[libc-commits] [libc] [libc][c23] add memset_explicit (PR #83577)

[Nick Desaulniers via libc-commits]

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@@ -0,0 +1,27 @@
+//===-- Flush Cacheline for x86_64 ------------------------------*- C++ -*-===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+#ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_X86_64_FLUSH_CACHELINE_H
+#define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_X86_64_FLUSH_CACHELINE_H
+
+#include "src/__support/common.h"
+#include <stddef.h> // size_t
+namespace LIBC_NAMESPACE {
+
+LIBC_INLINE constexpr size_t cacheline_size() { return 64; }
+
+LIBC_INLINE void flush_cacheline_async(volatile char *addr) {
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nickdesaulniers wrote:

why `volatile`?

https://github.com/llvm/llvm-project/pull/83577