[v3,11/17] lib min_heap: Update min_heap_push() and min_heap_pop() to return bool values

Commit Message

Kuan-Wei Chiu April 6, 2024, 4:47 p.m. UTC

Modify the min_heap_push() and min_heap_pop() to return a boolean
value. They now return false when the operation fails and true when it
succeeds.

Signed-off-by: Kuan-Wei Chiu <[e-mail]>
Reviewed-by: Ian Rogers <[e-mail]>
---
 include/linux/min_heap.h | 12 ++++++++----
 1 file changed, 8 insertions(+), 4 deletions(-)

Patch

diff --git a/include/linux/min_heap.h b/include/linux/min_heap.h
index 2aee024ca883..889d410862c7 100644
--- a/include/linux/min_heap.h
+++ b/include/linux/min_heap.h
@@ -147,18 +147,20 @@  void __min_heapify_all(min_heap_char *heap, size_t elem_size,
 
 /* Remove minimum element from the heap, O(log2(nr)). */
 static __always_inline
-void __min_heap_pop(min_heap_char *heap, size_t elem_size,
+bool __min_heap_pop(min_heap_char *heap, size_t elem_size,
 		const struct min_heap_callbacks *func, void *args)
 {
 	void *data = heap->data;
 
 	if (WARN_ONCE(heap->nr <= 0, "Popping an empty heap"))
-		return;
+		return false;
 
 	/* Place last element at the root (position 0) and then sift down. */
 	heap->nr--;
 	memcpy(data, data + (heap->nr * elem_size), elem_size);
 	__min_heapify(heap, 0, elem_size, func, args);
+
+	return true;
 }
 
 #define min_heap_pop(_heap, _func, _args)	\
@@ -184,7 +186,7 @@  void __min_heap_pop_push(min_heap_char *heap,
 
 /* Push an element on to the heap, O(log2(nr)). */
 static __always_inline
-void __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
+bool __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
 		const struct min_heap_callbacks *func, void *args)
 {
 	void *data = heap->data;
@@ -192,7 +194,7 @@  void __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
 	int pos;
 
 	if (WARN_ONCE(heap->nr >= heap->size, "Pushing on a full heap"))
-		return;
+		return false;
 
 	/* Place at the end of data. */
 	pos = heap->nr;
@@ -207,6 +209,8 @@  void __min_heap_push(min_heap_char *heap, const void *element, size_t elem_size,
 			break;
 		func->swp(parent, child, args);
 	}
+
+	return true;
 }
 
 #define min_heap_push(_heap, _element, _func, _args)	\