chromium/components/keyed_service/core/keyed_service_base_factory.h

// Copyright 2014 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_KEYED_SERVICE_CORE_KEYED_SERVICE_BASE_FACTORY_H_
#define COMPONENTS_KEYED_SERVICE_CORE_KEYED_SERVICE_BASE_FACTORY_H_

#include "base/memory/raw_ptr.h"
#include "base/sequence_checker.h"
#include "components/keyed_service/core/dependency_node.h"
#include "components/keyed_service/core/keyed_service_export.h"

class DependencyManager;

namespace user_prefs {
class PrefRegistrySyncable;
}

// Base class for factories that take an opaque pointer and return some service.
// Not for direct usage, instead use descendent classes that deal with more
// specific context objects.
//
// This object describes general dependency management between factories while
// direct subclasses react to lifecycle events and implement memory management.
//
// All factories must have been created at least once before the context is
// created in order to work correctly (see crbug.com/1150733). The standard way
// to do this in a //content-based embedder is to call FooFactory::GetInstance()
// for each factory used by your embedder from your embedder's implementation of
// content::BrowserMainParts::PreMainMessageLoopRun().
class KEYED_SERVICE_EXPORT KeyedServiceBaseFactory : public DependencyNode { … };

#endif  // COMPONENTS_KEYED_SERVICE_CORE_KEYED_SERVICE_BASE_FACTORY_H_