summaryrefslogtreecommitdiffstats
path: root/dom/storage/DOMStorageIPC.h
blob: 391b3addfa4b9c7d30c925a316f0ea758a204dde (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
 * License, v. 2.0. If a copy of the MPL was not distributed with this
 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */

#ifndef nsDOMStorageIPC_h___
#define nsDOMStorageIPC_h___

#include "mozilla/dom/PStorageChild.h"
#include "mozilla/dom/PStorageParent.h"
#include "DOMStorageDBThread.h"
#include "DOMStorageCache.h"
#include "DOMStorageObserver.h"
#include "mozilla/Mutex.h"
#include "nsAutoPtr.h"

namespace mozilla {

class OriginAttributesPattern;

namespace dom {

class DOMLocalStorageManager;

// Child side of the IPC protocol, exposes as DB interface but
// is responsible to send all requests to the parent process
// and expects asynchronous answers. Those are then transparently
// forwarded back to consumers on the child process.
class DOMStorageDBChild final : public DOMStorageDBBridge
                              , public PStorageChild
{
  virtual ~DOMStorageDBChild();

public:
  explicit DOMStorageDBChild(DOMLocalStorageManager* aManager);

  NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
  NS_IMETHOD_(MozExternalRefCountType) Release(void);

  void AddIPDLReference();
  void ReleaseIPDLReference();

  virtual nsresult Init();
  virtual nsresult Shutdown();

  virtual void AsyncPreload(DOMStorageCacheBridge* aCache, bool aPriority = false);
  virtual void AsyncGetUsage(DOMStorageUsageBridge* aUsage);

  virtual void SyncPreload(DOMStorageCacheBridge* aCache, bool aForceSync = false);

  virtual nsresult AsyncAddItem(DOMStorageCacheBridge* aCache, const nsAString& aKey, const nsAString& aValue);
  virtual nsresult AsyncUpdateItem(DOMStorageCacheBridge* aCache, const nsAString& aKey, const nsAString& aValue);
  virtual nsresult AsyncRemoveItem(DOMStorageCacheBridge* aCache, const nsAString& aKey);
  virtual nsresult AsyncClear(DOMStorageCacheBridge* aCache);

  virtual void AsyncClearAll()
  {
    if (mOriginsHavingData) {
      mOriginsHavingData->Clear(); /* NO-OP on the child process otherwise */
    }
  }

  virtual void AsyncClearMatchingOrigin(const nsACString& aOriginNoSuffix)
    { /* NO-OP on the child process */ }

  virtual void AsyncClearMatchingOriginAttributes(const OriginAttributesPattern& aPattern)
    { /* NO-OP on the child process */ }

  virtual void AsyncFlush()
    { SendAsyncFlush(); }

  virtual bool ShouldPreloadOrigin(const nsACString& aOriginNoSuffix);
  virtual void GetOriginsHavingData(InfallibleTArray<nsCString>* aOrigins)
    { NS_NOTREACHED("Not implemented for child process"); }

private:
  bool RecvObserve(const nsCString& aTopic,
                   const nsString& aOriginAttributesPattern,
                   const nsCString& aOriginScope);
  bool RecvLoadItem(const nsCString& aOriginSuffix,
                    const nsCString& aOriginNoSuffix,
                    const nsString& aKey,
                    const nsString& aValue);
  bool RecvLoadDone(const nsCString& aOriginSuffix,
                    const nsCString& aOriginNoSuffix,
                    const nsresult& aRv);
  bool RecvOriginsHavingData(nsTArray<nsCString>&& aOrigins);
  bool RecvLoadUsage(const nsCString& aOriginNoSuffix,
                     const int64_t& aUsage);
  bool RecvError(const nsresult& aRv);

  nsTHashtable<nsCStringHashKey>& OriginsHavingData();

  ThreadSafeAutoRefCnt mRefCnt;
  NS_DECL_OWNINGTHREAD

  // Held to get caches to forward answers to.
  RefPtr<DOMLocalStorageManager> mManager;

  // Origins having data hash, for optimization purposes only
  nsAutoPtr<nsTHashtable<nsCStringHashKey>> mOriginsHavingData;

  // List of caches waiting for preload.  This ensures the contract that
  // AsyncPreload call references the cache for time of the preload.
  nsTHashtable<nsRefPtrHashKey<DOMStorageCacheBridge>> mLoadingCaches;

