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39 | |
40 | #ifndef QWINDOWSPIPEREADER_P_H |
41 | #define QWINDOWSPIPEREADER_P_H |
42 | |
43 | // |
44 | // W A R N I N G |
45 | // ------------- |
46 | // |
47 | // This file is not part of the Qt API. It exists purely as an |
48 | // implementation detail. This header file may change from version to |
49 | // version without notice, or even be removed. |
50 | // |
51 | // We mean it. |
52 | // |
53 | |
54 | #include <qobject.h> |
55 | #include <private/qringbuffer_p.h> |
56 | |
57 | #include <qt_windows.h> |
58 | |
59 | QT_BEGIN_NAMESPACE |
60 | |
61 | class Q_CORE_EXPORT QWindowsPipeReader : public QObject |
62 | { |
63 | Q_OBJECT |
64 | public: |
65 | explicit QWindowsPipeReader(QObject *parent = 0); |
66 | ~QWindowsPipeReader(); |
67 | |
68 | void setHandle(HANDLE hPipeReadEnd); |
69 | void startAsyncRead(); |
70 | void stop(); |
71 | |
72 | void setMaxReadBufferSize(qint64 size) { readBufferMaxSize = size; } |
73 | qint64 maxReadBufferSize() const { return readBufferMaxSize; } |
74 | |
75 | bool isPipeClosed() const { return pipeBroken; } |
76 | qint64 bytesAvailable() const; |
77 | qint64 read(char *data, qint64 maxlen); |
78 | bool canReadLine() const; |
79 | bool waitForReadyRead(int msecs); |
80 | bool waitForPipeClosed(int msecs); |
81 | |
82 | bool isReadOperationActive() const { return readSequenceStarted; } |
83 | |
84 | Q_SIGNALS: |
85 | void winError(ulong, const QString &); |
86 | void readyRead(); |
87 | void pipeClosed(); |
88 | void _q_queueReadyRead(QPrivateSignal); |
89 | |
90 | private: |
91 | static void CALLBACK readFileCompleted(DWORD errorCode, DWORD numberOfBytesTransfered, |
92 | OVERLAPPED *overlappedBase); |
93 | void notified(DWORD errorCode, DWORD numberOfBytesRead); |
94 | DWORD checkPipeState(); |
95 | bool waitForNotification(int timeout); |
96 | void emitPendingReadyRead(); |
97 | |
98 | class Overlapped : public OVERLAPPED |
99 | { |
100 | Q_DISABLE_COPY_MOVE(Overlapped) |
101 | public: |
102 | explicit Overlapped(QWindowsPipeReader *reader); |
103 | void clear(); |
104 | QWindowsPipeReader *pipeReader; |
105 | }; |
106 | |
107 | HANDLE handle; |
108 | Overlapped *overlapped; |
109 | qint64 readBufferMaxSize; |
110 | QRingBuffer readBuffer; |
111 | qint64 actualReadBufferSize; |
112 | bool stopped; |
113 | bool readSequenceStarted; |
114 | bool notifiedCalled; |
115 | bool pipeBroken; |
116 | bool readyReadPending; |
117 | bool inReadyRead; |
118 | }; |
119 | |
120 | QT_END_NAMESPACE |
121 | |
122 | #endif // QWINDOWSPIPEREADER_P_H |
123 |
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