epoll.h
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上传日期:2009-04-28
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- /* Copyright (C) 2002, 2003, 2004 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, write to the Free
- Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
- 02111-1307 USA. */
- #ifndef _SYS_EPOLL_H
- #define _SYS_EPOLL_H 1
- #include <stdint.h>
- #include <sys/types.h>
- 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
- EPOLLONESHOT = (1 << 30),
- #define EPOLLONESHOT EPOLLONESHOT
- EPOLLET = (1 << 31)
- #define EPOLLET EPOLLET
- };
- /* Valid opcodes ( "op" parameter ) to issue to epoll_ctl(). */
- #define EPOLL_CTL_ADD 1 /* Add a file decriptor to the interface. */
- #define EPOLL_CTL_DEL 2 /* Remove a file decriptor from the interface. */
- #define EPOLL_CTL_MOD 3 /* Change file decriptor 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 */
- };
- __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;
- /* 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). */
- extern int epoll_wait (int __epfd, struct epoll_event *__events,
- int __maxevents, int __timeout) __THROW;
- __END_DECLS
- #endif /* sys/epoll.h */