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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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 | /* Copyright (C) 2002-2012 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public License as published by the Free Software Foundation; either version 2.1 of the License, or (at your option) any later version. The GNU C Library is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ #ifndef _SYS_EPOLL_H #define _SYS_EPOLL_H 1 #include <stdint.h> #include <sys/types.h> /* Get __sigset_t. */ #include <bits/sigset.h> #ifndef __sigset_t_defined # define __sigset_t_defined typedef __sigset_t sigset_t; #endif /* Get the platform-dependent flags. */ #include <bits/epoll.h> #ifndef __EPOLL_PACKED # define __EPOLL_PACKED #endif enum EPOLL_EVENTS { EPOLLIN = 0x001, #define EPOLLIN EPOLLIN EPOLLPRI = 0x002, #define EPOLLPRI EPOLLPRI EPOLLOUT = 0x004, #define EPOLLOUT EPOLLOUT EPOLLRDNORM = 0x040, #define EPOLLRDNORM EPOLLRDNORM EPOLLRDBAND = 0x080, #define EPOLLRDBAND EPOLLRDBAND EPOLLWRNORM = 0x100, #define EPOLLWRNORM EPOLLWRNORM EPOLLWRBAND = 0x200, #define EPOLLWRBAND EPOLLWRBAND EPOLLMSG = 0x400, #define EPOLLMSG EPOLLMSG EPOLLERR = 0x008, #define EPOLLERR EPOLLERR EPOLLHUP = 0x010, #define EPOLLHUP EPOLLHUP EPOLLRDHUP = 0x2000, #define EPOLLRDHUP EPOLLRDHUP EPOLLONESHOT = 1u << 30, #define EPOLLONESHOT EPOLLONESHOT EPOLLET = 1u << 31 #define EPOLLET EPOLLET }; /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */ #define EPOLL_CTL_ADD 1 /* Add a file descriptor to the interface. */ #define EPOLL_CTL_DEL 2 /* Remove a file descriptor from the interface. */ #define EPOLL_CTL_MOD 3 /* Change file descriptor epoll_event structure. */ typedef union epoll_data { void *ptr; int fd; uint32_t u32; uint64_t u64; } epoll_data_t; struct epoll_event { uint32_t events; /* Epoll events */ epoll_data_t data; /* User data variable */ } __EPOLL_PACKED; __BEGIN_DECLS /* Creates an epoll instance. Returns an fd for the new instance. The "size" parameter is a hint specifying the number of file descriptors to be associated with the new instance. The fd returned by epoll_create() should be closed with close(). */ extern int epoll_create (int __size) __THROW; /* Same as epoll_create but with a FLAGS parameter. The unused SIZE parameter has been dropped. */ extern int epoll_create1 (int __flags) __THROW; /* Manipulate an epoll instance "epfd". Returns 0 in case of success, -1 in case of error ( the "errno" variable will contain the specific error code ) The "op" parameter is one of the EPOLL_CTL_* constants defined above. The "fd" parameter is the target of the operation. The "event" parameter describes which events the caller is interested in and any associated user data. */ extern int epoll_ctl (int __epfd, int __op, int __fd, struct epoll_event *__event) __THROW; /* Wait for events on an epoll instance "epfd". Returns the number of triggered events returned in "events" buffer. Or -1 in case of error with the "errno" variable set to the specific error code. The "events" parameter is a buffer that will contain triggered events. The "maxevents" is the maximum number of events to be returned ( usually size of "events" ). The "timeout" parameter specifies the maximum wait time in milliseconds (-1 == infinite). This function is a cancellation point and therefore not marked with __THROW. */ extern int epoll_wait (int __epfd, struct epoll_event *__events, int __maxevents, int __timeout); /* Same as epoll_wait, but the thread's signal mask is temporarily and atomically replaced with the one provided as parameter. This function is a cancellation point and therefore not marked with __THROW. */ extern int epoll_pwait (int __epfd, struct epoll_event *__events, int __maxevents, int __timeout, const __sigset_t *__ss); __END_DECLS #endif /* sys/epoll.h */ |