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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
59QT_BEGIN_NAMESPACE
60
61class Q_CORE_EXPORT QWindowsPipeReader : public QObject
62{
63 Q_OBJECT
64public:
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
84Q_SIGNALS:
85 void winError(ulong, const QString &);
86 void readyRead();
87 void pipeClosed();
88 void _q_queueReadyRead(QPrivateSignal);
89
90private:
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
120QT_END_NAMESPACE
121
122#endif // QWINDOWSPIPEREADER_P_H
123

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