1 files changed, 178 insertions, 0 deletions
diff --git a/Source/WebKit2/Platform/qt/SharedMemoryQt.cpp b/Source/WebKit2/Platform/qt/SharedMemoryQt.cpp
new file mode 100644
index 0000000..f5fecfc
--- /dev/null
+++ b/Source/WebKit2/Platform/qt/SharedMemoryQt.cpp
@@ -0,0 +1,178 @@
+/*
+ * Copyright (C) 2010 Apple Inc. All rights reserved.
+ * Copyright (c) 2010 University of Szeged
+ * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies)
+ *
+ * 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 INC. AND ITS CONTRIBUTORS ``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 INC. OR ITS 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 "SharedMemory.h"
+
+#include "ArgumentDecoder.h"
+#include "ArgumentEncoder.h"
+#include "CleanupHandler.h"
+#include "WebCoreArgumentCoders.h"
+#include <unistd.h>
+#include <QCoreApplication>
+#include <QLatin1String>
+#include <QSharedMemory>
+#include <QString>
+#include <QUuid>
+#include <wtf/Assertions.h>
+#include <wtf/CurrentTime.h>
+
+namespace WebKit {
+
+SharedMemory::Handle::Handle()
+    : m_key()
+    , m_size(0)
+{
+}
+
+SharedMemory::Handle::~Handle()
+{
+}
+
+bool SharedMemory::Handle::isNull() const
+{
+    return m_key.isNull();
+}
+
+void SharedMemory::Handle::encode(CoreIPC::ArgumentEncoder* encoder) const
+{
+    encoder->encodeUInt64(m_size);
+    encoder->encode(m_key);
+    m_key = String();
+}
+
+bool SharedMemory::Handle::decode(CoreIPC::ArgumentDecoder* decoder, Handle& handle)
+{
+    ASSERT_ARG(handle, !handle.m_size);
+    ASSERT_ARG(handle, handle.m_key.isNull());
+
+    uint64_t size;
+    if (!decoder->decodeUInt64(size))
+        return false;
+
+    String key;
+    if (!decoder->decode(key))
+       return false;
+
+    handle.m_size = size;
+    handle.m_key = key;
+
+    return true;
+}
+
+static QString createUniqueKey()
+{
+    return QLatin1String("QWKSharedMemoryKey") + QUuid::createUuid().toString();
+}
+
+PassRefPtr<SharedMemory> SharedMemory::create(size_t size)
+{
+    RefPtr<SharedMemory> sharedMemory(adoptRef(new SharedMemory));
+    QSharedMemory* impl = new QSharedMemory(createUniqueKey());
+    bool created = impl->create(size);
+    ASSERT_UNUSED(created, created);
+
+    sharedMemory->m_impl = impl;
+    sharedMemory->m_size = size;
+    sharedMemory->m_data = impl->data();
+
+    // Do not leave the shared memory segment behind.
+    CleanupHandler::instance()->markForCleanup(impl);
+
+    return sharedMemory.release();
+}
+
+static inline QSharedMemory::AccessMode accessMode(SharedMemory::Protection protection)
+{
+    switch (protection) {
+    case SharedMemory::ReadOnly:
+        return QSharedMemory::ReadOnly;
+    case SharedMemory::ReadWrite:
+        return QSharedMemory::ReadWrite;
+    }
+
+    ASSERT_NOT_REACHED();
+    return QSharedMemory::ReadWrite;
+}
+
+PassRefPtr<SharedMemory> SharedMemory::create(const Handle& handle, Protection protection)
+{
+    if (handle.isNull())
+        return 0;
+
+    QSharedMemory* impl = new QSharedMemory(QString(handle.m_key));
+    bool attached = impl->attach(accessMode(protection));
+    if (!attached) {
+        delete impl;
+        return 0;
+    }
+
+    RefPtr<SharedMemory> sharedMemory(adoptRef(new SharedMemory));
+    sharedMemory->m_impl = impl;
+    ASSERT(handle.m_size == impl->size());
+    sharedMemory->m_size = handle.m_size;
+    sharedMemory->m_data = impl->data();
+
+    // Do not leave the shared memory segment behind.
+    CleanupHandler::instance()->markForCleanup(impl);
+
+    return sharedMemory.release();
+}
+
+SharedMemory::~SharedMemory()
+{
+    if (CleanupHandler::instance()->hasStartedDeleting())
+        return;
+
+    CleanupHandler::instance()->unmark(m_impl);
+    delete m_impl;
+}
+
+bool SharedMemory::createHandle(Handle& handle, Protection protection)
+{
+    ASSERT_ARG(handle, handle.m_key.isNull());
+    ASSERT_ARG(handle, !handle.m_size);
+
+    QString key = m_impl->key();
+    if (key.isNull())
+        return false;
+    handle.m_key = String(key);
+    handle.m_size = m_size;
+
+    return true;
+}
+
+unsigned SharedMemory::systemPageSize()
+{
+    static unsigned pageSize = 0;
+
+    if (!pageSize)
+        pageSize = getpagesize();
+
+    return pageSize;
+}
+
+} // namespace WebKit