From bed9b9171cad11e3a8dd0dea90856779a683a9a5 Mon Sep 17 00:00:00 2001
From: Tavian Barnes <tavianator@tavianator.com>
Date: Wed, 30 Oct 2024 13:36:49 -0400
Subject: alloc: Add macro versions of alignment utils
---
src/alloc.h | 15 ++++++++++++---
1 file changed, 12 insertions(+), 3 deletions(-)
diff --git a/src/alloc.h b/src/alloc.h
index 7865d5d..34d9273 100644
--- a/src/alloc.h
+++ b/src/alloc.h
@@ -14,19 +14,28 @@
#include <stddef.h>
#include <stdlib.h>
+#define IS_ALIGNED(align, size) \
+ (((size) & ((align) - 1)) == 0)
+
/** Check if a size is properly aligned. */
static inline bool is_aligned(size_t align, size_t size) {
- return (size & (align - 1)) == 0;
+ return IS_ALIGNED(align, size);
}
+#define ALIGN_FLOOR(align, size) \
+ ((size) & ~((align) - 1))
+
/** Round down to a multiple of an alignment. */
static inline size_t align_floor(size_t align, size_t size) {
- return size & ~(align - 1);
+ return ALIGN_FLOOR(align, size);
}
+#define ALIGN_CEIL(align, size) \
+ ((((size) - 1) | ((align) - 1)) + 1)
+
/** Round up to a multiple of an alignment. */
static inline size_t align_ceil(size_t align, size_t size) {
- return align_floor(align, size + align - 1);
+ return ALIGN_CEIL(align, size);
}
/**
--
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