alloc: New header for memory allocation utilities

1 files changed, 24 insertions, 0 deletions

diff --git a/tests/alloc.c b/tests/alloc.c
new file mode 100644
index 0000000..91b1b43
--- /dev/null
+++ b/tests/alloc.c
@@ -0,0 +1,24 @@
+// Copyright © Tavian Barnes <tavianator@tavianator.com>
+// SPDX-License-Identifier: 0BSD
+
+#include "../src/alloc.h"
+#include "../src/diag.h"
+#include <stdlib.h>
+
+int main(void) {
+	// Check sizeof_flex()
+	struct flexible {
+		alignas(64) int foo;
+		int bar[];
+	};
+	bfs_verify(sizeof_flex(struct flexible, bar, 0) >= sizeof(struct flexible));
+	bfs_verify(sizeof_flex(struct flexible, bar, 16) % alignof(struct flexible) == 0);
+	bfs_verify(sizeof_flex(struct flexible, bar, SIZE_MAX / sizeof(int) + 1)
+	           == align_floor(alignof(struct flexible), SIZE_MAX));
+
+	// Corner case: sizeof(type) > align_ceil(alignof(type), offsetof(type, member))
+	// Doesn't happen in typical ABIs
+	bfs_verify(flex_size(8, 16, 4, 4, 1) == 16);
+
+	return EXIT_SUCCESS;
+}