543 lines
17 KiB
C
543 lines
17 KiB
C
|
|
/*
|
|
* Copyright (C) Igor Sysoev
|
|
* Copyright (C) NGINX, Inc.
|
|
*/
|
|
|
|
#ifndef _NXT_EVENT_ENGINE_H_INCLUDED_
|
|
#define _NXT_EVENT_ENGINE_H_INCLUDED_
|
|
|
|
/*
|
|
* An event interface is kernel interface such as kqueue, epoll, etc.
|
|
* intended to get event notifications about file descriptor state,
|
|
* signals, etc.
|
|
*/
|
|
|
|
#define NXT_FILE_EVENTS 1
|
|
#define NXT_NO_FILE_EVENTS 0
|
|
|
|
#define NXT_SIGNAL_EVENTS 1
|
|
#define NXT_NO_SIGNAL_EVENTS 0
|
|
|
|
|
|
typedef struct {
|
|
|
|
/* The canonical event set name. */
|
|
const char *name;
|
|
|
|
/*
|
|
* Create an event set. The mchanges argument is a maximum number of
|
|
* changes to send to the kernel. The mevents argument is a maximum
|
|
* number of events to retrieve from the kernel at once, if underlying
|
|
* event facility supports batch operations.
|
|
*/
|
|
nxt_int_t (*create)(nxt_event_engine_t *engine,
|
|
nxt_uint_t mchanges, nxt_uint_t mevents);
|
|
|
|
/* Close and free an event set. */
|
|
void (*free)(nxt_event_engine_t *engine);
|
|
|
|
/*
|
|
* Add a file descriptor to an event set and enable the most
|
|
* effective read and write event notification method provided
|
|
* by underlying event facility.
|
|
*/
|
|
void (*enable)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/* Disable file descriptor event notifications. */
|
|
void (*disable)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Delete a file descriptor from an event set. A possible usage
|
|
* is a moving of the file descriptor from one event set to another.
|
|
*/
|
|
void (*delete)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Delete a file descriptor from an event set before closing the
|
|
* file descriptor. The most event facilities such as Linux epoll,
|
|
* BSD kqueue, Solaris event ports, AIX pollset, and HP-UX /dev/poll
|
|
* delete a file descriptor automatically on the file descriptor close.
|
|
* Some facilities such as Solaris /dev/poll require to delete a file
|
|
* descriptor explicitly.
|
|
*/
|
|
nxt_bool_t (*close)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a file descriptor to an event set and enable the most effective
|
|
* read event notification method provided by underlying event facility.
|
|
*/
|
|
void (*enable_read)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a file descriptor to an event set and enable the most effective
|
|
* write event notification method provided by underlying event facility.
|
|
*/
|
|
void (*enable_write)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/* Disable file descriptor read event notifications. */
|
|
void (*disable_read)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/* Disable file descriptor write event notifications. */
|
|
void (*disable_write)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/* Block file descriptor read event notifications. */
|
|
void (*block_read)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/* Block file descriptor write event notifications. */
|
|
void (*block_write)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a file descriptor to an event set and enable an oneshot
|
|
* read event notification method.
|
|
*/
|
|
void (*oneshot_read)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a file descriptor to an event set and enable an oneshot
|
|
* write event notification method.
|
|
*/
|
|
void (*oneshot_write)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a listening socket descriptor to an event set and enable
|
|
* a level-triggered read event notification method.
|
|
*/
|
|
void (*enable_accept)(nxt_event_engine_t *engine,
|
|
nxt_fd_event_t *ev);
|
|
|
|
/*
|
|
* Add a file to an event set and enable a file change notification
|
|
* events.
|
|
*/
|
|
void (*enable_file)(nxt_event_engine_t *engine,
|
|
nxt_file_event_t *ev);
|
|
|
|
/*
|
|
* Delete a file from an event set before closing the file descriptor.
|
|
*/
|
|
void (*close_file)(nxt_event_engine_t *engine,
|
|
nxt_file_event_t *ev);
|
|
|
|
/*
|
|
* Enable post event notifications and set a post handler to handle
|
|
* the zero signal.
|
|
*/
|
|
nxt_int_t (*enable_post)(nxt_event_engine_t *engine,
|
|
nxt_work_handler_t handler);
|
|
|
|
/*
|
|
* Signal an event set. If a signal number is non-zero then
|
|
* a signal handler added to the event set is called. This is
|
|
* a way to route Unix signals to an event engine if underlying
|
|
* event facility does not support signal events.
