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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
65QT_BEGIN_NAMESPACE
66
67QSharedMemoryPrivate::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
83void 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
114QT_END_NAMESPACE
115
116#endif // QT_NO_SHAREDMEMORY
117