From: Kuan-Wei Chiu <visitorckw@gmail.com>
To: colyli@suse.de, kent.overstreet@linux.dev, msakai@redhat.com,
peterz@infradead.org, mingo@redhat.com, acme@kernel.org,
namhyung@kernel.org, akpm@linux-foundation.org
Cc: bfoster@redhat.com, mark.rutland@arm.com,
alexander.shishkin@linux.intel.com, jolsa@kernel.org,
irogers@google.com, adrian.hunter@intel.com,
jserv@ccns.ncku.edu.tw, dm-devel@lists.linux.dev,
linux-bcache@vger.kernel.org, linux-kernel@vger.kernel.org,
linux-bcachefs@vger.kernel.org, linux-perf-users@vger.kernel.org,
Kuan-Wei Chiu <visitorckw@gmail.com>
Subject: [PATCH v2 09/15] lib min_heap: Add min_heap_sift_up()
Date: Wed, 20 Mar 2024 22:54:11 +0800 [thread overview]
Message-ID: <20240320145417.336208-10-visitorckw@gmail.com> (raw)
In-Reply-To: <20240320145417.336208-1-visitorckw@gmail.com>
Add min_heap_sift_up() to sift up the element at index 'idx' in the
heap.
Signed-off-by: Kuan-Wei Chiu <visitorckw@gmail.com>
---
include/linux/min_heap.h | 20 ++++++++++++++++++++
1 file changed, 20 insertions(+)
diff --git a/include/linux/min_heap.h b/include/linux/min_heap.h
index 36023e0be232..af12531474a4 100644
--- a/include/linux/min_heap.h
+++ b/include/linux/min_heap.h
@@ -194,6 +194,26 @@ void __min_heap_push(struct __min_heap *heap, const void *element, size_t elem_s
#define min_heap_push(_heap, _element, _func) \
__min_heap_push(&(_heap)->heap, _element, __minheap_obj_size(_heap), _func)
+/* Sift up ith element from the heap, O(log2(nr)). */
+static __always_inline
+void __min_heap_sift_up(struct __min_heap *heap, size_t elem_size, size_t idx,
+ const struct min_heap_callbacks *func, void *args)
+{
+ void *data = heap->data;
+ size_t parent;
+
+ while (idx) {
+ parent = (idx - 1) / 2;
+ if (func->less(data + parent * elem_size, data + idx * elem_size, args))
+ break;
+ func->swp(data + parent * elem_size, data + idx * elem_size, args);
+ idx = parent;
+ }
+}
+
+#define min_heap_sift_up(_heap, _idx, _func, _args) \
+ __min_heap_sift_up(&(_heap)->heap, __minheap_obj_size(_heap), _idx, _func, _args)
+
/* Remove ith element from the heap, O(log2(nr)). */
static __always_inline
bool __min_heap_del(struct __min_heap *heap, size_t elem_size, size_t idx,
--
2.34.1
next prev parent reply other threads:[~2024-03-20 14:55 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2024-03-20 14:54 [PATCH v2 00/15] treewide: Refactor heap related implementation Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 01/15] perf/core: Fix several typos Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 02/15] bcache: Fix typo Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 03/15] bcachefs: " Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 04/15] lib min_heap: Add type safe interface Kuan-Wei Chiu
2024-03-20 20:56 ` Kent Overstreet
2024-03-21 11:57 ` Kuan-Wei Chiu
2024-03-21 21:22 ` Kent Overstreet
2024-03-22 17:02 ` Kuan-Wei Chiu
2024-03-22 18:23 ` Kent Overstreet
2024-03-23 1:53 ` Kuan-Wei Chiu
2024-03-23 2:08 ` Kent Overstreet
2024-03-23 2:19 ` Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 05/15] lib min_heap: Add min_heap_init() Kuan-Wei Chiu
2024-03-20 17:13 ` Ian Rogers
2024-03-20 17:17 ` Ian Rogers
2024-03-20 14:54 ` [PATCH v2 06/15] lib min_heap: Add min_heap_peek() Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 07/15] lib min_heap: Add min_heap_full() Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 08/15] lib min_heap: Add min_heap_del() Kuan-Wei Chiu
2024-03-20 14:54 ` Kuan-Wei Chiu [this message]
2024-03-20 17:15 ` [PATCH v2 09/15] lib min_heap: Add min_heap_sift_up() Ian Rogers
2024-03-21 7:00 ` Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 10/15] lib min_heap: Add args for min_heap_callbacks Kuan-Wei Chiu
2024-03-20 17:15 ` Ian Rogers
2024-03-20 14:54 ` [PATCH v2 11/15] lib min_heap: Update min_heap_push() and min_heap_pop() to return bool values Kuan-Wei Chiu
2024-03-20 14:54 ` [PATCH v2 12/15] lib min_heap: Rename min_heapify() to min_heap_sift_down() Kuan-Wei Chiu
2024-03-20 17:17 ` Ian Rogers
2024-03-20 14:54 ` [PATCH v2 13/15] lib/test_min_heap: Use min_heap_init() for initializing Kuan-Wei Chiu
2024-03-20 17:16 ` Ian Rogers
2024-03-20 14:54 ` [PATCH v2 14/15] bcache: Remove heap-related macros and switch to generic min_heap Kuan-Wei Chiu
2024-03-20 17:19 ` Ian Rogers
2024-03-20 14:54 ` [PATCH v2 15/15] bcachefs: " Kuan-Wei Chiu
2024-03-20 17:20 ` Ian Rogers
2024-03-20 19:57 ` [PATCH v2 00/15] treewide: Refactor heap related implementation Kent Overstreet
2024-03-21 7:08 ` Kuan-Wei Chiu
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