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Side by Side Diff: components/sync/syncable/syncable_delete_journal.h

Issue 2130453004: [Sync] Move //sync to //components/sync. (Closed) Base URL: https://chromium.googlesource.com/chromium/src.git@master
Patch Set: Rebase. Created 4 years, 4 months ago
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1 // Copyright 2013 The Chromium Authors. All rights reserved. 1 // Copyright 2013 The Chromium Authors. All rights reserved.
2 // Use of this source code is governed by a BSD-style license that can be 2 // Use of this source code is governed by a BSD-style license that can be
3 // found in the LICENSE file. 3 // found in the LICENSE file.
4 4
5 #ifndef SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_ 5 #ifndef COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_
6 #define SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_ 6 #define COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_
7 7
8 #include <stddef.h> 8 #include <stddef.h>
9 9
10 #include <set> 10 #include <set>
11 11
12 #include "base/gtest_prod_util.h" 12 #include "base/gtest_prod_util.h"
13 #include "base/macros.h" 13 #include "base/macros.h"
14 #include "base/synchronization/lock.h" 14 #include "base/synchronization/lock.h"
15 #include "sync/base/sync_export.h" 15 #include "components/sync/base/sync_export.h"
16 #include "sync/syncable/metahandle_set.h" 16 #include "components/sync/syncable/metahandle_set.h"
17 #include "sync/syncable/syncable-inl.h" 17 #include "components/sync/syncable/syncable-inl.h"
18 18
19 namespace syncer { 19 namespace syncer {
20 namespace syncable { 20 namespace syncable {
21 21
22 class BaseTransaction; 22 class BaseTransaction;
23 struct EntryKernel; 23 struct EntryKernel;
24 24
25 typedef std::set<const EntryKernel*, LessField<IdField, ID> > JournalIndex; 25 typedef std::set<const EntryKernel*, LessField<IdField, ID>> JournalIndex;
26 26
27 // DeleteJournal manages deleted entries that are not in sync directory until 27 // DeleteJournal manages deleted entries that are not in sync directory until
28 // it's safe to drop them after the deletion is confirmed with native models. 28 // it's safe to drop them after the deletion is confirmed with native models.
29 // DeleteJournal is thread-safe and can be accessed on any thread. Has to hold 29 // DeleteJournal is thread-safe and can be accessed on any thread. Has to hold
30 // a valid transaction object when calling methods of DeleteJournal, thus each 30 // a valid transaction object when calling methods of DeleteJournal, thus each
31 // method requires a non-null |trans| parameter. 31 // method requires a non-null |trans| parameter.
32 class SYNC_EXPORT DeleteJournal { 32 class SYNC_EXPORT DeleteJournal {
33 public: 33 public:
34 // Initialize |delete_journals_| using |intitial_journal|, whose content is 34 // Initialize |delete_journals_| using |intitial_journal|, whose content is
35 // destroyed during initialization. 35 // destroyed during initialization.
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46 const EntryKernel& entry); 46 const EntryKernel& entry);
47 47
48 // Return entries of specified type in |delete_journals_|. This should be 48 // Return entries of specified type in |delete_journals_|. This should be
49 // called ONCE in model association. |deleted_entries| can be used to 49 // called ONCE in model association. |deleted_entries| can be used to
50 // detect deleted sync data that's not persisted in native model to 50 // detect deleted sync data that's not persisted in native model to
51 // prevent back-from-dead problem. |deleted_entries| are only valid during 51 // prevent back-from-dead problem. |deleted_entries| are only valid during
52 // lifetime of |trans|. |type| is added to |passive_delete_journal_types_| to 52 // lifetime of |trans|. |type| is added to |passive_delete_journal_types_| to
53 // enable periodically saving/clearing of delete journals of |type| because 53 // enable periodically saving/clearing of delete journals of |type| because
54 // new journals added later are not needed until next model association. 54 // new journals added later are not needed until next model association.
55 // Can be called on any thread. 55 // Can be called on any thread.
56 void GetDeleteJournals(BaseTransaction* trans, ModelType type, 56 void GetDeleteJournals(BaseTransaction* trans,
57 ModelType type,
57 EntryKernelSet* deleted_entries); 58 EntryKernelSet* deleted_entries);
58 59
59 // Purge entries of specified type in |delete_journals_| if their handles are 60 // Purge entries of specified type in |delete_journals_| if their handles are
60 // in |to_purge|. This should be called after model association and 61 // in |to_purge|. This should be called after model association and
61 // |to_purge| should contain handles of the entries whose deletions are 62 // |to_purge| should contain handles of the entries whose deletions are
62 // confirmed in native model. Can be called on any thread. 63 // confirmed in native model. Can be called on any thread.
63 void PurgeDeleteJournals(BaseTransaction* trans, 64 void PurgeDeleteJournals(BaseTransaction* trans,
64 const MetahandleSet& to_purge); 65 const MetahandleSet& to_purge);
65 66
66 // Move entries in |delete_journals_| whose types are in 67 // Move entries in |delete_journals_| whose types are in
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97 // Delete journals of these types can be cleared from memory after being 98 // Delete journals of these types can be cleared from memory after being
98 // saved to database. 99 // saved to database.
99 ModelTypeSet passive_delete_journal_types_; 100 ModelTypeSet passive_delete_journal_types_;
100 101
101 DISALLOW_COPY_AND_ASSIGN(DeleteJournal); 102 DISALLOW_COPY_AND_ASSIGN(DeleteJournal);
102 }; 103 };
103 104
104 } // namespace syncable 105 } // namespace syncable
105 } // namespace syncer 106 } // namespace syncer
106 107
107 #endif // SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_ 108 #endif // COMPONENTS_SYNC_SYNCABLE_SYNCABLE_DELETE_JOURNAL_H_
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