chromium/content/browser/font_access/font_enumeration_cache.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 CONTENT_BROWSER_FONT_ACCESS_FONT_ENUMERATION_CACHE_H_
#define CONTENT_BROWSER_FONT_ACCESS_FONT_ENUMERATION_CACHE_H_

#include <memory>
#include <optional>
#include <string>

#include "base/memory/read_only_shared_memory_region.h"
#include "base/memory/scoped_refptr.h"
#include "base/sequence_checker.h"
#include "base/synchronization/atomic_flag.h"
#include "base/task/deferred_sequenced_task_runner.h"
#include "base/task/sequenced_task_runner.h"
#include "base/thread_annotations.h"
#include "base/threading/sequence_bound.h"
#include "base/types/pass_key.h"
#include "content/common/content_export.h"
#include "third_party/blink/public/common/font_access/font_enumeration_table.pb.h"
#include "third_party/blink/public/mojom/font_access/font_access.mojom.h"

namespace content {

class FontEnumerationDataSource;

struct CONTENT_EXPORT FontEnumerationData { … };

// Caches font enumeration data, and serves it as a ReadOnlySharedMemoryRegion.
//
// This class is not thread-safe. Each instance must be accessed from a single
// sequence, which must allow blocking.
class CONTENT_EXPORT FontEnumerationCache { … };

}  // namespace content

#endif  // CONTENT_BROWSER_FONT_ACCESS_FONT_ENUMERATION_CACHE_H_