1 : /* Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
2 : This file is part of the GNU C Library.
3 :
4 : The GNU C Library is free software; you can redistribute it and/or
5 : modify it under the terms of the GNU Lesser General Public
6 : License as published by the Free Software Foundation; either
7 : version 2.1 of the License, or (at your option) any later version.
8 :
9 : The GNU C Library is distributed in the hope that it will be useful,
10 : but WITHOUT ANY WARRANTY; without even the implied warranty of
11 : MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
12 : Lesser General Public License for more details.
13 :
14 : You should have received a copy of the GNU Lesser General Public
15 : License along with the GNU C Library; if not, write to the Free
16 : Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
17 : 02111-1307 USA. */
18 :
19 : #ifndef _SYS_EPOLL_H
20 : #define _SYS_EPOLL_H 1
21 :
22 : #include <stdint.h>
23 : #include <sys/types.h>
24 :
25 :
26 : enum EPOLL_EVENTS
27 : {
28 : EPOLLIN = 0x001,
29 : #define EPOLLIN EPOLLIN
30 : EPOLLPRI = 0x002,
31 : #define EPOLLPRI EPOLLPRI
32 : EPOLLOUT = 0x004,
33 : #define EPOLLOUT EPOLLOUT
34 : EPOLLRDNORM = 0x040,
35 : #define EPOLLRDNORM EPOLLRDNORM
36 : EPOLLRDBAND = 0x080,
37 : #define EPOLLRDBAND EPOLLRDBAND
38 : EPOLLWRNORM = 0x100,
39 : #define EPOLLWRNORM EPOLLWRNORM
40 : EPOLLWRBAND = 0x200,
41 : #define EPOLLWRBAND EPOLLWRBAND
42 : EPOLLMSG = 0x400,
43 : #define EPOLLMSG EPOLLMSG
44 : EPOLLERR = 0x008,
45 : #define EPOLLERR EPOLLERR
46 : EPOLLHUP = 0x010,
47 : #define EPOLLHUP EPOLLHUP
48 : EPOLLONESHOT = (1 << 30),
49 : #define EPOLLONESHOT EPOLLONESHOT
50 : EPOLLET = (1 << 31)
51 : #define EPOLLET EPOLLET
52 : };
53 :
54 :
55 : /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */
56 : #define EPOLL_CTL_ADD 1 /* Add a file decriptor to the interface. */
57 : #define EPOLL_CTL_DEL 2 /* Remove a file decriptor from the interface. */
58 : #define EPOLL_CTL_MOD 3 /* Change file decriptor epoll_event structure. */
59 :
60 :
61 : typedef union epoll_data
62 : {
63 : void *ptr;
64 : int fd;
65 : uint32_t u32;
66 : uint64_t u64;
67 : } epoll_data_t;
68 :
69 : struct epoll_event
70 : {
71 : uint32_t events; /* Epoll events */
72 : epoll_data_t data; /* User data variable */
73 : };
74 :
75 :
76 : __BEGIN_DECLS
77 :
78 : /* Creates an epoll instance. Returns an fd for the new instance.
79 : The "size" parameter is a hint specifying the number of file
80 : descriptors to be associated with the new instance. The fd
81 : returned by epoll_create() should be closed with close(). */
82 1420 : extern int epoll_create (int __size) __THROW;
83 :
84 :
85 : /* Manipulate an epoll instance "epfd". Returns 0 in case of success,
86 : -1 in case of error ( the "errno" variable will contain the
87 : specific error code ) The "op" parameter is one of the EPOLL_CTL_*
88 : constants defined above. The "fd" parameter is the target of the
89 : operation. The "event" parameter describes which events the caller
90 : is interested in and any associated user data. */
91 2839 : extern int epoll_ctl (int __epfd, int __op, int __fd,
92 : struct epoll_event *__event) __THROW;
93 :
94 :
95 : /* Wait for events on an epoll instance "epfd". Returns the number of
96 : triggered events returned in "events" buffer. Or -1 in case of
97 : error with the "errno" variable set to the specific error code. The
98 : "events" parameter is a buffer that will contain triggered
99 : events. The "maxevents" is the maximum number of events to be
100 : returned ( usually size of "events" ). The "timeout" parameter
101 : specifies the maximum wait time in milliseconds (-1 == infinite).
102 :
103 : This function is a cancellation point and therefore not marked with
104 : __THROW. */
105 1472 : extern int epoll_wait (int __epfd, struct epoll_event *__events,
106 : int __maxevents, int __timeout);
107 :
108 : __END_DECLS
109 :
110 : #endif /* sys/epoll.h */
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