2024年3月13日发(作者：)

struct common_timeout_list **common_timeout_queues;

/** The number of entries used in common_timeout_queues */

int n_common_timeouts;

/** The total size of common_timeout_queues. */

int n_common_timeouts_allocated;

/** Mapping from file descriptors to enabled (added) events */

struct event_io_map io;

/** Mapping from signal numbers to enabled (added) events. */

struct event_signal_map sigmap;

/** Priority queue of events with timeouts. */

struct min_heap timeheap;

/** Stored timeval: used to avoid calling gettimeofday/clock_gettime

* too often. */

struct timeval tv_cache;

struct evutil_monotonic_timer monotonic_timer;

/** Difference between internal time (maybe from clock_gettime) and

* gettimeofday. */

struct timeval tv_clock_diff;

/** Second in which we last updated tv_clock_diff, in monotonic time. */

time_t last_updated_clock_diff;

#ifndef EVENT__DISABLE_THREAD_SUPPORT

/* threading support */

/** The thread currently running the event_loop for this base */

unsigned long th_owner_id;

/** A lock to prevent conflicting accesses to this event_base */

void *th_base_lock;

/** A condition that gets signalled when we're done processing an

* event with waiters on it. */

void *current_event_cond;

/** Number of threads blocking on current_event_cond. */

int current_event_waiters;

#endif

/** The event whose callback is executing right now */

struct event_callback *current_event;

#ifdef _WIN32

/** IOCP support structure, if IOCP is enabled. */

struct event_iocp_port *iocp;

#endif

/** Flags that this base was configured with */

enum event_base_config_flag flags;

struct timeval max_dispatch_time;

int max_dispatch_callbacks;

int limit_callbacks_after_prio;

/* Notify main thread to wake up break, etc. */

/** True if the base already has a pending notify, and we don't need

* to add any more. */

int is_notify_pending;

/** A socketpair used by some th_notify functions to wake up the main

* thread. */

evutil_socket_t th_notify_fd[2];

/** An event used by some th_notify functions to wake up the main

* thread. */

struct event th_notify;

/** A function used to wake up the main thread from another thread. */

int (*th_notify_fn)(struct event_base *base);

/** Saved seed for weak random number generator. Some backends use

* this to produce fairness among sockets. Protected by th_base_lock. */

struct evutil_weakrand_state weakrand_seed;

/** List of event_onces that have not yet fired. */

LIST_HEAD(once_event_list, event_once) once_events;

/** "Prepare" and "check" watchers. */

struct evwatch_list watchers[EVWATCH_MAX];

};