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870a0fe4 AT |
1 | #ifdef HAVE_CONFIG_H |
2 | #include "config.h" | |
3 | #endif | |
cfa2996a BH |
4 | #include "mplexer.hh" |
5 | #include "sstuff.hh" | |
6 | #include <iostream> | |
7 | #include <poll.h> | |
8 | #include "misc.hh" | |
10f4eea8 | 9 | #include "namespaces.hh" |
cfa2996a | 10 | |
926444e2 | 11 | class PollFDMultiplexer : public FDMultiplexer |
12 | { | |
13 | public: | |
14 | PollFDMultiplexer() | |
15 | {} | |
16 | virtual ~PollFDMultiplexer() | |
17 | { | |
18 | } | |
19 | ||
20 | virtual int run(struct timeval* tv, int timeout=500); | |
21 | ||
22 | virtual void addFD(callbackmap_t& cbmap, int fd, callbackfunc_t toDo, const funcparam_t& parameter); | |
23 | virtual void removeFD(callbackmap_t& cbmap, int fd); | |
24 | string getName() | |
25 | { | |
26 | return "poll"; | |
27 | } | |
28 | private: | |
29 | }; | |
cfa2996a BH |
30 | |
31 | static FDMultiplexer* make() | |
32 | { | |
33 | return new PollFDMultiplexer(); | |
34 | } | |
35 | ||
36 | static struct RegisterOurselves | |
37 | { | |
38 | RegisterOurselves() { | |
39 | FDMultiplexer::getMultiplexerMap().insert(make_pair(1, &make)); | |
40 | } | |
41 | } doIt; | |
42 | ||
43 | void PollFDMultiplexer::addFD(callbackmap_t& cbmap, int fd, callbackfunc_t toDo, const boost::any& parameter) | |
44 | { | |
45 | Callback cb; | |
46 | cb.d_callback=toDo; | |
47 | cb.d_parameter=parameter; | |
48 | memset(&cb.d_ttd, 0, sizeof(cb.d_ttd)); | |
49 | if(cbmap.count(fd)) | |
335da0ba | 50 | throw FDMultiplexerException("Tried to add fd "+std::to_string(fd)+ " to multiplexer twice"); |
cfa2996a BH |
51 | cbmap[fd]=cb; |
52 | } | |
53 | ||
54 | void PollFDMultiplexer::removeFD(callbackmap_t& cbmap, int fd) | |
55 | { | |
56 | if(d_inrun && d_iter->first==fd) // trying to remove us! | |
57 | d_iter++; | |
58 | ||
59 | if(!cbmap.erase(fd)) | |
335da0ba | 60 | throw FDMultiplexerException("Tried to remove unlisted fd "+std::to_string(fd)+ " from multiplexer"); |
cfa2996a BH |
61 | } |
62 | ||
63 | bool pollfdcomp(const struct pollfd& a, const struct pollfd& b) | |
64 | { | |
65 | return a.fd < b.fd; | |
66 | } | |
67 | ||
926444e2 | 68 | int PollFDMultiplexer::run(struct timeval* now, int timeout) |
cfa2996a BH |
69 | { |
70 | if(d_inrun) { | |
71 | throw FDMultiplexerException("FDMultiplexer::run() is not reentrant!\n"); | |
72 | } | |
73 | ||
74 | vector<struct pollfd> pollfds; | |
75 | ||
76 | struct pollfd pollfd; | |
77 | for(callbackmap_t::const_iterator i=d_readCallbacks.begin(); i != d_readCallbacks.end(); ++i) { | |
78 | pollfd.fd = i->first; | |
79 | pollfd.events = POLLIN; | |
80 | pollfds.push_back(pollfd); | |
81 | } | |
82 | ||
83 | for(callbackmap_t::const_iterator i=d_writeCallbacks.begin(); i != d_writeCallbacks.end(); ++i) { | |
84 | pollfd.fd = i->first; | |
85 | pollfd.events = POLLOUT; | |
86 | pollfds.push_back(pollfd); | |
87 | } | |
88 | ||
0e663c3b RG |
89 | int ret=poll(&pollfds[0], pollfds.size(), timeout); |
90 | gettimeofday(now, 0); // MANDATORY! | |
cfa2996a BH |
91 | |
92 | if(ret < 0 && errno!=EINTR) | |
93 | throw FDMultiplexerException("poll returned error: "+stringerror()); | |
94 | ||
95 | d_iter=d_readCallbacks.end(); | |
96 | d_inrun=true; | |
0e663c3b | 97 | |
cfa2996a BH |
98 | for(unsigned int n = 0; n < pollfds.size(); ++n) { |
99 | if(pollfds[n].revents == POLLIN) { | |
100 | d_iter=d_readCallbacks.find(pollfds[n].fd); | |
101 | ||
102 | if(d_iter != d_readCallbacks.end()) { | |
103 | d_iter->second.d_callback(d_iter->first, d_iter->second.d_parameter); | |
104 | continue; // so we don't refind ourselves as writable! | |
105 | } | |
106 | } | |
107 | else if(pollfds[n].revents == POLLOUT) { | |
108 | d_iter=d_writeCallbacks.find(pollfds[n].fd); | |
109 | ||
110 | if(d_iter != d_writeCallbacks.end()) { | |
111 | d_iter->second.d_callback(d_iter->first, d_iter->second.d_parameter); | |
112 | } | |
113 | } | |
114 | } | |
115 | d_inrun=false; | |
0e663c3b | 116 | return ret; |
cfa2996a BH |
117 | } |
118 | ||
119 | #if 0 | |
120 | ||
121 | void acceptData(int fd, boost::any& parameter) | |
122 | { | |
123 | cout<<"Have data on fd "<<fd<<endl; | |
124 | Socket* sock=boost::any_cast<Socket*>(parameter); | |
125 | string packet; | |
126 | IPEndpoint rem; | |
127 | sock->recvFrom(packet, rem); | |
128 | cout<<"Received "<<packet.size()<<" bytes!\n"; | |
129 | } | |
130 | ||
131 | ||
132 | int main() | |
133 | { | |
a5794017 | 134 | Socket s(AF_INET, SOCK_DGRAM); |
cfa2996a BH |
135 | |
136 | IPEndpoint loc("0.0.0.0", 2000); | |
137 | s.bind(loc); | |
138 | ||
139 | PollFDMultiplexer sfm; | |
140 | ||
141 | sfm.addReadFD(s.getHandle(), &acceptData, &s); | |
142 | ||
143 | for(int n=0; n < 100 ; ++n) { | |
144 | sfm.run(); | |
145 | } | |
146 | sfm.removeReadFD(s.getHandle()); | |
147 | sfm.removeReadFD(s.getHandle()); | |
148 | } | |
149 | #endif | |
150 |