From 7334cfc680d557f2385c98d1b2a4f114955d5049 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Thu, 6 Jan 2005 03:06:49 +0000 Subject: Justin Cormack writes: Here is a small patch to add epoll support to uclibc. The only thing I am not sure about is what needs to be done (if anything) to make it work on 2.4/2.2 kernels (are the syscall numbers defined but give errors when called or not?). Tested on 2.6, though some other issues prevent more extensive testing at the minute. Mike Frysinger: cleaned up patch and added checks to make sure that the syscall actually exists, returning ENOSYS in cases where it doesn't. --- include/sys/epoll.h | 107 ++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 107 insertions(+) create mode 100644 include/sys/epoll.h (limited to 'include') diff --git a/include/sys/epoll.h b/include/sys/epoll.h new file mode 100644 index 000000000..cffddb58b --- /dev/null +++ b/include/sys/epoll.h @@ -0,0 +1,107 @@ +/* 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 +#include + + +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 */ +} __attribute__ ((__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; + + +/* 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 */ -- cgit v1.2.3