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30 #include "modules/webdatabase/DatabaseThread.h"
32 #include "modules/webdatabase/Database.h"
33 #include "modules/webdatabase/DatabaseTask.h"
34 #include "modules/webdatabase/SQLTransactionClient.h"
35 #include "modules/webdatabase/SQLTransactionCoordinator.h"
36 #include "platform/Logging.h"
37 #include "platform/heap/glue/MessageLoopInterruptor.h"
38 #include "platform/heap/glue/PendingGCRunner.h"
39 #include "public/platform/Platform.h"
43 DatabaseThread::DatabaseThread()
44 : m_transactionClient(adoptPtr(new SQLTransactionClient()))
45 , m_transactionCoordinator(new SQLTransactionCoordinator())
47 , m_terminationRequested(false)
51 DatabaseThread::~DatabaseThread()
53 ASSERT(m_openDatabaseSet.isEmpty());
57 void DatabaseThread::trace(Visitor* visitor)
59 visitor->trace(m_openDatabaseSet);
60 visitor->trace(m_transactionCoordinator);
63 void DatabaseThread::start()
67 m_thread = WebThreadSupportingGC::create("WebCore: Database");
68 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::setupDatabaseThread, this)));
71 void DatabaseThread::setupDatabaseThread()
76 void DatabaseThread::terminate()
78 TaskSynchronizer sync;
80 MutexLocker lock(m_terminationRequestedMutex);
81 ASSERT(!m_terminationRequested);
82 m_terminationRequested = true;
83 m_cleanupSync = &sync;
84 WTF_LOG(StorageAPI, "DatabaseThread %p was asked to terminate\n", this);
85 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::cleanupDatabaseThread, this)));
87 sync.waitForTaskCompletion();
88 // The WebThread destructor blocks until all the tasks of the database
89 // thread are processed. However, it shouldn't block at all because
90 // the database thread has already finished processing the cleanup task.
94 bool DatabaseThread::terminationRequested() const
96 MutexLocker lock(m_terminationRequestedMutex);
97 return m_terminationRequested;
100 void DatabaseThread::cleanupDatabaseThread()
102 WTF_LOG(StorageAPI, "Cleaning up DatabaseThread %p", this);
104 // Clean up the list of all pending transactions on this database thread
105 m_transactionCoordinator->shutdown();
107 // Close the databases that we ran transactions on. This ensures that if any transactions are still open, they are rolled back and we don't leave the database in an
108 // inconsistent or locked state.
109 if (m_openDatabaseSet.size() > 0) {
110 // As the call to close will modify the original set, we must take a copy to iterate over.
111 HeapHashSet<Member<Database> > openSetCopy;
112 openSetCopy.swap(m_openDatabaseSet);
113 HeapHashSet<Member<Database> >::iterator end = openSetCopy.end();
114 for (HeapHashSet<Member<Database> >::iterator it = openSetCopy.begin(); it != end; ++it)
117 m_openDatabaseSet.clear();
119 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::cleanupDatabaseThreadCompleted, this)));
122 void DatabaseThread::cleanupDatabaseThreadCompleted()
124 m_thread->detachGC();
125 if (m_cleanupSync) // Someone wanted to know when we were done cleaning up.
126 m_cleanupSync->taskCompleted();
129 void DatabaseThread::recordDatabaseOpen(Database* database)
131 ASSERT(isDatabaseThread());
133 ASSERT(!m_openDatabaseSet.contains(database));
134 MutexLocker lock(m_terminationRequestedMutex);
135 if (!m_terminationRequested)
136 m_openDatabaseSet.add(database);
139 void DatabaseThread::recordDatabaseClosed(Database* database)
141 ASSERT(isDatabaseThread());
143 ASSERT(m_terminationRequested || m_openDatabaseSet.contains(database));
144 m_openDatabaseSet.remove(database);
147 bool DatabaseThread::isDatabaseOpen(Database* database)
149 ASSERT(isDatabaseThread());
151 MutexLocker lock(m_terminationRequestedMutex);
152 return !m_terminationRequested && m_openDatabaseSet.contains(database);
155 void DatabaseThread::scheduleTask(PassOwnPtr<DatabaseTask> task)
158 ASSERT(!terminationRequested());
159 // WebThread takes ownership of the task.
160 m_thread->postTask(task.leakPtr());