|
|
*
|
|
* If a signal number is zero, then the post_handler of the event
|
|
* set is called. This has no relation to Unix signals but is
|
|
* a way to wake up the event set to process works posted to
|
|
* the event engine locked work queue.
|
|
*/
|
|
void (*signal)(nxt_event_engine_t *engine,
|
|
nxt_uint_t signo);
|
|
|
|
/* Poll an event set for new event notifications. */
|
|
void (*poll)(nxt_event_engine_t *engine,
|
|
nxt_msec_t timeout);
|
|
|
|
/* I/O operations suitable to underlying event facility. */
|
|
nxt_conn_io_t *io;
|
|
|
|
/* True if an event facility supports file change event notifications. */
|
|
uint8_t file_support; /* 1 bit */
|
|
|
|
/* True if an event facility supports signal event notifications. */
|
|
uint8_t signal_support; /* 1 bit */
|
|
} nxt_event_interface_t;
|
|
|
|
|
|
#if (NXT_HAVE_KQUEUE)
|
|
|
|
typedef struct {
|
|
int fd;
|
|
int nchanges;
|
|
int mchanges;
|
|
int mevents;
|
|
nxt_pid_t pid;
|
|
|
|
nxt_work_handler_t post_handler;
|
|
|
|
struct kevent *changes;
|
|
struct kevent *events;
|
|
} nxt_kqueue_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_kqueue_engine;
|
|
|
|
#endif
|
|
|
|
|
|
#if (NXT_HAVE_EPOLL)
|
|
|
|
typedef struct {
|
|
int op;
|
|
struct epoll_event event;
|
|
} nxt_epoll_change_t;
|
|
|
|
|
|
typedef struct {
|
|
int fd;
|
|
uint32_t mode;
|
|
nxt_uint_t nchanges;
|
|
nxt_uint_t mchanges;
|
|
int mevents;
|
|
|
|
uint8_t error; /* 1 bit */
|
|
|
|
nxt_epoll_change_t *changes;
|
|
struct epoll_event *events;
|
|
|
|
#if (NXT_HAVE_EVENTFD)
|
|
nxt_work_handler_t post_handler;
|
|
nxt_fd_event_t eventfd;
|
|
uint32_t neventfd;
|
|
#endif
|
|
|
|
#if (NXT_HAVE_SIGNALFD)
|
|
nxt_fd_event_t signalfd;
|
|
#endif
|
|
} nxt_epoll_engine_t;
|
|
|
|
|
|
extern const nxt_event_interface_t nxt_epoll_edge_engine;
|
|
extern const nxt_event_interface_t nxt_epoll_level_engine;
|
|
|
|
#endif
|
|
|
|
|
|
#if (NXT_HAVE_EVENTPORT)
|
|
|
|
typedef struct {
|
|
int events;
|
|
nxt_fd_event_t *event;
|
|
} nxt_eventport_change_t;
|
|
|
|
|
|
typedef struct {
|
|
int fd;
|
|
nxt_uint_t nchanges;
|
|
nxt_uint_t mchanges;
|
|
u_int mevents;
|
|
|
|
nxt_eventport_change_t *changes;
|
|
port_event_t *events;
|
|
|
|
nxt_work_handler_t post_handler;
|
|
nxt_work_handler_t signal_handler;
|
|
} nxt_eventport_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_eventport_engine;
|
|
|
|
#endif
|
|
|
|
|
|
#if (NXT_HAVE_DEVPOLL)
|
|
|
|
typedef struct {
|
|
uint8_t op;
|
|
short events;
|
|
nxt_fd_event_t *event;
|
|
} nxt_devpoll_change_t;
|
|
|
|
|
|
typedef struct {
|
|
int fd;
|
|
int nchanges;
|
|
int mchanges;
|
|
int mevents;
|
|
|
|
nxt_devpoll_change_t *changes;
|
|
struct pollfd *write_changes;
|
|
struct pollfd *events;
|
|
nxt_lvlhsh_t fd_hash;
|
|
} nxt_devpoll_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_devpoll_engine;
|
|
|
|
#endif
|
|
|
|
|
|
#if (NXT_HAVE_POLLSET)
|
|
|
|
typedef struct {
|
|
uint8_t op;
|
|
uint8_t cmd;
|
|
short events;
|
|
nxt_fd_event_t *event;
|
|
} nxt_pollset_change_t;
|
|
|
|
|
|
typedef struct {
|
|
pollset_t ps;
|
|
int nchanges;
|
|
int mchanges;
|
|
int mevents;
|
|
|
|
nxt_pollset_change_t *changes;
|
|
struct poll_ctl *write_changes;
|
|
struct pollfd *events;
|
|
nxt_lvlhsh_t fd_hash;
|
|
} nxt_pollset_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_pollset_engine;
|
|
|
|
#endif
|
|
|
|
|
|
typedef struct {
|
|
uint8_t op;
|
|
short events;
|
|
nxt_fd_event_t *event;
|
|
} nxt_poll_change_t;
|
|
|
|
|
|
typedef struct {
|
|
nxt_uint_t max_nfds;
|
|
nxt_uint_t nfds;
|
|
|
|
nxt_uint_t nchanges;
|
|
nxt_uint_t mchanges;
|
|
|
|
nxt_poll_change_t *changes;
