/src/mozilla-central/dom/media/gmp/GMPMemoryStorage.cpp
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1 | | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ |
2 | | /* This Source Code Form is subject to the terms of the Mozilla Public |
3 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
4 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
5 | | |
6 | | #include "GMPStorage.h" |
7 | | #include "nsClassHashtable.h" |
8 | | |
9 | | namespace mozilla { |
10 | | namespace gmp { |
11 | | |
12 | | class GMPMemoryStorage : public GMPStorage { |
13 | | public: |
14 | | GMPErr Open(const nsCString& aRecordName) override |
15 | 0 | { |
16 | 0 | MOZ_ASSERT(!IsOpen(aRecordName)); |
17 | 0 |
|
18 | 0 | Record* record = nullptr; |
19 | 0 | if (!mRecords.Get(aRecordName, &record)) { |
20 | 0 | record = new Record(); |
21 | 0 | mRecords.Put(aRecordName, record); |
22 | 0 | } |
23 | 0 | record->mIsOpen = true; |
24 | 0 | return GMPNoErr; |
25 | 0 | } |
26 | | |
27 | 0 | bool IsOpen(const nsCString& aRecordName) const override { |
28 | 0 | const Record* record = mRecords.Get(aRecordName); |
29 | 0 | if (!record) { |
30 | 0 | return false; |
31 | 0 | } |
32 | 0 | return record->mIsOpen; |
33 | 0 | } |
34 | | |
35 | | GMPErr Read(const nsCString& aRecordName, |
36 | | nsTArray<uint8_t>& aOutBytes) override |
37 | 0 | { |
38 | 0 | const Record* record = mRecords.Get(aRecordName); |
39 | 0 | if (!record) { |
40 | 0 | return GMPGenericErr; |
41 | 0 | } |
42 | 0 | aOutBytes = record->mData; |
43 | 0 | return GMPNoErr; |
44 | 0 | } |
45 | | |
46 | | GMPErr Write(const nsCString& aRecordName, |
47 | | const nsTArray<uint8_t>& aBytes) override |
48 | 0 | { |
49 | 0 | Record* record = nullptr; |
50 | 0 | if (!mRecords.Get(aRecordName, &record)) { |
51 | 0 | return GMPClosedErr; |
52 | 0 | } |
53 | 0 | record->mData = aBytes; |
54 | 0 | return GMPNoErr; |
55 | 0 | } |
56 | | |
57 | | void Close(const nsCString& aRecordName) override |
58 | 0 | { |
59 | 0 | Record* record = nullptr; |
60 | 0 | if (!mRecords.Get(aRecordName, &record)) { |
61 | 0 | return; |
62 | 0 | } |
63 | 0 | if (!record->mData.Length()) { |
64 | 0 | // Record is empty, delete. |
65 | 0 | mRecords.Remove(aRecordName); |
66 | 0 | } else { |
67 | 0 | record->mIsOpen = false; |
68 | 0 | } |
69 | 0 | } |
70 | | |
71 | | private: |
72 | | |
73 | | struct Record { |
74 | | nsTArray<uint8_t> mData; |
75 | | bool mIsOpen = false; |
76 | | }; |
77 | | |
78 | | nsClassHashtable<nsCStringHashKey, Record> mRecords; |
79 | | }; |
80 | | |
81 | | already_AddRefed<GMPStorage> CreateGMPMemoryStorage() |
82 | 0 | { |
83 | 0 | return RefPtr<GMPStorage>(new GMPMemoryStorage()).forget(); |
84 | 0 | } |
85 | | |
86 | | } // namespace gmp |
87 | | } // namespace mozilla |