chromium/base/allocator/partition_allocator/src/partition_alloc/thread_isolation/alignment.h

// Copyright 2023 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef PARTITION_ALLOC_THREAD_ISOLATION_ALIGNMENT_H_
#define PARTITION_ALLOC_THREAD_ISOLATION_ALIGNMENT_H_

#include "partition_alloc/buildflags.h"

#if PA_BUILDFLAG(ENABLE_THREAD_ISOLATION)

#include "partition_alloc/page_allocator_constants.h"

#define PA_THREAD_ISOLATED_ALIGN_SZ …
#define PA_THREAD_ISOLATED_ALIGN_OFFSET_MASK …
#define PA_THREAD_ISOLATED_ALIGN_BASE_MASK …
#define PA_THREAD_ISOLATED_ALIGN …

#define PA_THREAD_ISOLATED_FILL_PAGE_SZ(size) …
// Calculate the required padding so that the last element of a page-aligned
// array lands on a page boundary. In other words, calculate that padding so
// that (count-1) elements are a multiple of page size.
// The offset parameter additionally skips bytes in the object, e.g.
// object+offset will be page aligned.
#define PA_THREAD_ISOLATED_ARRAY_PAD_SZ_WITH_OFFSET(Type, count, offset) …

#define PA_THREAD_ISOLATED_ARRAY_PAD_SZ(Type, count) …

#else  // PA_BUILDFLAG(ENABLE_THREAD_ISOLATION)

#define PA_THREAD_ISOLATED_ALIGN
#define PA_THREAD_ISOLATED_FILL_PAGE_SZ …
#define PA_THREAD_ISOLATED_ARRAY_PAD_SZ …
#define PA_THREAD_ISOLATED_ARRAY_PAD_SZ_WITH_OFFSET …

#endif  // PA_BUILDFLAG(ENABLE_THREAD_ISOLATION)

#endif  // PARTITION_ALLOC_THREAD_ISOLATION_ALIGNMENT_H_