1 files changed, 67 insertions, 0 deletions
diff --git a/src/libs/qmlpuppetcommunication/container/sharedmemory.h b/src/libs/qmlpuppetcommunication/container/sharedmemory.h
new file mode 100644
index 0000000000..1c5da3454a
--- /dev/null
+++ b/src/libs/qmlpuppetcommunication/container/sharedmemory.h
@@ -0,0 +1,67 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR GPL-3.0 WITH Qt-GPL-exception-1.0
+
+#pragma once
+
+#include <QSharedMemory>
+#include <QSystemSemaphore>
+
+namespace QmlDesigner {
+
+class SharedMemory
+{
+    friend class SharedMemoryLocker;
+public:
+    SharedMemory();
+    SharedMemory(const QString &key);
+    ~SharedMemory();
+
+    void setKey(const QString &key);
+    QString key() const;
+
+    bool create(int size, QSharedMemory::AccessMode mode = QSharedMemory::ReadWrite);
+    int size() const;
+
+    bool attach(QSharedMemory::AccessMode mode = QSharedMemory::ReadWrite);
+    bool isAttached() const;
+    bool detach();
+
+    void *data();
+    const void* constData() const;
+    const void *data() const;
+
+    bool lock();
+    bool unlock();
+
+    QSharedMemory::SharedMemoryError error() const;
+    QString errorString() const;
+
+protected:
+#ifdef Q_OS_UNIX
+    bool initKeyInternal();
+    void cleanHandleInternal();
+    bool createInternal(QSharedMemory::AccessMode mode, size_t size);
+    bool attachInternal(QSharedMemory::AccessMode mode);
+    bool detachInternal();
+    int handle();
+
+    void setErrorString(const QString &function);
+#endif
+private:
+#ifndef Q_OS_UNIX
+    QSharedMemory m_sharedMemory;
+#else
+    void *m_memory;
+    size_t m_size;
+    QString m_key;
+    QByteArray m_nativeKey;
+    QSharedMemory::SharedMemoryError m_error;
+    QString m_errorString;
+    QSystemSemaphore m_systemSemaphore;
+    bool m_lockedByMe;
+    int m_fileHandle;
+    bool m_createdByMe;
+#endif
+};
+
+} // namespace QmlDesigner