lighttpd 1.4.x https://www.lighttpd.net/
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#ifndef _FDEVENT_H_
#define _FDEVENT_H_
#ifdef HAVE_CONFIG_H
# include "config.h"
#endif
#include "settings.h"
#include "bitset.h"
#if defined HAVE_STDINT_H
# include <stdint.h>
#elif defined HAVE_INTTYPES_H
# include <inttypes.h>
#endif
#include <sys/types.h>
/* select event-system */
#if defined(HAVE_EPOLL_CTL) && defined(HAVE_SYS_EPOLL_H)
# define USE_LINUX_EPOLL
# include <sys/epoll.h>
#endif
/* MacOS 10.3.x has poll.h under /usr/include/, all other unixes
* under /usr/include/sys/ */
#if defined HAVE_POLL && (defined(HAVE_SYS_POLL_H) || defined(HAVE_POLL_H))
# define USE_POLL
# ifdef HAVE_POLL_H
# include <poll.h>
# else
# include <sys/poll.h>
# endif
#endif
#if defined HAVE_SELECT
# ifdef __WIN32
# include <winsock2.h>
# endif
# define USE_SELECT
# ifdef HAVE_SYS_SELECT_H
# include <sys/select.h>
# endif
#endif
#if defined HAVE_SYS_DEVPOLL_H && defined(__sun)
# define USE_SOLARIS_DEVPOLL
# include <sys/devpoll.h>
#endif
#if defined HAVE_SYS_EVENT_H && defined HAVE_KQUEUE
# define USE_FREEBSD_KQUEUE
# include <sys/event.h>
#endif
#if defined HAVE_SYS_PORT_H && defined HAVE_PORT_CREATE
# define USE_SOLARIS_PORT
# include <sys/port.h>
#endif
#if defined HAVE_LIBEV
# define USE_LIBEV
# include <ev.h>
#endif
struct server;
typedef handler_t (*fdevent_handler)(struct server *srv, void *ctx, int revents);
/* these are the POLL* values from <bits/poll.h> (linux poll)
*/
#define FDEVENT_IN BV(0)
#define FDEVENT_PRI BV(1)
#define FDEVENT_OUT BV(2)
#define FDEVENT_ERR BV(3)
#define FDEVENT_HUP BV(4)
#define FDEVENT_NVAL BV(5)
typedef enum { FD_EVENT_TYPE_UNSET = -1,
FD_EVENT_TYPE_CONNECTION,
FD_EVENT_TYPE_FCGI_CONNECTION,
FD_EVENT_TYPE_DIRWATCH,
FD_EVENT_TYPE_CGI_CONNECTION
} fd_event_t;
typedef enum { FDEVENT_HANDLER_UNSET,
FDEVENT_HANDLER_SELECT,
FDEVENT_HANDLER_POLL,
FDEVENT_HANDLER_LINUX_SYSEPOLL,
FDEVENT_HANDLER_SOLARIS_DEVPOLL,
FDEVENT_HANDLER_FREEBSD_KQUEUE,
FDEVENT_HANDLER_SOLARIS_PORT,
FDEVENT_HANDLER_LIBEV
} fdevent_handler_t;
typedef struct _fdnode {
fdevent_handler handler;
void *ctx;
void *handler_ctx;
int fd;
} fdnode;
/**
* array of unused fd's
*
*/
typedef struct {
int *ptr;
size_t used;
size_t size;
} buffer_int;
/**
* fd-event handler for select(), poll() and rt-signals on Linux 2.4
*
*/
typedef struct fdevents {
struct server *srv;
fdevent_handler_t type;
fdnode **fdarray;
size_t maxfds;
#ifdef USE_LINUX_EPOLL
int epoll_fd;
struct epoll_event *epoll_events;
#endif
#ifdef USE_POLL
struct pollfd *pollfds;
size_t size;
size_t used;
buffer_int unused;
#endif
#ifdef USE_SELECT
fd_set select_read;
fd_set select_write;
fd_set select_error;
fd_set select_set_read;
fd_set select_set_write;
fd_set select_set_error;
int select_max_fd;
#endif
#ifdef USE_SOLARIS_DEVPOLL
int devpoll_fd;
struct pollfd *devpollfds;
#endif
#ifdef USE_FREEBSD_KQUEUE
int kq_fd;
struct kevent *kq_results;
#endif
#ifdef USE_SOLARIS_PORT
int port_fd;
#endif
#ifdef USE_LIBEV
struct ev_loop *libev_loop;
#endif
int (*reset)(struct fdevents *ev);
void (*free)(struct fdevents *ev);
int (*event_add)(struct fdevents *ev, int fde_ndx, int fd, int events);
int (*event_del)(struct fdevents *ev, int fde_ndx, int fd);
int (*event_get_revent)(struct fdevents *ev, size_t ndx);
int (*event_get_fd)(struct fdevents *ev, size_t ndx);
int (*event_next_fdndx)(struct fdevents *ev, int ndx);
int (*poll)(struct fdevents *ev, int timeout_ms);
int (*fcntl_set)(struct fdevents *ev, int fd);
} fdevents;
fdevents *fdevent_init(struct server *srv, size_t maxfds, fdevent_handler_t type);
int fdevent_reset(fdevents *ev); /* "init" after fork() */
void fdevent_free(fdevents *ev);
int fdevent_event_add(fdevents *ev, int *fde_ndx, int fd, int events);
int fdevent_event_del(fdevents *ev, int *fde_ndx, int fd);
int fdevent_event_get_revent(fdevents *ev, size_t ndx);
int fdevent_event_get_fd(fdevents *ev, size_t ndx);
fdevent_handler fdevent_get_handler(fdevents *ev, int fd);
void * fdevent_get_context(fdevents *ev, int fd);
int fdevent_event_next_fdndx(fdevents *ev, int ndx);
int fdevent_poll(fdevents *ev, int timeout_ms);
int fdevent_register(fdevents *ev, int fd, fdevent_handler handler, void *ctx);
int fdevent_unregister(fdevents *ev, int fd);
int fdevent_fcntl_set(fdevents *ev, int fd);
int fdevent_select_init(fdevents *ev);
int fdevent_poll_init(fdevents *ev);
int fdevent_linux_sysepoll_init(fdevents *ev);
int fdevent_solaris_devpoll_init(fdevents *ev);
int fdevent_freebsd_kqueue_init(fdevents *ev);
int fdevent_libev_init(fdevents *ev);
#endif