/src/mozilla-central/storage/mozStorageAsyncStatementJSHelper.h
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1 | | /* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- |
2 | | * vim: sw=2 ts=2 et lcs=trail\:.,tab\:>~ : |
3 | | * This Source Code Form is subject to the terms of the Mozilla Public |
4 | | * License, v. 2.0. If a copy of the MPL was not distributed with this |
5 | | * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ |
6 | | |
7 | | #ifndef mozilla_storage_mozStorageAsyncStatementJSHelper_h_ |
8 | | #define mozilla_storage_mozStorageAsyncStatementJSHelper_h_ |
9 | | |
10 | | #include "nsIXPCScriptable.h" |
11 | | #include "nsIXPConnect.h" |
12 | | |
13 | | namespace mozilla { |
14 | | namespace storage { |
15 | | |
16 | | class AsyncStatement; |
17 | | class AsyncStatementParams; |
18 | | |
19 | | /** |
20 | | * A modified version of StatementJSHelper that only exposes the async-specific |
21 | | * 'params' helper. We do not expose 'row' or 'step' as they do not apply to |
22 | | * us. |
23 | | */ |
24 | | class AsyncStatementJSHelper : public nsIXPCScriptable |
25 | | { |
26 | | public: |
27 | | NS_DECL_ISUPPORTS |
28 | | NS_DECL_NSIXPCSCRIPTABLE |
29 | | |
30 | | private: |
31 | | nsresult getParams(AsyncStatement *, JSContext *, JSObject *, JS::Value *); |
32 | | }; |
33 | | |
34 | | /** |
35 | | * Wrapper used to clean up the references JS helpers hold to the statement. |
36 | | * For cycle-avoidance reasons they do not hold reference-counted references, |
37 | | * so it is important we do this. |
38 | | */ |
39 | | class AsyncStatementParamsHolder final : public nsISupports { |
40 | | public: |
41 | | NS_DECL_ISUPPORTS |
42 | | |
43 | | explicit AsyncStatementParamsHolder(AsyncStatementParams* aParams) |
44 | | : mParams(aParams) |
45 | 0 | { |
46 | 0 | } |
47 | | |
48 | 0 | AsyncStatementParams* Get() const { |
49 | 0 | MOZ_ASSERT(mParams); |
50 | 0 | return mParams; |
51 | 0 | } |
52 | | |
53 | | private: |
54 | | virtual ~AsyncStatementParamsHolder(); |
55 | | |
56 | | RefPtr<AsyncStatementParams> mParams; |
57 | | }; |
58 | | |
59 | | } // namespace storage |
60 | | } // namespace mozilla |
61 | | |
62 | | #endif // mozilla_storage_mozStorageAsyncStatementJSHelper_h_ |