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d614a753 | 1 | /* Copyright (C) 2002-2020 Free Software Foundation, Inc. |
ad3bf20c UD |
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 | |
59ba27a6 | 15 | License along with the GNU C Library; if not, see |
5a82c748 | 16 | <https://www.gnu.org/licenses/>. */ |
ad3bf20c UD |
17 | |
18 | #ifndef _SYS_EPOLL_H | |
19 | #define _SYS_EPOLL_H 1 | |
20 | ||
30969512 | 21 | #include <stdint.h> |
ad3bf20c UD |
22 | #include <sys/types.h> |
23 | ||
a992f506 | 24 | #include <bits/types/sigset_t.h> |
11bf311e | 25 | |
599af3ca JM |
26 | /* Get the platform-dependent flags. */ |
27 | #include <bits/epoll.h> | |
ad3bf20c | 28 | |
599af3ca JM |
29 | #ifndef __EPOLL_PACKED |
30 | # define __EPOLL_PACKED | |
31 | #endif | |
bdcebfc4 UD |
32 | |
33 | ||
ad3bf20c UD |
34 | enum EPOLL_EVENTS |
35 | { | |
36 | EPOLLIN = 0x001, | |
37 | #define EPOLLIN EPOLLIN | |
38 | EPOLLPRI = 0x002, | |
39 | #define EPOLLPRI EPOLLPRI | |
40 | EPOLLOUT = 0x004, | |
41 | #define EPOLLOUT EPOLLOUT | |
42 | EPOLLRDNORM = 0x040, | |
43 | #define EPOLLRDNORM EPOLLRDNORM | |
44 | EPOLLRDBAND = 0x080, | |
45 | #define EPOLLRDBAND EPOLLRDBAND | |
46 | EPOLLWRNORM = 0x100, | |
47 | #define EPOLLWRNORM EPOLLWRNORM | |
48 | EPOLLWRBAND = 0x200, | |
49 | #define EPOLLWRBAND EPOLLWRBAND | |
50 | EPOLLMSG = 0x400, | |
51 | #define EPOLLMSG EPOLLMSG | |
52 | EPOLLERR = 0x008, | |
53 | #define EPOLLERR EPOLLERR | |
5e826ab5 | 54 | EPOLLHUP = 0x010, |
ad3bf20c | 55 | #define EPOLLHUP EPOLLHUP |
94833f11 UD |
56 | EPOLLRDHUP = 0x2000, |
57 | #define EPOLLRDHUP EPOLLRDHUP | |
981569c7 JM |
58 | EPOLLEXCLUSIVE = 1u << 28, |
59 | #define EPOLLEXCLUSIVE EPOLLEXCLUSIVE | |
f8d44fdc AJ |
60 | EPOLLWAKEUP = 1u << 29, |
61 | #define EPOLLWAKEUP EPOLLWAKEUP | |
4920765e | 62 | EPOLLONESHOT = 1u << 30, |
e11676dd | 63 | #define EPOLLONESHOT EPOLLONESHOT |
4920765e | 64 | EPOLLET = 1u << 31 |
5e826ab5 | 65 | #define EPOLLET EPOLLET |
ad3bf20c UD |
66 | }; |
67 | ||
68 | ||
69 | /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */ | |
bdcebfc4 UD |
70 | #define EPOLL_CTL_ADD 1 /* Add a file descriptor to the interface. */ |
71 | #define EPOLL_CTL_DEL 2 /* Remove a file descriptor from the interface. */ | |
72 | #define EPOLL_CTL_MOD 3 /* Change file descriptor epoll_event structure. */ | |
ad3bf20c UD |
73 | |
74 | ||
75 | typedef union epoll_data | |
76 | { | |
77 | void *ptr; | |
78 | int fd; | |
79 | uint32_t u32; | |
80 | uint64_t u64; | |
81 | } epoll_data_t; | |
82 | ||
83 | struct epoll_event | |
84 | { | |
85 | uint32_t events; /* Epoll events */ | |
86 | epoll_data_t data; /* User data variable */ | |
599af3ca | 87 | } __EPOLL_PACKED; |
ad3bf20c UD |
88 | |
89 | ||
90 | __BEGIN_DECLS | |
91 | ||
92 | /* Creates an epoll instance. Returns an fd for the new instance. | |
93 | The "size" parameter is a hint specifying the number of file | |
94 | descriptors to be associated with the new instance. The fd | |
95 | returned by epoll_create() should be closed with close(). */ | |
96 | extern int epoll_create (int __size) __THROW; | |
97 | ||
ebcc1f4d UD |
98 | /* Same as epoll_create but with an FLAGS parameter. The unused SIZE |
99 | parameter has been dropped. */ | |
100 | extern int epoll_create1 (int __flags) __THROW; | |
bdcebfc4 | 101 | |
ad3bf20c UD |
102 | |
103 | /* Manipulate an epoll instance "epfd". Returns 0 in case of success, | |
104 | -1 in case of error ( the "errno" variable will contain the | |
105 | specific error code ) The "op" parameter is one of the EPOLL_CTL_* | |
106 | constants defined above. The "fd" parameter is the target of the | |
107 | operation. The "event" parameter describes which events the caller | |
108 | is interested in and any associated user data. */ | |
109 | extern int epoll_ctl (int __epfd, int __op, int __fd, | |
110 | struct epoll_event *__event) __THROW; | |
111 | ||
112 | ||
113 | /* Wait for events on an epoll instance "epfd". Returns the number of | |
114 | triggered events returned in "events" buffer. Or -1 in case of | |
115 | error with the "errno" variable set to the specific error code. The | |
116 | "events" parameter is a buffer that will contain triggered | |
117 | events. The "maxevents" is the maximum number of events to be | |
118 | returned ( usually size of "events" ). The "timeout" parameter | |
7761a3ac UD |
119 | specifies the maximum wait time in milliseconds (-1 == infinite). |
120 | ||
121 | This function is a cancellation point and therefore not marked with | |
122 | __THROW. */ | |
ad3bf20c | 123 | extern int epoll_wait (int __epfd, struct epoll_event *__events, |
7761a3ac | 124 | int __maxevents, int __timeout); |
ad3bf20c | 125 | |
11bf311e UD |
126 | |
127 | /* Same as epoll_wait, but the thread's signal mask is temporarily | |
128 | and atomically replaced with the one provided as parameter. | |
129 | ||
130 | This function is a cancellation point and therefore not marked with | |
131 | __THROW. */ | |
132 | extern int epoll_pwait (int __epfd, struct epoll_event *__events, | |
133 | int __maxevents, int __timeout, | |
a784e502 | 134 | const __sigset_t *__ss); |
11bf311e | 135 | |
ad3bf20c UD |
136 | __END_DECLS |
137 | ||
138 | #endif /* sys/epoll.h */ |