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1 // Copyright 2013 The Chromium Authors. All rights reserved. | 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 | 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 WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_H_ | 5 #include "storage/browser/fileapi/quota/quota_reservation.h" |
6 #define WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_H_ | |
7 | |
8 #include "base/basictypes.h" | |
9 #include "base/files/file.h" | |
10 #include "base/files/file_path.h" | |
11 #include "base/memory/ref_counted.h" | |
12 #include "base/memory/weak_ptr.h" | |
13 #include "webkit/browser/fileapi/quota/quota_reservation_manager.h" | |
14 #include "webkit/browser/storage_browser_export.h" | |
15 #include "webkit/common/fileapi/file_system_types.h" | |
16 | |
17 class GURL; | |
18 | |
19 namespace storage { | |
20 | |
21 class QuotaReservationBuffer; | |
22 class OpenFileHandle; | |
23 | |
24 // Represents a unit of quota reservation. | |
25 class STORAGE_EXPORT QuotaReservation | |
26 : public base::RefCounted<QuotaReservation> { | |
27 public: | |
28 typedef base::Callback<void(base::File::Error error)> StatusCallback; | |
29 | |
30 // Reclaims unused quota and reserves another |size| of quota. So that the | |
31 // resulting new |remaining_quota_| will be same as |size| as far as available | |
32 // space is enough. |remaining_quota_| may be less than |size| if there is | |
33 // not enough space available. | |
34 // Invokes |callback| upon completion. | |
35 void RefreshReservation(int64 size, const StatusCallback& callback); | |
36 | |
37 // Associates |platform_path| to the QuotaReservation instance. | |
38 // Returns an OpenFileHandle instance that represents a quota managed file. | |
39 scoped_ptr<OpenFileHandle> GetOpenFileHandle( | |
40 const base::FilePath& platform_path); | |
41 | |
42 // Should be called when the associated client is crashed. | |
43 // This implies the client can no longer report its consumption of the | |
44 // reserved quota. | |
45 // QuotaReservation puts all remaining quota to the QuotaReservationBuffer, so | |
46 // that the remaining quota will be reclaimed after all open files associated | |
47 // to the origin and type. | |
48 void OnClientCrash(); | |
49 | |
50 // Consumes |size| of reserved quota for a associated file. | |
51 // Consumed quota is sent to associated QuotaReservationBuffer for staging. | |
52 void ConsumeReservation(int64 size); | |
53 | |
54 // Returns amount of unused reserved quota. | |
55 int64 remaining_quota() const { return remaining_quota_; } | |
56 | |
57 QuotaReservationManager* reservation_manager(); | |
58 const GURL& origin() const; | |
59 FileSystemType type() const; | |
60 | |
61 private: | |
62 friend class QuotaReservationBuffer; | |
63 | |
64 // Use QuotaReservationManager as the entry point. | |
65 explicit QuotaReservation(QuotaReservationBuffer* reservation_buffer); | |
66 | |
67 friend class base::RefCounted<QuotaReservation>; | |
68 virtual ~QuotaReservation(); | |
69 | |
70 static bool AdaptDidUpdateReservedQuota( | |
71 const base::WeakPtr<QuotaReservation>& reservation, | |
72 int64 previous_size, | |
73 const StatusCallback& callback, | |
74 base::File::Error error, | |
75 int64 delta); | |
76 bool DidUpdateReservedQuota(int64 previous_size, | |
77 const StatusCallback& callback, | |
78 base::File::Error error, | |
79 int64 delta); | |
80 | |
81 bool client_crashed_; | |
82 bool running_refresh_request_; | |
83 int64 remaining_quota_; | |
84 | |
85 scoped_refptr<QuotaReservationBuffer> reservation_buffer_; | |
86 | |
87 base::SequenceChecker sequence_checker_; | |
88 base::WeakPtrFactory<QuotaReservation> weak_ptr_factory_; | |
89 | |
90 DISALLOW_COPY_AND_ASSIGN(QuotaReservation); | |
91 }; | |
92 | |
93 } // namespace storage | |
94 | |
95 #endif // WEBKIT_BROWSER_FILEAPI_QUOTA_QUOTA_RESERVATION_H_ | |
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