|
|
struct pollfd *set;
|
|
|
|
nxt_lvlhsh_t fd_hash;
|
|
} nxt_poll_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_poll_engine;
|
|
|
|
|
|
typedef struct {
|
|
int nfds;
|
|
uint32_t update_nfds; /* 1 bit */
|
|
|
|
nxt_fd_event_t **events;
|
|
|
|
fd_set main_read_fd_set;
|
|
fd_set main_write_fd_set;
|
|
fd_set work_read_fd_set;
|
|
fd_set work_write_fd_set;
|
|
} nxt_select_engine_t;
|
|
|
|
extern const nxt_event_interface_t nxt_select_engine;
|
|
|
|
|
|
nxt_int_t nxt_fd_event_hash_add(nxt_lvlhsh_t *lvlhsh, nxt_fd_t fd,
|
|
nxt_fd_event_t *ev);
|
|
void *nxt_fd_event_hash_get(nxt_task_t *task, nxt_lvlhsh_t *lvlhsh,
|
|
nxt_fd_t fd);
|
|
void nxt_fd_event_hash_delete(nxt_task_t *task, nxt_lvlhsh_t *lvlhsh,
|
|
nxt_fd_t fd, nxt_bool_t ignore);
|
|
void nxt_fd_event_hash_destroy(nxt_lvlhsh_t *lvlhsh);
|
|
|
|
|
|
#define nxt_fd_event_disable(engine, ev) \
|
|
(engine)->event.disable(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_delete(engine, ev) \
|
|
(engine)->event.delete(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_close(engine, ev) \
|
|
(engine)->event.close(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_enable_read(engine, ev) \
|
|
(engine)->event.enable_read(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_enable_write(engine, ev) \
|
|
(engine)->event.enable_write(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_disable_read(engine, ev) \
|
|
(engine)->event.disable_read(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_disable_write(engine, ev) \
|
|
(engine)->event.disable_write(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_block_read(engine, ev) \
|
|
do { \
|
|
if (nxt_fd_event_is_active((ev)->read)) { \
|
|
(engine)->event.block_read(engine, ev); \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
#define nxt_fd_event_block_write(engine, ev) \
|
|
do { \
|
|
if (nxt_fd_event_is_active((ev)->write)) { \
|
|
(engine)->event.block_write(engine, ev); \
|
|
} \
|
|
} while (0)
|
|
|
|
|
|
#define nxt_fd_event_oneshot_read(engine, ev) \
|
|
(engine)->event.oneshot_read(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_oneshot_write(engine, ev) \
|
|
(engine)->event.oneshot_write(engine, ev)
|
|
|
|
|
|
#define nxt_fd_event_enable_accept(engine, ev) \
|
|
(engine)->event.enable_accept(engine, ev)
|
|
|
|
|
|
#define NXT_ENGINE_FIBERS 1
|
|
|
|
|
|
typedef struct {
|
|
nxt_fd_t fds[2];
|
|
nxt_fd_event_t event;
|
|
} nxt_event_engine_pipe_t;
|
|
|
|
|
|
struct nxt_event_engine_s {
|
|
nxt_task_t task;
|
|
|
|
union {
|
|
nxt_poll_engine_t poll;
|
|
nxt_select_engine_t select;
|
|
|
|
#if (NXT_HAVE_KQUEUE)
|
|
nxt_kqueue_engine_t kqueue;
|
|
#endif
|
|
#if (NXT_HAVE_EPOLL)
|
|
nxt_epoll_engine_t epoll;
|
|
#endif
|
|
#if (NXT_HAVE_EVENTPORT)
|
|
nxt_eventport_engine_t eventport;
|
|
#endif
|
|
#if (NXT_HAVE_DEVPOLL)
|
|
nxt_devpoll_engine_t devpoll;
|
|
#endif
|
|
#if (NXT_HAVE_POLLSET)
|
|
nxt_pollset_engine_t pollset;
|
|
#endif
|
|
} u;
|
|
|
|
nxt_timers_t timers;
|
|
|
|
nxt_work_queue_cache_t work_queue_cache;
|
|
nxt_work_queue_t *current_work_queue;
|
|
nxt_work_queue_t fast_work_queue;
|
|
nxt_work_queue_t accept_work_queue;
|
|
nxt_work_queue_t read_work_queue;
|
|
nxt_work_queue_t socket_work_queue;
|
|
nxt_work_queue_t connect_work_queue;
|
|
nxt_work_queue_t write_work_queue;
|
|
nxt_work_queue_t shutdown_work_queue;
|
|
nxt_work_queue_t close_work_queue;
|
|
|
|
nxt_locked_work_queue_t locked_work_queue;
|
|
|
|
nxt_event_interface_t event;
|
|
|
|
/*
|
|
* A pipe to pass event signals to the engine, if the engine's
|
|
* underlying event facility does not support user events.
