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a/src/sysvshm.cpp |
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b/src/sysvshm.cpp |
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... |
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... |
| 54 |
size_t bytes{0};
|
54 |
size_t bytes{0};
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| 55 |
// Delete seg or leave it behind.
|
55 |
// Delete seg or leave it behind.
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| 56 |
bool removeondelete{true};
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56 |
bool removeondelete{true};
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| 57 |
bool ok{false};
|
57 |
bool ok{false};
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| 58 |
bool mycreation{false};
|
58 |
bool mycreation{false};
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|
|
59 |
int lasterrno;
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| 59 |
};
|
60 |
};
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| 60 |
|
61 |
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| 61 |
void ShmSeg::setremove(bool onoff)
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62 |
void ShmSeg::setremove(bool onoff)
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| 62 |
{
|
63 |
{
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| 63 |
m->removeondelete = onoff;
|
64 |
m->removeondelete = onoff;
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|
... |
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... |
| 74 |
}
|
75 |
}
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| 75 |
|
76 |
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| 76 |
bool ShmSeg::ok()
|
77 |
bool ShmSeg::ok()
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| 77 |
{
|
78 |
{
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| 78 |
return m->ok;
|
79 |
return m->ok;
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|
80 |
}
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|
81 |
int ShmSeg::geterrno()
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|
82 |
{
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|
83 |
return m->lasterrno;
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| 79 |
}
|
84 |
}
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| 80 |
|
85 |
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| 81 |
ShmSeg::ShmSeg(key_t ky, size_t size, bool create, int perms)
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86 |
ShmSeg::ShmSeg(key_t ky, size_t size, bool create, int perms)
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| 82 |
: m(new Internal)
|
87 |
: m(new Internal)
|
| 83 |
{
|
88 |
{
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... |
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... |
| 94 |
if (create) {
|
99 |
if (create) {
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| 95 |
flags = IPC_CREAT|IPC_EXCL;
|
100 |
flags = IPC_CREAT|IPC_EXCL;
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| 96 |
} else {
|
101 |
} else {
|
| 97 |
perms = 0;
|
102 |
perms = 0;
|
| 98 |
}
|
103 |
}
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|
|
104 |
m->lasterrno = 0;
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| 99 |
if ((m->shmid = shmget(m->key, size, flags|perms)) >= 0) {
|
105 |
if ((m->shmid = shmget(m->key, size, flags|perms)) >= 0) {
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| 100 |
if (create) {
|
106 |
if (create) {
|
| 101 |
m->mycreation = true;
|
107 |
m->mycreation = true;
|
| 102 |
}
|
108 |
}
|
| 103 |
} else {
|
109 |
} else {
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|
|
110 |
m->lasterrno = errno;
|
| 104 |
if (errno != EEXIST) {
|
111 |
if (errno != EEXIST) {
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|
|
112 |
// Don't log a possibly trivial error, let the caller do it if
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|
|
113 |
// needed.
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|
|
114 |
// LOGSYSERR("ShmSeg::ShmSeg", "shmget", size);
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|
|
115 |
return;
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|
|
116 |
}
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|
|
117 |
// If the segment already existed, let's attach it
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|
|
118 |
m->lasterrno = 0;
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|
|
119 |
if ((m->shmid = shmget(m->key, size, 0)) < 0) {
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|
|
120 |
m->lasterrno = errno;
|
| 105 |
LOGSYSERR("ShmSeg::ShmSeg", "shmget", size);
|
121 |
LOGSYSERR("ShmSeg::ShmSeg", "shmget", size);
|
| 106 |
return;
|
122 |
return;
|
| 107 |
}
|
123 |
}
|
| 108 |
if ((m->shmid = shmget(m->key, size, 0)) < 0) {
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|
|
| 109 |
LOGSYSERR("ShmSeg::ShmSeg", "shmget", size);
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|
|
| 110 |
return;
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|
|
| 111 |
}
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|
|
| 112 |
}
|
124 |
}
|
| 113 |
m->bytes = size;
|
125 |
m->bytes = size;
|
| 114 |
// Attach it
|
126 |
// Attach it
|
|
|
127 |
m->lasterrno = 0;
|
| 115 |
if ((m->seg = shmat(m->shmid, 0, 0)) == (void *)-1) {
|
128 |
if ((m->seg = shmat(m->shmid, 0, 0)) == (void *)-1) {
|
|
|
129 |
m->lasterrno = errno;
|
| 116 |
LOGSYSERR("ShmSeg::ShmSeg", "shmat", m->shmid);
|
130 |
LOGSYSERR("ShmSeg::ShmSeg", "shmat", m->shmid);
|
| 117 |
shmctl(m->shmid, IPC_RMID, 0);
|
131 |
shmctl(m->shmid, IPC_RMID, 0);
|
| 118 |
return;
|
132 |
return;
|
| 119 |
}
|
133 |
}
|
| 120 |
m->ok = true;
|
134 |
m->ok = true;
|
| 121 |
}
|
135 |
}
|
| 122 |
|
136 |
|
| 123 |
ShmSeg::ShmSeg(const char*pathname, int proj_id, size_t size, bool create, int perms)
|
137 |
ShmSeg::ShmSeg(const char*pathname, int proj_id, size_t size, bool create,
|
|
|
138 |
int perms)
|
| 124 |
: ShmSeg(ftok(pathname, proj_id), size, create, perms)
|
139 |
: ShmSeg(ftok(pathname, proj_id), size, create, perms)
|
| 125 |
{
|
140 |
{
|
| 126 |
}
|
141 |
}
|
| 127 |
|
142 |
|
| 128 |
ShmSeg::~ShmSeg()
|
143 |
ShmSeg::~ShmSeg()
|