121 lines
3.3 KiB
C
121 lines
3.3 KiB
C
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/*
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* Copyright (C) Igor Sysoev
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* Copyright (C) NGINX, Inc.
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*/
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#ifndef _NXT_FD_EVENT_H_INCLUDED_
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#define _NXT_FD_EVENT_H_INCLUDED_
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typedef enum {
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/* A completely inactive event. */
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NXT_EVENT_INACTIVE = 0,
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/*
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* An event presents in the kernel but disabled after oneshot.
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* Used by epoll.
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*/
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NXT_EVENT_DISABLED,
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/*
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* An event is active in the kernel but blocked by application.
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* Used by kqueue, epoll, eventport, devpoll, and pollset.
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*/
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NXT_EVENT_BLOCKED,
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/*
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* An active oneshot event.
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* Used by epoll, devpoll, pollset, poll, and select.
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*/
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NXT_EVENT_ONESHOT,
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/* An active level-triggered event. Used by eventport. */
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NXT_EVENT_LEVEL,
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/*
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* An active default event. The event type depends on interface:
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* edge-triggered for kqueue, and modern epoll;
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* level-triggered for old epoll, devpoll, pollset, poll, and select;
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* oneshot for kqueue and eventport.
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*/
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NXT_EVENT_DEFAULT,
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NXT_EVENT_ACTIVE = NXT_EVENT_DEFAULT,
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} nxt_fd_event_state_t;
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#define \
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nxt_fd_event_is_disabled(state) \
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((state) < NXT_EVENT_ONESHOT)
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#define \
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nxt_fd_event_is_active(state) \
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((state) >= NXT_EVENT_ONESHOT)
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struct nxt_fd_event_s {
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void *data;
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/* Both are int's. */
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nxt_socket_t fd;
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nxt_err_t error;
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/* The flags should also be prefetched by nxt_work_queue_pop(). */
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#if (NXT_64BIT)
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nxt_fd_event_state_t read:8; /* 3 bits. */
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nxt_fd_event_state_t write:8; /* 3 bits. */
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uint8_t read_ready;
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uint8_t write_ready;
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uint8_t changing;
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uint8_t closed;
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uint8_t timedout;
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uint8_t shutdown:1;
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#if (NXT_HAVE_EPOLL)
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uint8_t epoll_eof:1;
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uint8_t epoll_error:1;
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#endif
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#if (NXT_HAVE_KQUEUE)
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uint8_t kq_eof:1;
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#endif
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#else /* NXT_32BIT */
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nxt_fd_event_state_t read:3;
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nxt_fd_event_state_t write:3;
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uint8_t read_ready:1;
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uint8_t write_ready:1;
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uint8_t changing:1;
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uint8_t closed:1;
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uint8_t timedout:1;
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uint8_t shutdown:1;
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#if (NXT_HAVE_EPOLL)
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uint8_t epoll_eof:1;
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uint8_t epoll_error:1;
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#endif
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#if (NXT_HAVE_KQUEUE)
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uint8_t kq_eof:1;
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#endif
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#endif /* NXT_64BIT */
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#if (NXT_HAVE_KQUEUE)
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/* nxt_err_t is int. */
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nxt_err_t kq_errno;
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/* struct kevent.data is intptr_t, however int32_t is enough. */
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int32_t kq_available;
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#endif
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nxt_task_t *task;
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nxt_work_queue_t *read_work_queue;
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nxt_work_handler_t read_handler;
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nxt_work_queue_t *write_work_queue;
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nxt_work_handler_t write_handler;
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nxt_work_handler_t error_handler;
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nxt_log_t *log;
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};
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#endif /* _NXT_FD_EVENT_H_INCLUDED_ */
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