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-rw-r--r--cpukit/score/include/rtems/score/threadqimpl.h13
1 files changed, 12 insertions, 1 deletions
diff --git a/cpukit/score/include/rtems/score/threadqimpl.h b/cpukit/score/include/rtems/score/threadqimpl.h
index e1060e4e82..cf3aeed053 100644
--- a/cpukit/score/include/rtems/score/threadqimpl.h
+++ b/cpukit/score/include/rtems/score/threadqimpl.h
@@ -214,8 +214,16 @@ RTEMS_INLINE_ROUTINE void _Thread_queue_Enqueue(
* @param[in] queue The actual thread queue.
* @param[in] operations The thread queue operations.
* @param[in] the_thread The thread to extract.
+ *
+ * @return Returns the unblock indicator for _Thread_queue_Unblock_critical().
+ * True indicates, that this thread must be unblocked by the scheduler later in
+ * _Thread_queue_Unblock_critical(), and false otherwise. In case false is
+ * returned, then the thread queue enqueue procedure was interrupted. Thus it
+ * will unblock itself and the thread wait information is no longer accessible,
+ * since this thread may already block on another resource in an SMP
+ * configuration.
*/
-void _Thread_queue_Extract_locked(
+bool _Thread_queue_Extract_locked(
Thread_queue_Queue *queue,
const Thread_queue_Operations *operations,
Thread_Control *the_thread
@@ -229,11 +237,14 @@ void _Thread_queue_Extract_locked(
* thread queue lock is released and an unblock is necessary. Thread
* dispatching is enabled once the sequence to unblock the thread is complete.
*
+ * @param[in] unblock The unblock indicator returned by
+ * _Thread_queue_Extract_locked().
* @param[in] queue The actual thread queue.
* @param[in] the_thread The thread to extract.
* @param[in] lock_context The lock context of the lock acquire.
*/
void _Thread_queue_Unblock_critical(
+ bool unblock,
Thread_queue_Queue *queue,
Thread_Control *the_thread,
ISR_lock_Context *lock_context