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// Copyright 2019 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#ifndef CHROME_BROWSER_MEMORY_ENTERPRISE_MEMORY_LIMIT_PREF_OBSERVER_H_
#define CHROME_BROWSER_MEMORY_ENTERPRISE_MEMORY_LIMIT_PREF_OBSERVER_H_
#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "chrome/browser/memory/enterprise_memory_limit_evaluator.h"
#include "components/prefs/pref_change_registrar.h"
#include "components/prefs/pref_registry_simple.h"
#include "components/prefs/pref_service.h"
namespace memory {
// Tracks changes to the TotalMemoryLimitMb policy and starts/stops/updates
// the limit of its EnterpriseMemoryLimitEvaluator accordingly.
class EnterpriseMemoryLimitPrefObserver {
public:
explicit EnterpriseMemoryLimitPrefObserver(PrefService* pref_service);
~EnterpriseMemoryLimitPrefObserver();
// Returns true if the current platform is supported, false otherwise.
static bool PlatformIsSupported();
// Registers the TotalMemoryLimitMb pref with the provided PrefRegistry.
// Should only be called by RegisterLocalState() in
// chrome/browser/prefs/browser_prefs.cc.
static void RegisterPrefs(PrefRegistrySimple* registry);
private:
// Gets the value of the TotalMemoryLimitMb preference and updates the
// evaluator accordingly.
void GetPref();
// PrefService from which we get the preference upon notification that the
// preference has changed.
raw_ptr<PrefService> pref_service_;
// Registrar which notifies us of changes to the preference.
PrefChangeRegistrar pref_change_registrar_;
// Evaluator which sends its votes to the MultiSourceMemoryPressureMonitor.
// Should only be running when the preference is enabled.
std::unique_ptr<EnterpriseMemoryLimitEvaluator> evaluator_;
SEQUENCE_CHECKER(sequence_checker_);
};
} // namespace memory
#endif // CHROME_BROWSER_MEMORY_ENTERPRISE_MEMORY_LIMIT_PREF_OBSERVER_H_
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