qsystemsemaphore_systemv.cpp

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17key_t QSystemSemaphorePrivate::handle(QSystemSemaphore::AccessMode mode)-
18{-
19 if (key.isEmpty()){-
20 errorString = QCoreApplication::tr("%1: key is empty", "QSystemSemaphore").arg(QLatin1String("QSystemSemaphore::handle:"));-
21 error = QSystemSemaphore::KeyError;-
22 return -1;-
23 }-
24-
25-
26 if (-1 != unix_key)-
27 return unix_key;-
28-
29-
30 int built = QSharedMemoryPrivate::createUnixKeyFile(fileName);-
31 if (-1 == built) {-
32 errorString = QCoreApplication::tr("%1: unable to make key", "QSystemSemaphore").arg(QLatin1String("QSystemSemaphore::handle:"));-
33 error = QSystemSemaphore::KeyError;-
34 return -1;-
35 }-
36 createdFile = (1 == built);-
37-
38-
39 unix_key = qt_safe_ftok(QFile::encodeName(fileName), 'Q');-
40 if (-1 == unix_key) {-
41 errorString = QCoreApplication::tr("%1: ftok failed", "QSystemSemaphore").arg(QLatin1String("QSystemSemaphore::handle:"));-
42 error = QSystemSemaphore::KeyError;-
43 return -1;-
44 }-
45-
46-
47 semaphore = semget(unix_key, 1, 0600 | 01000 | 02000);-
48 if (-1 == semaphore) {-
49 if ((*__errno_location ()) == 17)-
50 semaphore = semget(unix_key, 1, 0600 | 01000);-
51 if (-1 == semaphore) {-
52 setErrorString(QLatin1String("QSystemSemaphore::handle"));-
53 cleanHandle();-
54 return -1;-
55 }-
56 } else {-
57 createdSemaphore = true;-
58-
59 createdFile = true;-
60 }-
61-
62 if (mode == QSystemSemaphore::Create) {-
63 createdSemaphore = true;-
64 createdFile = true;-
65 }-
66-
67-
68 if (createdSemaphore && initialValue >= 0) {-
69 qt_semun init_op;-
70 init_op.val = initialValue;-
71 if (-1 == semctl(semaphore, 0, 16, init_op)) {-
72 setErrorString(QLatin1String("QSystemSemaphore::handle"));-
73 cleanHandle();-
74 return -1;-
75 }-
76 }-
77-
78 return unix_key;-
79}-
80-
81-
82-
83-
84-
85-
86void QSystemSemaphorePrivate::cleanHandle()-
87{-
88 unix_key = -1;-
89-
90-
91 if (createdFile
createdFileDescription
TRUEevaluated 3522 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
FALSEevaluated 3937 times by 5 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
  • tst_qapplication - unknown status
  • tst_qsharedmemory - unknown status
  • tst_qsystemsemaphore - unknown status
) {		3522-3937
92 QFile::remove(fileName);-
93 createdFile = false;-
94 }
executed 3522 times by 2 tests: end of block
Executed by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
3522
95-
96 if (createdSemaphore
createdSemaphoreDescription
TRUEevaluated 3520 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
FALSEevaluated 3939 times by 5 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
  • tst_qapplication - unknown status
  • tst_qsharedmemory - unknown status
  • tst_qsystemsemaphore - unknown status
) {		3520-3939
97 if (-
-1 != semaphoreDescription
TRUEevaluated 3519 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
FALSEevaluated 1 time by 1 test
Evaluated by:
  • tst_QSharedMemory
1 != semaphore
-1 != semaphoreDescription
TRUEevaluated 3519 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
FALSEevaluated 1 time by 1 test
Evaluated by:
  • tst_QSharedMemory
) {		1-3519
98 if (-
-1 == semctl(s...hore, 0, 0, 0)Description
TRUEnever evaluated
FALSEevaluated 3519 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
1 == semctl(semaphore, 0, 0, 0)
-1 == semctl(s...hore, 0, 0, 0)Description
TRUEnever evaluated
FALSEevaluated 3519 times by 2 tests
Evaluated by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
) {		0-3519
99 setErrorString(QLatin1String("QSystemSemaphore::cleanHandle"));-
100-
101-
102-
103 }
never executed: end of block
0
104 semaphore = -1;-
105 }
executed 3519 times by 2 tests: end of block
Executed by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
3519
106 createdSemaphore = false;-
107 }
executed 3520 times by 2 tests: end of block
Executed by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
3520
108}
executed 7459 times by 5 tests: end of block
Executed by:
  • tst_QSharedMemory
  • tst_QSystemSemaphore
  • tst_qapplication - unknown status
  • tst_qsharedmemory - unknown status
  • tst_qsystemsemaphore - unknown status
7459
109-
110-
111-
112-
113bool QSystemSemaphorePrivate::modifySemaphore(int count)-
114{-
115 if (-1 == handle())-
116 return false;-
117-
118 struct sembuf operation;-
119 operation.sem_num = 0;-
120 operation.sem_op = count;-
121 operation.sem_flg = 0x1000;-
122-
123 int res;-
124 do { res = semop(semaphore, &operation, 1); } while (res == -1 && (*__errno_location ()) == 4);-
125 if (-1 == res) {-
126-
127 if ((*__errno_location ()) == 22 || (*__errno_location ()) == 43) {-
128 semaphore = -1;-
129 cleanHandle();-
130 handle();-
131 return modifySemaphore(count);-
132 }-
133 setErrorString(QLatin1String("QSystemSemaphore::modifySemaphore"));-
134-
135-
136-
137 return false;-
138 }-
139-
140 clearError();-
141 return true;-
142}-
143-
144-
145-
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