From 3288b87e2f75278c7415fbc7c4574bcf7da71295 Mon Sep 17 00:00:00 2001
From: Lars Knoll <lars.knoll@digia.com>
Date: Thu, 8 Aug 2013 09:20:52 +0200
Subject: Restructure source code

Move the v4 engine classes from a subdir of qml/qml into
two subdirs (compiler and jsruntime) of the qml module
Remove an unsued qv4syntaxchecker class, and move
the moth code directly into compiler.

Change-Id: I6929bede1f25098e6cb2e68087e779fac16b0c68
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
---
 src/qml/jsruntime/qv4executableallocator_p.h | 134 +++++++++++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/qml/jsruntime/qv4executableallocator_p.h

(limited to 'src/qml/jsruntime/qv4executableallocator_p.h')

diff --git a/src/qml/jsruntime/qv4executableallocator_p.h b/src/qml/jsruntime/qv4executableallocator_p.h
new file mode 100644
index 0000000000..2a304baf9c
--- /dev/null
+++ b/src/qml/jsruntime/qv4executableallocator_p.h
@@ -0,0 +1,134 @@
+/****************************************************************************
+**
+** Copyright (C) 2013 Digia Plc and/or its subsidiary(-ies).
+** Contact: http://www.qt-project.org/legal
+**
+** This file is part of the QtQml module of the Qt Toolkit.
+**
+** $QT_BEGIN_LICENSE:LGPL$
+** Commercial License Usage
+** Licensees holding valid commercial Qt licenses may use this file in
+** accordance with the commercial license agreement provided with the
+** Software or, alternatively, in accordance with the terms contained in
+** a written agreement between you and Digia.  For licensing terms and
+** conditions see http://qt.digia.com/licensing.  For further information
+** use the contact form at http://qt.digia.com/contact-us.
+**
+** GNU Lesser General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU Lesser
+** General Public License version 2.1 as published by the Free Software
+** Foundation and appearing in the file LICENSE.LGPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU Lesser General Public License version 2.1 requirements
+** will be met: http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html.
+**
+** In addition, as a special exception, Digia gives you certain additional
+** rights.  These rights are described in the Digia Qt LGPL Exception
+** version 1.1, included in the file LGPL_EXCEPTION.txt in this package.
+**
+** GNU General Public License Usage
+** Alternatively, this file may be used under the terms of the GNU
+** General Public License version 3.0 as published by the Free Software
+** Foundation and appearing in the file LICENSE.GPL included in the
+** packaging of this file.  Please review the following information to
+** ensure the GNU General Public License version 3.0 requirements will be
+** met: http://www.gnu.org/copyleft/gpl.html.
+**
+**
+** $QT_END_LICENSE$
+**
+****************************************************************************/
+
+#ifndef QV4EXECUTABLEALLOCATOR_H
+#define QV4EXECUTABLEALLOCATOR_H
+
+#include "qv4global_p.h"
+
+#include <QMultiMap>
+#include <QHash>
+#include <QVector>
+#include <QByteArray>
+
+namespace WTF {
+class PageAllocation;
+};
+
+QT_BEGIN_NAMESPACE
+
+namespace QV4 {
+
+class Q_AUTOTEST_EXPORT ExecutableAllocator
+{
+public:
+    struct ChunkOfPages;
+    struct Allocation;
+
+    ~ExecutableAllocator();
+
+    Allocation *allocate(size_t size);
+    void free(Allocation *allocation);
+
+    struct Allocation
+    {
+        Allocation()
+            : addr(0)
+            , size(0)
+            , free(true)
+            , next(0)
+            , prev(0)
+        {}
+
+        void *start() const;
+
+    private:
+        friend class ExecutableAllocator;
+
+        Allocation *split(size_t dividingSize);
+        bool mergeNext(ExecutableAllocator *allocator);
+        bool mergePrevious(ExecutableAllocator *allocator);
+
+        quintptr addr;
+        uint size : 31; // More than 2GB of function code? nah :)
+        uint free : 1;
+        Allocation *next;
+        Allocation *prev;
+    };
+
+    // for debugging / unit-testing
+    int freeAllocationCount() const { return freeAllocations.count(); }
+    int chunkCount() const { return chunks.count(); }
+
+    // Used to store CIE+FDE on x86/x86-64.
+    struct PlatformUnwindInfo
+    {
+        virtual ~PlatformUnwindInfo() {}
+    };
+
+    struct ChunkOfPages
+    {
+        ChunkOfPages()
+            : pages(0)
+            , firstAllocation(0)
+            , unwindInfo(0)
+        {}
+        ~ChunkOfPages();
+
+        WTF::PageAllocation *pages;
+        Allocation *firstAllocation;
+        PlatformUnwindInfo *unwindInfo;
+
+        bool contains(Allocation *alloc) const;
+    };
+
+    ChunkOfPages *chunkForAllocation(Allocation *allocation) const;
+
+private:
+    QMultiMap<size_t, Allocation*> freeAllocations;
+    QMap<quintptr, ChunkOfPages*> chunks;
+};
+
+}
+
+QT_END_NAMESPACE
+
+#endif // QV4EXECUTABLEALLOCATOR_H
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