  // Status of the remote database
  nsresult mStatus;

  bool mIPCOpen;
};


// Receives async requests from child processes and is responsible
// to send back responses from the DB thread.  Exposes as a fake
// DOMStorageCache consumer.
// Also responsible for forwardning all chrome operation notifications
// such as cookie cleaning etc to the child process.
class DOMStorageDBParent final : public PStorageParent
                               , public DOMStorageObserverSink
{
  virtual ~DOMStorageDBParent();

public:
  DOMStorageDBParent();

  NS_IMETHOD_(MozExternalRefCountType) AddRef(void);
  NS_IMETHOD_(MozExternalRefCountType) Release(void);

  void AddIPDLReference();
  void ReleaseIPDLReference();

  bool IPCOpen() { return mIPCOpen; }

public:
  // Fake cache class receiving async callbacks from DB thread, sending
  // them back to appropriate cache object on the child process.
  class CacheParentBridge : public DOMStorageCacheBridge {
  public:
    CacheParentBridge(DOMStorageDBParent* aParentDB,
                      const nsACString& aOriginSuffix,
                      const nsACString& aOriginNoSuffix)
      : mParent(aParentDB)
      , mOriginSuffix(aOriginSuffix), mOriginNoSuffix(aOriginNoSuffix)
      , mLoaded(false), mLoadedCount(0) {}
    virtual ~CacheParentBridge() {}

    // DOMStorageCacheBridge
    virtual const nsCString Origin() const;
    virtual const nsCString& OriginNoSuffix() const
      { return mOriginNoSuffix; }
    virtual const nsCString& OriginSuffix() const
      { return mOriginSuffix; }
    virtual bool Loaded()
      { return mLoaded; }
    virtual uint32_t LoadedCount()
      { return mLoadedCount; }

    virtual bool LoadItem(const nsAString& aKey, const nsString& aValue);
    virtual void LoadDone(nsresult aRv);
    virtual void LoadWait();

  private:
    RefPtr<DOMStorageDBParent> mParent;
    nsCString mOriginSuffix, mOriginNoSuffix;
    bool mLoaded;
    uint32_t mLoadedCount;
  };

  // Fake usage class receiving async callbacks from DB thread
  class UsageParentBridge : public DOMStorageUsageBridge
  {
  public:
    UsageParentBridge(DOMStorageDBParent* aParentDB, const nsACString& aOriginScope)
      : mParent(aParentDB), mOriginScope(aOriginScope) {}
    virtual ~UsageParentBridge() {}

    // DOMStorageUsageBridge
    virtual const nsCString& OriginScope() { return mOriginScope; }
    virtual void LoadUsage(const int64_t usage);

  private:
    RefPtr<DOMStorageDBParent> mParent;
    nsCString mOriginScope;
  };

private:
  // IPC
  virtual void ActorDestroy(ActorDestroyReason aWhy) override;
  bool RecvAsyncPreload(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const bool& aPriority) override;
  bool RecvPreload(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const uint32_t& aAlreadyLoadedCount,
                   InfallibleTArray<nsString>* aKeys, InfallibleTArray<nsString>* aValues,
                   nsresult* aRv) override;
  bool RecvAsyncGetUsage(const nsCString& aOriginNoSuffix) override;
  bool RecvAsyncAddItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey, const nsString& aValue) override;
  bool RecvAsyncUpdateItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey, const nsString& aValue) override;
  bool RecvAsyncRemoveItem(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix, const nsString& aKey) override;
  bool RecvAsyncClear(const nsCString& aOriginSuffix, const nsCString& aOriginNoSuffix) override;
  bool RecvAsyncFlush() override;

  // DOMStorageObserverSink
  virtual nsresult Observe(const char* aTopic, const nsAString& aOriginAttrPattern, const nsACString& aOriginScope) override;

private:
  CacheParentBridge* NewCache(const nsACString& aOriginSuffix, const nsACString& aOriginNoSuffix);

  ThreadSafeAutoRefCnt mRefCnt;
  NS_DECL_OWNINGTHREAD

  // True when IPC channel is open and Send*() methods are OK to use.
  bool mIPCOpen;
};

} // namespace dom
} // namespace mozilla

#endif