include/common/epoll.h

/*
  include/common/epoll.h
  epoll definitions for older libc.

  Copyright (C) 2000-2006 Willy Tarreau - w@1wt.eu
  
  This 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, version 2.1
  exclusively.

  This 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 this library; if not, write to the Free Software
  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
*/

/*
 * Those constants were found both in glibc and in the Linux kernel.
 * They are provided here because the epoll() syscall is featured in
 * some kernels but in not often included in the glibc, so it needs
 * just a basic definition.
 */

#ifndef _COMMON_EPOLL_H
#define _COMMON_EPOLL_H

#include <stdint.h>
#include <linux/unistd.h>

#include <common/config.h>

/* epoll_ctl() commands */
#ifndef EPOLL_CTL_ADD
#define EPOLL_CTL_ADD 1
#define EPOLL_CTL_DEL 2
#define EPOLL_CTL_MOD 3
#endif

/* events types (bit fields) */
#ifndef EPOLLIN
#define EPOLLIN 1
#define EPOLLPRI 2
#define EPOLLOUT 4
#define EPOLLERR 8
#define EPOLLHUP 16
#define EPOLLONESHOT (1 << 30)
#define EPOLLET (1 << 31)
#endif

struct epoll_event {
	uint32_t events;
	union {
		void *ptr;
		int fd;
		uint32_t u32;
		uint64_t u64;
	} data;
};


#if defined(__powerpc__) || defined(__powerpc64__)
#define __NR_epoll_create 236
#define __NR_epoll_ctl    237
#define __NR_epoll_wait   238
#elif defined(__sparc__) || defined(__sparc64__)
#define __NR_epoll_create 193
#define __NR_epoll_ctl    194
#define __NR_epoll_wait   195
#elif defined(__x86_64__)
#define __NR_epoll_create 213
#define __NR_epoll_ctl    214
#define __NR_epoll_wait   215
#elif defined(__alpha__)
#define __NR_epoll_create 407
#define __NR_epoll_ctl    408
#define __NR_epoll_wait   409
#elif defined (__i386__)
#define __NR_epoll_create 254
#define __NR_epoll_ctl    255
#define __NR_epoll_wait   256
#else
#warning unsupported architecture, guessing __NR_epoll_create=254 like x86...
#define __NR_epoll_create 254
#define __NR_epoll_ctl    255
#define __NR_epoll_wait   256
#endif

extern int epoll_create(int size);
extern int epoll_ctl(int epfd, int op, int fd, struct epoll_event * event);
extern int epoll_wait(int epfd, struct epoll_event * events, int maxevents, int timeout);

#endif /* _COMMON_EPOLL_H */


/*
 * Local variables:
 *  c-indent-level: 8
 *  c-basic-offset: 8
 * End:
 */