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/*
* Copyright 2017 Google Inc.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This program 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 General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301, USA.
*/
/*
* Author: weiwan@google.com (Wei Wang)
*
* Interface for tracking epolls in the kernel under test.
*/
#ifndef __EPOLL_HDR_H__
#define __EPOLL_HDR_H__
#include "types.h"
#include "fd_state.h"
/* Type specification for epoll_event->data */
enum epoll_data_type_t {
EPOLL_DATA_PTR = 1,
EPOLL_DATA_FD,
EPOLL_DATA_U32,
EPOLL_DATA_U64,
};
/* The runtime state for epoll */
struct epoll {
/* NOTE: struct fd_state must be first field in all fd flavors. */
struct fd_state fd; /* info about fd for this epoll event */
};
/* Convert to epoll pointer if the fd has type FD_EPOLL,
* otherwise return NULL.
*/
static inline struct epoll *fd_to_epoll(struct fd_state *fd)
{
if (fd && fd->ops->type == FD_EPOLL)
return (struct epoll *)fd;
else
return NULL;
}
struct state;
/* Allocate and return a new epoll object. */
extern struct epoll *epoll_new(struct state *state);
#endif /* __EPOLL_HDR_H__ */
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