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1 /* |
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2 * Copyright (C) 2007, 2008 Apple Inc. All rights reserved. |
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3 * |
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4 * Redistribution and use in source and binary forms, with or without |
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5 * modification, are permitted provided that the following conditions |
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6 * are met: |
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7 * |
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8 * 1. Redistributions of source code must retain the above copyright |
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9 * notice, this list of conditions and the following disclaimer. |
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10 * 2. Redistributions in binary form must reproduce the above copyright |
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11 * notice, this list of conditions and the following disclaimer in the |
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12 * documentation and/or other materials provided with the distribution. |
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13 * 3. Neither the name of Apple Computer, Inc. ("Apple") nor the names of |
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14 * its contributors may be used to endorse or promote products derived |
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15 * from this software without specific prior written permission. |
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16 * |
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17 * THIS SOFTWARE IS PROVIDED BY APPLE AND ITS CONTRIBUTORS "AS IS" AND ANY |
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18 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED |
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19 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE |
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20 * DISCLAIMED. IN NO EVENT SHALL APPLE OR ITS CONTRIBUTORS BE LIABLE FOR ANY |
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21 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES |
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22 * (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
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23 * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND |
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24 * ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT |
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25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF |
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26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
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27 */ |
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28 #ifndef DatabaseThread_h |
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29 #define DatabaseThread_h |
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30 |
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31 #if ENABLE(DATABASE) |
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32 #include <wtf/Deque.h> |
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33 #include <wtf/HashMap.h> |
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34 #include <wtf/HashSet.h> |
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35 #include <wtf/MessageQueue.h> |
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36 #include <wtf/OwnPtr.h> |
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37 #include <wtf/PassOwnPtr.h> |
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38 #include <wtf/PassRefPtr.h> |
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39 #include <wtf/RefPtr.h> |
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40 #include <wtf/Threading.h> |
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41 |
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42 namespace WebCore { |
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43 |
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44 class Database; |
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45 class DatabaseTask; |
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46 class DatabaseTaskSynchronizer; |
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47 class Document; |
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48 class SQLTransactionClient; |
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49 class SQLTransactionCoordinator; |
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50 |
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51 class DatabaseThread : public ThreadSafeShared<DatabaseThread> { |
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52 public: |
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53 static PassRefPtr<DatabaseThread> create() { return adoptRef(new DatabaseThread); } |
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54 ~DatabaseThread(); |
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55 |
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56 bool start(); |
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57 void requestTermination(DatabaseTaskSynchronizer* cleanupSync); |
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58 bool terminationRequested() const; |
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59 |
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60 void scheduleTask(PassOwnPtr<DatabaseTask>); |
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61 void scheduleImmediateTask(PassOwnPtr<DatabaseTask>); // This just adds the task to the front of the queue - the caller needs to be extremely careful not to create deadlocks when waiting for completion. |
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62 void unscheduleDatabaseTasks(Database*); |
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63 |
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64 void recordDatabaseOpen(Database*); |
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65 void recordDatabaseClosed(Database*); |
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66 ThreadIdentifier getThreadID() { return m_threadID; } |
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67 |
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68 SQLTransactionClient* transactionClient() { return m_transactionClient.get(); } |
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69 SQLTransactionCoordinator* transactionCoordinator() { return m_transactionCoordinator.get(); } |
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70 |
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71 private: |
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72 DatabaseThread(); |
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73 |
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74 static void* databaseThreadStart(void*); |
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75 void* databaseThread(); |
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76 |
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77 Mutex m_threadCreationMutex; |
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78 ThreadIdentifier m_threadID; |
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79 RefPtr<DatabaseThread> m_selfRef; |
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80 |
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81 MessageQueue<DatabaseTask> m_queue; |
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82 |
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83 // This set keeps track of the open databases that have been used on this thread. |
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84 typedef HashSet<RefPtr<Database> > DatabaseSet; |
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85 DatabaseSet m_openDatabaseSet; |
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86 |
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87 OwnPtr<SQLTransactionClient> m_transactionClient; |
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88 OwnPtr<SQLTransactionCoordinator> m_transactionCoordinator; |
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89 DatabaseTaskSynchronizer* m_cleanupSync; |
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90 }; |
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91 |
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92 } // namespace WebCore |
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93 |
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94 #endif // ENABLE(DATABASE) |
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95 #endif // DatabaseThread_h |