unsafe_shared_memory_region.h | Explore in Territory

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef BASE_MEMORY_UNSAFE_SHARED_MEMORY_REGION_H_
#define BASE_MEMORY_UNSAFE_SHARED_MEMORY_REGION_H_

#include "base/base_export.h"
#include "base/check.h"
#include "base/memory/platform_shared_memory_region.h"
#include "base/memory/shared_memory_mapping.h"

#include <stdint.h>

namespace base {

// Scoped move-only handle to a region of platform shared memory. The instance
// owns the platform handle it wraps. Mappings created by this region are
// writable. These mappings remain valid even after the region handle is moved
// or destroyed.
//
// NOTE: UnsafeSharedMemoryRegion cannot be converted to a read-only region. Use
// with caution as the region will be writable to any process with a handle to
// the region.
//
// Use this if and only if the following is true:
// - You do not need to share the region as read-only, and,
// - You need to have several instances of the region simultaneously, possibly
//   in different processes, that can produce writable mappings.

class BASE_EXPORT UnsafeSharedMemoryRegion { … };

}  // namespace base

#endif  // BASE_MEMORY_UNSAFE_SHARED_MEMORY_REGION_H_
chromium/base/memory/unsafe_shared_memory_region.h
