1 files changed, 99 insertions, 0 deletions
diff --git a/src/corelib/ipc/qsharedmemory.h b/src/corelib/ipc/qsharedmemory.h
new file mode 100644
index 0000000000..ab448b15c1
--- /dev/null
+++ b/src/corelib/ipc/qsharedmemory.h
@@ -0,0 +1,99 @@
+// Copyright (C) 2016 The Qt Company Ltd.
+// SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only
+
+#ifndef QSHAREDMEMORY_H
+#define QSHAREDMEMORY_H
+
+#include <QtCore/qtipccommon.h>
+#ifndef QT_NO_QOBJECT
+# include <QtCore/qobject.h>
+#else
+# include <QtCore/qobjectdefs.h>
+# include <QtCore/qscopedpointer.h>
+# include <QtCore/qstring.h>
+#endif
+
+QT_BEGIN_NAMESPACE
+
+#if QT_CONFIG(sharedmemory)
+
+class QSharedMemoryPrivate;
+
+class Q_CORE_EXPORT QSharedMemory : public QObject
+{
+    Q_OBJECT
+    Q_DECLARE_PRIVATE(QSharedMemory)
+
+public:
+    enum AccessMode
+    {
+        ReadOnly,
+        ReadWrite
+    };
+    Q_ENUM(AccessMode)
+
+    enum SharedMemoryError
+    {
+        NoError,
+        PermissionDenied,
+        InvalidSize,
+        KeyError,
+        AlreadyExists,
+        NotFound,
+        LockError,
+        OutOfResources,
+        UnknownError
+    };
+    Q_ENUM(SharedMemoryError)
+
+    QSharedMemory(QObject *parent = nullptr);
+    QSharedMemory(const QNativeIpcKey &key, QObject *parent = nullptr);
+    ~QSharedMemory();
+
+    QSharedMemory(const QString &key, QObject *parent = nullptr);
+    void setKey(const QString &key);
+    QString key() const;
+
+    void setNativeKey(const QNativeIpcKey &key);
+    void setNativeKey(const QString &key, QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs())
+    { setNativeKey({ key, type }); }
+    QString nativeKey() const;
+    QNativeIpcKey nativeIpcKey() const;
+#if QT_CORE_REMOVED_SINCE(6, 5)
+    void setNativeKey(const QString &key);
+#endif
+
+    bool create(qsizetype size, AccessMode mode = ReadWrite);
+    qsizetype size() const;
+
+    bool attach(AccessMode mode = ReadWrite);
+    bool isAttached() const;
+    bool detach();
+
+    void *data();
+    const void* constData() const;
+    const void *data() const;
+
+#if QT_CONFIG(systemsemaphore)
+    bool lock();
+    bool unlock();
+#endif
+
+    SharedMemoryError error() const;
+    QString errorString() const;
+
+    static bool isKeyTypeSupported(QNativeIpcKey::Type type) Q_DECL_CONST_FUNCTION;
+    static QNativeIpcKey platformSafeKey(const QString &key,
+            QNativeIpcKey::Type type = QNativeIpcKey::DefaultTypeForOs);
+    static QNativeIpcKey legacyNativeKey(const QString &key,
+            QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs());
+
+private:
+    Q_DISABLE_COPY(QSharedMemory)
+};
+
+#endif // QT_CONFIG(sharedmemory)
+
+QT_END_NAMESPACE
+
+#endif // QSHAREDMEMORY_H