1 files changed, 115 insertions, 0 deletions
diff --git a/WebCore/bindings/js/WorkerScriptController.cpp b/WebCore/bindings/js/WorkerScriptController.cpp
new file mode 100644
index 0000000..0727510
--- /dev/null
+++ b/WebCore/bindings/js/WorkerScriptController.cpp
@@ -0,0 +1,115 @@
+/*
+ * Copyright (C) 2008 Apple Inc. All Rights Reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY APPLE COMPUTER, INC. ``AS IS'' AND ANY
+ * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
+ * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL APPLE COMPUTER, INC. OR
+ * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
+ * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
+ * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
+ * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY
+ * OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 
+ *
+ */
+
+#include "config.h"
+
+#if ENABLE(WORKERS)
+
+#include "WorkerScriptController.h"
+
+#include "JSDOMBinding.h"
+#include "JSWorkerContext.h"
+#include "ScriptSourceCode.h"
+#include "ScriptValue.h"
+#include "WorkerContext.h"
+#include "WorkerMessagingProxy.h"
+#include "WorkerThread.h"
+#include <interpreter/Interpreter.h>
+#include <runtime/Completion.h>
+#include <runtime/Completion.h>
+#include <runtime/JSLock.h>
+
+using namespace JSC;
+
+namespace WebCore {
+
+WorkerScriptController::WorkerScriptController(WorkerContext* workerContext)
+    : m_globalData(JSGlobalData::create())
+    , m_workerContext(workerContext)
+    , m_executionForbidden(false)
+{
+}
+
+WorkerScriptController::~WorkerScriptController()
+{
+    m_workerContextWrapper = 0; // Unprotect the global object.
+
+    ASSERT(!m_globalData->heap.protectedObjectCount());
+    ASSERT(!m_globalData->heap.isBusy());
+    m_globalData->heap.destroy();
+}
+
+void WorkerScriptController::initScript()
+{
+    ASSERT(!m_workerContextWrapper);
+
+    JSLock lock(false);
+
+    RefPtr<Structure> prototypeStructure = JSWorkerContextPrototype::createStructure(jsNull());
+    RefPtr<Structure> structure = JSWorkerContext::createStructure(new (m_globalData.get()) JSWorkerContextPrototype(prototypeStructure.release()));
+    m_workerContextWrapper = new (m_globalData.get()) JSWorkerContext(structure.release(), m_workerContext);
+}
+
+ScriptValue WorkerScriptController::evaluate(const ScriptSourceCode& sourceCode)
+{
+    {
+        MutexLocker lock(m_sharedDataMutex);
+        if (m_executionForbidden)
+            return noValue();
+    }
+
+    initScriptIfNeeded();
+    JSLock lock(false);
+
+    ExecState* exec = m_workerContextWrapper->globalExec();
+    m_workerContextWrapper->startTimeoutCheck();
+    Completion comp = JSC::evaluate(exec, exec->dynamicGlobalObject()->globalScopeChain(), sourceCode.jsSourceCode(), m_workerContextWrapper);
+    m_workerContextWrapper->stopTimeoutCheck();
+
+    m_workerContext->thread()->messagingProxy()->reportWorkerThreadActivity(m_workerContext->hasPendingActivity());
+
+    if (comp.complType() == Normal || comp.complType() == ReturnValue)
+        return comp.value();
+
+    if (comp.complType() == Throw)
+        reportException(exec, comp.value());
+    return noValue();
+}
+
+void WorkerScriptController::forbidExecution()
+{
+    // This function is called from another thread.
+    // Mutex protection for m_executionForbidden is needed to guarantee that the value is synchronized between processors, because
+    // if it were not, the worker could re-enter JSC::evaluate(), but with timeout already reset.
+    // It is not critical for Interpreter::m_timeoutTime to be synchronized, we just rely on it reaching the worker thread's processor sooner or later.
+    MutexLocker lock(m_sharedDataMutex);
+    m_executionForbidden = true;
+    m_globalData->interpreter->setTimeoutTime(1); // 1 ms is the smallest timeout that can be set.
+}
+
+} // namespace WebCore
+
+#endif // ENABLE(WORKERS)