chromium/third_party/blink/renderer/platform/disk_data_allocator.h

// Copyright 2020 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_ALLOCATOR_H_
#define THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_ALLOCATOR_H_

#include <map>
#include <memory>

#include "base/dcheck_is_on.h"
#include "base/files/file.h"
#include "base/gtest_prod_util.h"
#include "base/synchronization/lock.h"
#include "mojo/public/cpp/bindings/receiver.h"
#include "third_party/blink/public/mojom/disk_allocator.mojom-blink.h"
#include "third_party/blink/renderer/platform/allow_discouraged_type.h"
#include "third_party/blink/renderer/platform/platform_export.h"
#include "third_party/blink/renderer/platform/wtf/threading.h"

namespace blink {

class DiskDataMetadata;
class ReservedChunk;

// Stores data onto a single file.
//
// The file is provided after construction. As a consequence, the allocator
// initially does not accept writes, that is |Write()| returns nullptr. It may
// also become not usable later, for instance if disk space is no longer
// available.
//
// Threading:
// - Reads and writes can be done from any thread.
// - public methods are thread-safe, and unless otherwise noted, can be called
//   from any thread.
class PLATFORM_EXPORT DiskDataAllocator : public mojom::blink::DiskAllocator { … };

}  // namespace blink
#endif  // THIRD_PARTY_BLINK_RENDERER_PLATFORM_DISK_DATA_ALLOCATOR_H_