &the_thread->Registers, false );
#endif
--
1.7.7
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