| 1 | // Copyright (C) 2016 The Qt Company Ltd. |
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| 2 | // SPDX-License-Identifier: LicenseRef-Qt-Commercial OR LGPL-3.0-only OR GPL-2.0-only OR GPL-3.0-only |
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| 3 | |
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| 4 | #ifndef QSHAREDMEMORY_H |
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| 5 | #define QSHAREDMEMORY_H |
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| 6 | |
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| 7 | #include <QtCore/qtipccommon.h> |
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| 8 | #ifndef QT_NO_QOBJECT |
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| 9 | # include <QtCore/qobject.h> |
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| 10 | #else |
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| 11 | # include <QtCore/qobjectdefs.h> |
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| 12 | # include <QtCore/qscopedpointer.h> |
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| 13 | # include <QtCore/qstring.h> |
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| 14 | #endif |
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| 15 | |
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| 16 | QT_BEGIN_NAMESPACE |
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| 17 | |
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| 18 | #if QT_CONFIG(sharedmemory) |
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| 19 | |
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| 20 | class QSharedMemoryPrivate; |
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| 21 | |
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| 22 | class Q_CORE_EXPORT QSharedMemory : public QObject |
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| 23 | { |
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| 24 | Q_OBJECT |
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| 25 | Q_DECLARE_PRIVATE(QSharedMemory) |
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| 26 | |
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| 27 | public: |
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| 28 | enum AccessMode |
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| 29 | { |
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| 30 | ReadOnly, |
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| 31 | ReadWrite |
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| 32 | }; |
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| 33 | Q_ENUM(AccessMode) |
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| 34 | |
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| 35 | enum SharedMemoryError |
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| 36 | { |
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| 37 | NoError, |
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| 38 | PermissionDenied, |
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| 39 | InvalidSize, |
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| 40 | KeyError, |
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| 41 | AlreadyExists, |
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| 42 | NotFound, |
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| 43 | LockError, |
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| 44 | OutOfResources, |
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| 45 | UnknownError |
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| 46 | }; |
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| 47 | Q_ENUM(SharedMemoryError) |
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| 48 | |
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| 49 | QSharedMemory(QObject *parent = nullptr); |
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| 50 | QSharedMemory(const QNativeIpcKey &key, QObject *parent = nullptr); |
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| 51 | ~QSharedMemory(); |
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| 52 | |
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| 53 | QSharedMemory(const QString &key, QObject *parent = nullptr); |
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| 54 | void setKey(const QString &key); |
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| 55 | QString key() const; |
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| 56 | |
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| 57 | void setNativeKey(const QNativeIpcKey &key); |
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| 58 | void setNativeKey(const QString &key, QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs()) |
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| 59 | { setNativeKey({ key, type }); } |
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| 60 | QString nativeKey() const; |
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| 61 | QNativeIpcKey nativeIpcKey() const; |
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| 62 | #if QT_CORE_REMOVED_SINCE(6, 5) |
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| 63 | void setNativeKey(const QString &key); |
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| 64 | #endif |
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| 65 | |
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| 66 | bool create(qsizetype size, AccessMode mode = ReadWrite); |
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| 67 | qsizetype size() const; |
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| 68 | |
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| 69 | bool attach(AccessMode mode = ReadWrite); |
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| 70 | bool isAttached() const; |
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| 71 | bool detach(); |
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| 72 | |
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| 73 | void *data(); |
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| 74 | const void* constData() const; |
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| 75 | const void *data() const; |
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| 76 | |
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| 77 | #if QT_CONFIG(systemsemaphore) |
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| 78 | bool lock(); |
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| 79 | bool unlock(); |
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| 80 | #endif |
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| 81 | |
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| 82 | SharedMemoryError error() const; |
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| 83 | QString errorString() const; |
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| 84 | |
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| 85 | static bool isKeyTypeSupported(QNativeIpcKey::Type type) Q_DECL_CONST_FUNCTION; |
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| 86 | static QNativeIpcKey platformSafeKey(const QString &key, |
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| 87 | QNativeIpcKey::Type type = QNativeIpcKey::DefaultTypeForOs); |
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| 88 | static QNativeIpcKey legacyNativeKey(const QString &key, |
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| 89 | QNativeIpcKey::Type type = QNativeIpcKey::legacyDefaultTypeForOs()); |
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| 90 | |
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| 91 | private: |
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| 92 | Q_DISABLE_COPY(QSharedMemory) |
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| 93 | }; |
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| 94 | |
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| 95 | #endif // QT_CONFIG(sharedmemory) |
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| 96 | |
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| 97 | QT_END_NAMESPACE |
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| 98 | |
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| 99 | #endif // QSHAREDMEMORY_H |
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| 100 | |
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