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Message-Id: <1fe28ea2525f112264a1a819d8ce50a97504ab8b.1684932892.git.Jens.Gustedt@inria.fr>
Date: Wed, 24 May 2023 21:38:52 +0200
From: Jens Gustedt <Jens.Gustedt@...ia.fr>
To: musl@...ts.openwall.com
Subject: [C23 new stdlib 2/4] C23: add the memalignment function
The name is reserved, so we don't need to protect it via a feature
macro or a weak symbol.
---
include/stdlib.h | 3 +++
src/stdlib/memalignment.c | 6 ++++++
2 files changed, 9 insertions(+)
create mode 100644 src/stdlib/memalignment.c
diff --git a/include/stdlib.h b/include/stdlib.h
index 7800074d..68993c04 100644
--- a/include/stdlib.h
+++ b/include/stdlib.h
@@ -178,6 +178,9 @@ long double strtold_l(const char *__restrict, char **__restrict, struct __locale
typedef int once_flag;
void call_once(once_flag *, void (*)(void));
+size_t (memalignment)(const void *);
+#define memalignment(P) (((size_t)1)<<__builtin_ctzll((unsigned long long)P))
+
#ifdef __cplusplus
}
#endif
diff --git a/src/stdlib/memalignment.c b/src/stdlib/memalignment.c
new file mode 100644
index 00000000..58b68954
--- /dev/null
+++ b/src/stdlib/memalignment.c
@@ -0,0 +1,6 @@
+#include <stdlib.h>
+
+size_t (memalignment)(const void *p)
+{
+ return memalignment(p);
+}
--
2.34.1
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