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Side by Side Diff: sync/internal_api/sync_core_proxy_impl.h

Issue 351523003: sync: Mass rename of non-blocking sync classes (Closed) Base URL: svn://svn.chromium.org/chrome/trunk/src
Patch Set: const ref some smart pointers Created 6 years, 5 months ago
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1 // Copyright 2014 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file.
4
5 #ifndef SYNC_INTERNAL_API_SYNC_CORE_PROXY_IMPL_H_
6 #define SYNC_INTERNAL_API_SYNC_CORE_PROXY_IMPL_H_
7
8 #include "base/memory/scoped_ptr.h"
9 #include "base/memory/weak_ptr.h"
10 #include "base/sequenced_task_runner.h"
11 #include "sync/base/sync_export.h"
12 #include "sync/internal_api/public/base/model_type.h"
13 #include "sync/internal_api/public/sync_core_proxy.h"
14
15 namespace syncer {
16
17 class SyncCore;
18 class NonBlockingTypeProcessor;
19 struct DataTypeState;
20
21 // Encapsulates a reference to the sync core and the thread it's running on.
22 // Used by sync's data types to connect with the sync core.
23 //
24 // It is epxected that this object will be copied to and used on many different
25 // threads. It is small and safe to pass by value.
26 class SYNC_EXPORT_PRIVATE SyncCoreProxyImpl : public SyncCoreProxy {
27 public:
28 SyncCoreProxyImpl(
29 scoped_refptr<base::SequencedTaskRunner> sync_task_runner,
30 base::WeakPtr<SyncCore> sync_core);
31 virtual ~SyncCoreProxyImpl();
32
33 // Attempts to connect a non-blocking type to the sync core.
34 //
35 // This may fail under some unusual circumstances, like shutdown. Due to the
36 // nature of WeakPtrs and cross-thread communication, the caller will be
37 // unable to distinguish a slow success from failure.
38 //
39 // Must be called from the thread where the data type lives.
40 virtual void ConnectTypeToCore(
41 syncer::ModelType type,
42 const DataTypeState& data_type_state,
43 base::WeakPtr<NonBlockingTypeProcessor> type_processor) OVERRIDE;
44
45 // Disables syncing for the given type on the sync thread.
46 virtual void Disconnect(syncer::ModelType type) OVERRIDE;
47
48 virtual scoped_ptr<SyncCoreProxy> Clone() const OVERRIDE;
49
50 private:
51 // A SequencedTaskRunner representing the thread where the SyncCore lives.
52 scoped_refptr<base::SequencedTaskRunner> sync_task_runner_;
53
54 // The SyncCore this object is wrapping.
55 base::WeakPtr<SyncCore> sync_core_;
56 };
57
58 } // namespace syncer
59
60 #endif // SYNC_INTERNAL_API_SYNC_CORE_PROXY_IMPL_H_
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