1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
| #include "cselect.h"
#include <cerrno>
#include <cstring>
CSelect::CSelect()
{
mMaxFd = 0;
FD_ZERO(&mErrorFds);
FD_ZERO(&mWriteFds);
FD_ZERO(&mReadFds);
FD_ZERO(&mReadSelectFds);
FD_ZERO(&mWriteSelectFds);
FD_ZERO(&mErrorSelectFds);
}
CSelect:: ~CSelect()
{
}
void CSelect::zeroFds(int fd_type)
{
if (fd_type & C_FDS_READ)
{
FD_ZERO(&mReadFds);
}
if (fd_type & C_FDS_WRITE)
{
FD_ZERO(&mWriteFds);
}
if (fd_type & C_FDS_ERROR)
{
FD_ZERO(&mErrorFds);
}
}
void CSelect::addFd(int fd_type, int fd)
{
if (fd_type & C_FDS_READ)
{
FD_SET(fd, &mReadFds);
}
if (fd_type & C_FDS_WRITE)
{
FD_SET(fd, &mWriteFds);
}
if (fd_type & C_FDS_ERROR)
{
FD_SET(fd, &mErrorFds);
}
if (fd > mMaxFd)
{
mMaxFd = fd;
}
}
void CSelect::removeFd(int fd_type, int fd)
{
if (fd_type & C_FDS_READ)
{
FD_CLR(fd, &mReadFds);
}
if (fd_type & C_FDS_WRITE)
{
FD_CLR(fd, &mWriteFds);
}
if (fd_type & C_FDS_ERROR)
{
FD_CLR(fd, &mErrorFds);
}
}
bool CSelect::isSetFd(int fd_type, int fd)
{
bool is_set = false;
if (fd_type & C_FDS_READ)
{
is_set = FD_ISSET(fd, &mReadSelectFds);
}
if (fd_type & C_FDS_WRITE)
{
is_set = FD_ISSET(fd, &mWriteSelectFds);
}
if (fd_type & C_FDS_ERROR)
{
is_set = FD_ISSET(fd, &mErrorSelectFds);
}
return is_set;
}
int CSelect::select(int fd_type)
{
fd_set *read_fds = nullptr;
fd_set *write_fds = nullptr;
fd_set *error_fds = nullptr;
if (fd_type & C_FDS_READ)
{
memcpy(&mReadSelectFds, &mReadFds, sizeof(fd_set));
read_fds = &mReadSelectFds;
}
if (fd_type & C_FDS_WRITE)
{
memcpy(&mWriteSelectFds, &mWriteFds, sizeof(fd_set));
write_fds = &mWriteSelectFds;
}
if (fd_type & C_FDS_ERROR)
{
memcpy(&mErrorSelectFds, &mErrorFds, sizeof(fd_set));
error_fds = &mErrorSelectFds;
}
return ::select(mMaxFd + 1, read_fds, write_fds, error_fds, nullptr);
}
|