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39
40#ifndef QSYSTEMSEMAPHORE_P_H
41#define QSYSTEMSEMAPHORE_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 "qsystemsemaphore.h"
55
56#ifndef QT_NO_SYSTEMSEMAPHORE
57
58#include "qsharedmemory_p.h"
59#include <sys/types.h>
60#ifdef QT_POSIX_IPC
61# include <semaphore.h>
62#endif
63
64QT_BEGIN_NAMESPACE
65
66class QSystemSemaphorePrivate
67{
68
69public:
70 QSystemSemaphorePrivate();
71
72 QString makeKeyFileName()
73 {
74 return QSharedMemoryPrivate::makePlatformSafeKey(key, prefix: QLatin1String("qipc_systemsem_"));
75 }
76
77 inline void setError(QSystemSemaphore::SystemSemaphoreError e, const QString &message)
78 { error = e; errorString = message; }
79 inline void clearError()
80 { setError(e: QSystemSemaphore::NoError, message: QString()); }
81
82#ifdef Q_OS_WIN
83 Qt::HANDLE handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);
84 void setErrorString(const QString &function);
85#elif defined(QT_POSIX_IPC)
86 bool handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);
87 void setErrorString(const QString &function);
88#else
89 key_t handle(QSystemSemaphore::AccessMode mode = QSystemSemaphore::Open);
90 void setErrorString(const QString &function);
91#endif
92 void cleanHandle();
93 bool modifySemaphore(int count);
94
95 QString key;
96 QString fileName;
97 int initialValue;
98#ifdef Q_OS_WIN
99 Qt::HANDLE semaphore;
100 Qt::HANDLE semaphoreLock;
101#elif defined(QT_POSIX_IPC)
102 sem_t *semaphore;
103 bool createdSemaphore;
104#else
105 key_t unix_key;
106 int semaphore;
107 bool createdFile;
108 bool createdSemaphore;
109#endif
110 QString errorString;
111 QSystemSemaphore::SystemSemaphoreError error;
112};
113
114QT_END_NAMESPACE
115
116#endif // QT_NO_SYSTEMSEMAPHORE
117
118#endif // QSYSTEMSEMAPHORE_P_H
119
120

source code of qtbase/src/corelib/kernel/qsystemsemaphore_p.h