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39
40 #include "qplatformdefs.h"
41
42 #include "qsharedmemory.h"
43 #include "qsharedmemory_p.h"
44 #include "qsystemsemaphore.h"
45 #include <qdebug.h>
46
47 #include <errno.h>
48
49 #ifndef QT_NO_SHAREDMEMORY
50 #include <sys/types.h>
51 #ifndef QT_POSIX_IPC
52 #include <sys/ipc.h>
53 #include <sys/shm.h>
54 #else
55 #include <sys/mman.h>
56 #endif
57 #include <sys/stat.h>
58 #include <fcntl.h>
59 #include <unistd.h>
60 #endif //QT_NO_SHAREDMEMORY
61
62 #include "private/qcore_unix_p.h"
63
64 #ifndef QT_NO_SHAREDMEMORY
65 QT_BEGIN_NAMESPACE
66
QSharedMemoryPrivate()67 QSharedMemoryPrivate::QSharedMemoryPrivate() :
68 #ifndef QT_NO_QOBJECT
69 QObjectPrivate(),
70 #endif
71 memory(nullptr), size(0), error(QSharedMemory::NoError),
72 #ifndef QT_NO_SYSTEMSEMAPHORE
73 systemSemaphore(QString()), lockedByMe(false),
74 #endif
75 #ifndef QT_POSIX_IPC
76 unix_key(0)
77 #else
78 hand(-1)
79 #endif
80 {
81 }
82
setErrorString(QLatin1String function)83 void QSharedMemoryPrivate::setErrorString(QLatin1String function)
84 {
85 // EINVAL is handled in functions so they can give better error strings
86 switch (errno) {
87 case EACCES:
88 errorString = QSharedMemory::tr("%1: permission denied").arg(function);
89 error = QSharedMemory::PermissionDenied;
90 break;
91 case EEXIST:
92 errorString = QSharedMemory::tr("%1: already exists").arg(function);
93 error = QSharedMemory::AlreadyExists;
94 break;
95 case ENOENT:
96 errorString = QSharedMemory::tr("%1: doesn't exist").arg(function);
97 error = QSharedMemory::NotFound;
98 break;
99 case EMFILE:
100 case ENOMEM:
101 case ENOSPC:
102 errorString = QSharedMemory::tr("%1: out of resources").arg(function);
103 error = QSharedMemory::OutOfResources;
104 break;
105 default:
106 errorString = QSharedMemory::tr("%1: unknown error %2").arg(function).arg(errno);
107 error = QSharedMemory::UnknownError;
108 #if defined QSHAREDMEMORY_DEBUG
109 qDebug() << errorString << "key" << key << "errno" << errno << EINVAL;
110 #endif
111 }
112 }
113
114 QT_END_NAMESPACE
115
116 #endif // QT_NO_SHAREDMEMORY
117