|
|
*/
|
|
nxt_event_engine_pipe_t *pipe;
|
|
|
|
nxt_event_signals_t *signals;
|
|
|
|
nxt_fiber_main_t *fibers;
|
|
|
|
/* The engine ID, the main engine has ID 0. */
|
|
uint32_t id;
|
|
|
|
uint8_t shutdown; /* 1 bit */
|
|
|
|
uint32_t batch;
|
|
uint32_t connections;
|
|
uint32_t max_connections;
|
|
|
|
nxt_port_t *port;
|
|
nxt_mp_t *mem_pool;
|
|
nxt_queue_t joints;
|
|
nxt_queue_t listen_connections;
|
|
nxt_queue_t idle_connections;
|
|
nxt_array_t *mem_cache;
|
|
|
|
nxt_atomic_uint_t accepted_conns_cnt;
|
|
nxt_atomic_uint_t idle_conns_cnt;
|
|
nxt_atomic_uint_t closed_conns_cnt;
|
|
nxt_atomic_uint_t requests_cnt;
|
|
|
|
nxt_queue_link_t link;
|
|
// STUB: router link
|
|
nxt_queue_link_t link0;
|
|
};
|
|
|
|
|
|
NXT_EXPORT nxt_event_engine_t *nxt_event_engine_create(nxt_task_t *task,
|
|
const nxt_event_interface_t *interface, const nxt_sig_event_t *signals,
|
|
nxt_uint_t flags, nxt_uint_t batch);
|
|
NXT_EXPORT nxt_int_t nxt_event_engine_change(nxt_event_engine_t *engine,
|
|
const nxt_event_interface_t *interface, nxt_uint_t batch);
|
|
NXT_EXPORT void nxt_event_engine_free(nxt_event_engine_t *engine);
|
|
NXT_EXPORT void nxt_event_engine_start(nxt_event_engine_t *engine);
|
|
|
|
NXT_EXPORT void nxt_event_engine_post(nxt_event_engine_t *engine,
|
|
nxt_work_t *work);
|
|
NXT_EXPORT void nxt_event_engine_signal(nxt_event_engine_t *engine,
|
|
nxt_uint_t signo);
|
|
|
|
#define NXT_EVENT_ENGINE_NO_MEM_HINT 255
|
|
|
|
void *nxt_event_engine_mem_alloc(nxt_event_engine_t *engine, uint8_t *hint,
|
|
size_t size);
|
|
void nxt_event_engine_mem_free(nxt_event_engine_t *engine, uint8_t hint,
|
|
void *p, size_t size);
|
|
void *nxt_event_engine_buf_mem_alloc(nxt_event_engine_t *engine, size_t size);
|
|
void nxt_event_engine_buf_mem_free(nxt_event_engine_t *engine, nxt_buf_t *b);
|
|
void nxt_event_engine_buf_mem_completion(nxt_task_t *task, void *obj,
|
|
void *data);
|
|
|
|
|
|
nxt_inline nxt_event_engine_t *
|
|
nxt_thread_event_engine(void)
|
|
{
|
|
nxt_thread_t *thr;
|
|
|
|
thr = nxt_thread();
|
|
return thr->engine;
|
|
}
|
|
|
|
#if (NXT_DEBUG)
|
|
|
|
NXT_EXPORT void nxt_event_engine_thread_adopt(nxt_event_engine_t *engine);
|
|
|
|
#else
|
|
|
|
#define nxt_event_engine_thread_adopt(_engine)
|
|
|
|
#endif
|
|
|
|
|
|
#endif /* _NXT_EVENT_ENGINE_H_INCLUDED_ */
|