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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(adoptPtrWillBeNoop(new SQLTransactionCoordinator()))
47 , m_terminationRequested(false)
51 DatabaseThread::~DatabaseThread()
53 ASSERT(m_openDatabaseSet.isEmpty());
57 void DatabaseThread::trace(Visitor* visitor)
60 visitor->trace(m_openDatabaseSet);
61 visitor->trace(m_transactionCoordinator);
65 void DatabaseThread::start()
69 m_thread = WebThreadSupportingGC::create("WebCore: Database");
70 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::setupDatabaseThread, this)));
73 void DatabaseThread::setupDatabaseThread()
78 void DatabaseThread::terminate()
80 TaskSynchronizer sync;
82 MutexLocker lock(m_terminationRequestedMutex);
83 ASSERT(!m_terminationRequested);
84 m_terminationRequested = true;
85 m_cleanupSync = &sync;
86 WTF_LOG(StorageAPI, "DatabaseThread %p was asked to terminate\n", this);
87 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::cleanupDatabaseThread, this)));
89 sync.waitForTaskCompletion();
90 // The WebThread destructor blocks until all the tasks of the database
91 // thread are processed. However, it shouldn't block at all because
92 // the database thread has already finished processing the cleanup task.
96 bool DatabaseThread::terminationRequested() const
98 MutexLocker lock(m_terminationRequestedMutex);
99 return m_terminationRequested;
102 void DatabaseThread::cleanupDatabaseThread()
104 WTF_LOG(StorageAPI, "Cleaning up DatabaseThread %p", this);
106 // Clean up the list of all pending transactions on this database thread
107 m_transactionCoordinator->shutdown();
109 // 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
110 // inconsistent or locked state.
111 if (m_openDatabaseSet.size() > 0) {
112 // As the call to close will modify the original set, we must take a copy to iterate over.
113 WillBeHeapHashSet<RefPtrWillBeMember<Database> > openSetCopy;
114 openSetCopy.swap(m_openDatabaseSet);
115 WillBeHeapHashSet<RefPtrWillBeMember<Database> >::iterator end = openSetCopy.end();
116 for (WillBeHeapHashSet<RefPtrWillBeMember<Database> >::iterator it = openSetCopy.begin(); it != end; ++it)
120 m_thread->postTask(new Task(WTF::bind(&DatabaseThread::cleanupDatabaseThreadCompleted, this)));
123 void DatabaseThread::cleanupDatabaseThreadCompleted()
125 m_thread->detachGC();
126 if (m_cleanupSync) // Someone wanted to know when we were done cleaning up.
127 m_cleanupSync->taskCompleted();
130 void DatabaseThread::recordDatabaseOpen(Database* database)
132 ASSERT(isDatabaseThread());
134 ASSERT(!m_openDatabaseSet.contains(database));
135 m_openDatabaseSet.add(database);
138 void DatabaseThread::recordDatabaseClosed(Database* database)
140 ASSERT(isDatabaseThread());
142 ASSERT(m_terminationRequested || m_openDatabaseSet.contains(database));
143 m_openDatabaseSet.remove(database);
146 bool DatabaseThread::isDatabaseOpen(Database* database)
148 ASSERT(isDatabaseThread());
150 MutexLocker lock(m_terminationRequestedMutex);
151 return !m_terminationRequested && m_openDatabaseSet.contains(database);
154 void DatabaseThread::scheduleTask(PassOwnPtr<DatabaseTask> task)
157 ASSERT(!terminationRequested());
158 // WebThread takes ownership of the task.
159 m_thread->postTask(task.leakPtr());