chromium/src/third_party/blink/renderer/modules/webdatabase/quota_tracker.h

/*
 * Copyright (C) 2009 Google Inc. All rights reserved.
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 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 *     * Redistributions of source code must retain the above copyright
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 * in the documentation and/or other materials provided with the
 * distribution.
 *     * Neither the name of Google Inc. nor the names of its
 * contributors may be used to endorse or promote products derived from
 * this software without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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#ifndef THIRD_PARTY_BLINK_RENDERER_MODULES_WEBDATABASE_QUOTA_TRACKER_H_
#define THIRD_PARTY_BLINK_RENDERER_MODULES_WEBDATABASE_QUOTA_TRACKER_H_

#include "base/macros.h"
#include "third_party/blink/renderer/modules/modules_export.h"
#include "third_party/blink/renderer/platform/wtf/hash_map.h"
#include "third_party/blink/renderer/platform/wtf/text/string_hash.h"
#include "third_party/blink/renderer/platform/wtf/text/wtf_string.h"
#include "third_party/blink/renderer/platform/wtf/threading_primitives.h"

namespace blink {

class SecurityOrigin;

class MODULES_EXPORT QuotaTracker {
  USING_FAST_MALLOC(QuotaTracker);

 public:
  static QuotaTracker& Instance();

  void GetDatabaseSizeAndSpaceAvailableToOrigin(const SecurityOrigin*,
                                                const String& database_name,
                                                uint64_t* database_size,
                                                uint64_t* space_available);
  void UpdateDatabaseSize(const SecurityOrigin*,
                          const String& database_name,
                          uint64_t database_size);

 private:
  QuotaTracker() = default;

  typedef HashMap<String, uint64_t> SizeMap;
  HashMap<String, SizeMap> database_sizes_;
  Mutex data_guard_;

  DISALLOW_COPY_AND_ASSIGN(QuotaTracker);
};

}  // namespace blink

#endif  // THIRD_PARTY_BLINK_RENDERER_MODULES_WEBDATABASE_QUOTA_TRACKER_H_