kernel: Propagate z_handle_obj_poll_events() return

Propagates the return value from z_handle_obj_poll_events()
within the message queue, pipes, queue and semaphore objects.
This allows the kernel object code to determine whether it
needs to perform a full reschedule, or if it can perform a
more optimized exit strategy.

Signed-off-by: Peter Mitsis <peter.mitsis@intel.com>

kernel/msg_q.c

@@ -29,12 +29,16 @@
 static struct k_obj_type obj_type_msgq;
 #endif /* CONFIG_OBJ_CORE_MSGQ */
 
-#ifdef CONFIG_POLL
-static inline void handle_poll_events(struct k_msgq *msgq, uint32_t state)
+static inline bool handle_poll_events(struct k_msgq *msgq)
 {
-	z_handle_obj_poll_events(&msgq->poll_events, state);
-}
+#ifdef CONFIG_POLL
+	return z_handle_obj_poll_events(&msgq->poll_events,
+					K_POLL_STATE_MSGQ_DATA_AVAILABLE);
+#else
+	ARG_UNUSED(msgq);
+	return false;
 #endif /* CONFIG_POLL */
+}
 
 void k_msgq_init(struct k_msgq *msgq, char *buffer, size_t msg_size,
 		 uint32_t max_msgs)
@@ -157,9 +161,7 @@ int z_impl_k_msgq_put(struct k_msgq *msgq, const void *data, k_timeout_t timeout
 				msgq->write_ptr = msgq->buffer_start;
 			}
 			msgq->used_msgs++;
-#ifdef CONFIG_POLL
-			handle_poll_events(msgq, K_POLL_STATE_MSGQ_DATA_AVAILABLE);
-#endif /* CONFIG_POLL */
+			(void)handle_poll_events(msgq);
 		}
 		result = 0;
 	} else if (K_TIMEOUT_EQ(timeout, K_NO_WAIT)) {

kernel/pipes.c

@@ -105,12 +105,13 @@ static inline int z_vrfy_k_pipe_alloc_init(struct k_pipe *pipe, size_t size)
 #include <zephyr/syscalls/k_pipe_alloc_init_mrsh.c>
 #endif /* CONFIG_USERSPACE */
 
-static inline void handle_poll_events(struct k_pipe *pipe)
+static inline bool handle_poll_events(struct k_pipe *pipe)
 {
 #ifdef CONFIG_POLL
-	z_handle_obj_poll_events(&pipe->poll_events, K_POLL_STATE_PIPE_DATA_AVAILABLE);
+	return z_handle_obj_poll_events(&pipe->poll_events, K_POLL_STATE_PIPE_DATA_AVAILABLE);
 #else
 	ARG_UNUSED(pipe);
+	return false;
 #endif /* CONFIG_POLL */
 }
 
@@ -468,7 +469,7 @@ int z_impl_k_pipe_put(struct k_pipe *pipe, const void *data,
 	 */
 
 	if ((pipe->bytes_used != 0U) && (*bytes_written != 0U)) {
-		handle_poll_events(pipe);
+		reschedule_needed = handle_poll_events(pipe) || reschedule_needed;
 	}
 
 	/*

kernel/queue.c

@@ -84,13 +84,15 @@ static void prepare_thread_to_run(struct k_thread *thread, void *data)
 	z_ready_thread(thread);
 }
 
-static inline void handle_poll_events(struct k_queue *queue, uint32_t state)
+static inline bool handle_poll_events(struct k_queue *queue, uint32_t state)
 {
 #ifdef CONFIG_POLL
-	z_handle_obj_poll_events(&queue->poll_events, state);
+	return z_handle_obj_poll_events(&queue->poll_events, state);
 #else
 	ARG_UNUSED(queue);
 	ARG_UNUSED(state);
+
+	return false;
 #endif /* CONFIG_POLL */
 }
 
@@ -107,7 +109,7 @@ void z_impl_k_queue_cancel_wait(struct k_queue *queue)
 		prepare_thread_to_run(first_pending_thread, NULL);
 	}
 
-	handle_poll_events(queue, K_POLL_STATE_CANCELLED);
+	(void)handle_poll_events(queue, K_POLL_STATE_CANCELLED);
 	z_reschedule(&queue->lock, key);
 }
 
@@ -167,7 +169,7 @@ static int32_t queue_insert(struct k_queue *queue, void *prev, void *data,
 	SYS_PORT_TRACING_OBJ_FUNC_BLOCKING(k_queue, queue_insert, queue, alloc, K_FOREVER);
 
 	sys_sflist_insert(&queue->data_q, prev, data);
-	handle_poll_events(queue, K_POLL_STATE_DATA_AVAILABLE);
+	(void)handle_poll_events(queue, K_POLL_STATE_DATA_AVAILABLE);
 	z_reschedule(&queue->lock, key);
 
 	SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_queue, queue_insert, queue, alloc, 0);
@@ -274,7 +276,7 @@ int k_queue_append_list(struct k_queue *queue, void *head, void *tail)
 
 	SYS_PORT_TRACING_OBJ_FUNC_EXIT(k_queue, append_list, queue, 0);
 
-	handle_poll_events(queue, K_POLL_STATE_DATA_AVAILABLE);
+	(void)handle_poll_events(queue, K_POLL_STATE_DATA_AVAILABLE);
 	z_reschedule(&queue->lock, key);
 	return 0;
 }

kernel/sem.c

@@ -85,8 +85,7 @@ int z_vrfy_k_sem_init(struct k_sem *sem, unsigned int initial_count,
 static inline bool handle_poll_events(struct k_sem *sem)
 {
 #ifdef CONFIG_POLL
-	z_handle_obj_poll_events(&sem->poll_events, K_POLL_STATE_SEM_AVAILABLE);
-	return true;
+	return z_handle_obj_poll_events(&sem->poll_events, K_POLL_STATE_SEM_AVAILABLE);
 #else
 	ARG_UNUSED(sem);
 	return false;
@@ -180,7 +179,7 @@ void z_impl_k_sem_reset(struct k_sem *sem)
 
 	SYS_PORT_TRACING_OBJ_FUNC(k_sem, reset, sem);
 
-	handle_poll_events(sem);
+	(void)handle_poll_events(sem);
 
 	z_reschedule(&lock, key);
 }