/IOSelect.h

 1#ifndef __OSELECT_H
 2#define __OSELECT_H
 3
 4#include <sys/select.h>
 5#include <sys/time.h>
 6#include <algorithm>
 7#include <sstream>
 8#include <list>
 9using namespace std;
10
11#define OSELECT_MAX_FDS	10
12
13class IOSelect {
14
15	private:
16		fd_set				set;
17		list<int>			fds;
18		int					max_fd;
19	
20	public:
21		IOSelect(const int fds[]);
22		IOSelect();
23
24		list<int> can_read(const struct timeval *timeout);
25		list<int> can_read(const int seconds);
26		list<int> can_write(const struct timeval *timeout);
27		list<int> can_write(const int seconds);
28		void add(const int &fd);
29		void remove(const int &fd);
30		size_t count(void);
31};
32
33class IOSelectTimeout {
34
35	private:
36		string			msg;
37		struct timeval	*timeout;
38
39	public:
40
41	IOSelectTimeout(const struct timeval *timeout) {
42		stringstream ss;
43
44		this->timeout = (struct timeval *) timeout;
45
46		ss << timeout->tv_sec;
47		ss << "." << timeout->tv_usec;
48		ss << " seconds without I/O" << endl;
49		msg = ss.str();
50	}
51
52	const char *what() const throw() {
53		return msg.c_str();
54	}
55};
56
57
58
59#endif