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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 
64 QT_BEGIN_NAMESPACE
65 
66 class QSystemSemaphorePrivate
67 {
68 
69 public:
70     QSystemSemaphorePrivate();
71 
makeKeyFileName()72     QString makeKeyFileName()
73     {
74         return QSharedMemoryPrivate::makePlatformSafeKey(key, QLatin1String("qipc_systemsem_"));
75     }
76 
setError(QSystemSemaphore::SystemSemaphoreError e,const QString & message)77     inline void setError(QSystemSemaphore::SystemSemaphoreError e, const QString &message)
78     { error = e; errorString = message; }
clearError()79     inline void clearError()
80     { setError(QSystemSemaphore::NoError, 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 
114 QT_END_NAMESPACE
115 
116 #endif // QT_NO_SYSTEMSEMAPHORE
117 
118 #endif // QSYSTEMSEMAPHORE_P_H
119 
120