chromium/components/visitedlink/browser/partitioned_visitedlink_writer.h

// Copyright 2024 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_VISITEDLINK_BROWSER_PARTITIONED_VISITEDLINK_WRITER_H_
#define COMPONENTS_VISITEDLINK_BROWSER_PARTITIONED_VISITEDLINK_WRITER_H_

#include <map>
#include <set>

#include "base/memory/read_only_shared_memory_region.h"
#include "components/visitedlink/common/visitedlink_common.h"
#include "components/visitedlink/core/visited_link.h"
#include "content/public/browser/browser_context.h"

namespace base {
class WritableSharedMemoryMapping;
}

namespace url {
class Origin;
}

namespace visitedlink {

class VisitedLinkDelegate;

// PartitionedVisitedLinkWriter constructs and writes to the partitioned
// :visited links hashtable. There should only be one instance of
// PartitionedVisitedLinkWriter, and it must be initialized before use.
//
// Much of this code is similar to or identical to the (unpartitioned)
// VisitedLinkWriter class. PartitionedVisitedLinkWriter does not persist to
// disk, the code has been "forked" into a separate class that relies on the
// HistoryService's VisitedLinkDatabase to persist partitioned :visited link
// browsing history across sessions. Once constructed from the
// VisitedLinkDatabase, the partitioned hashtable is stored in a shared memory
// instance.
class PartitionedVisitedLinkWriter : public VisitedLinkCommon { … };

// NOTE: These methods are defined inline here, so we can share the compilation
// of partitioned_visitedlink_writer.cc between the browser and the unit/perf
// tests.

#if defined(UNIT_TEST) || defined(PERF_TEST) || !defined(NDEBUG)
inline void PartitionedVisitedLinkWriter::DebugValidate() { … }
#endif

}  // namespace visitedlink

#endif  // COMPONENTS_VISITEDLINK_BROWSER_PARTITIONED_VISITEDLINK_WRITER_H_