src/lib/ioloop-private.h

#ifndef IOLOOP_PRIVATE_H
#define IOLOOP_PRIVATE_H

#include "priorityq.h"
#include "ioloop.h"
#include "array-decl.h"

#ifndef IOLOOP_INITIAL_FD_COUNT
#  define IOLOOP_INITIAL_FD_COUNT 128
#endif

struct ioloop {
        struct ioloop *prev;

    struct ioloop_context *cur_ctx;

    struct io_file *io_files;
    struct io_file *next_io_file;
    struct priorityq *timeouts;
    ARRAY(struct timeout *) timeouts_new;
    struct io_wait_timer *wait_timers;

        struct ioloop_handler_context *handler_context;
        struct ioloop_notify_handler_context *notify_handler_context;
    unsigned int max_fd_count;

    io_loop_time_moved_callback_t *time_moved_callback;
    time_t next_max_time;
    uint64_t ioloop_wait_usecs;
    struct timeval wait_started;

    unsigned int io_pending_count;

    bool running:1;
    bool iolooping:1;
};

struct io {
    enum io_condition condition;
    const char *source_filename;
    unsigned int source_linenum;
    /* trigger I/O callback even if OS doesn't think there is input
       pending */
    bool pending;

    io_callback_t *callback;
        void *context;

    struct ioloop *ioloop;
    struct ioloop_context *ctx;
};

struct io_file {
    struct io io;

    /* use a doubly linked list so that io_remove() is quick */
    struct io_file *prev, *next;

    int refcount;
    int fd;

    /* only for io_add_istream(), a bit kludgy to be here.. */
    struct istream *istream;
};

struct timeout {
    struct priorityq_item item;
    const char *source_filename;
    unsigned int source_linenum;

        unsigned int msecs;
    struct timeval next_run;

    timeout_callback_t *callback;
        void *context;

    struct ioloop *ioloop;
    struct ioloop_context *ctx;

    bool one_shot:1;
};

struct io_wait_timer {
    struct io_wait_timer *prev, *next;
    const char *source_filename;
    unsigned int source_linenum;

    struct ioloop *ioloop;
    uint64_t usecs;
};

struct ioloop_context_callback {
    io_callback_t *activate;
    io_callback_t *deactivate;
    void *context;
    bool activated;
};

struct ioloop_context {
    int refcount;
    struct ioloop *ioloop;
    ARRAY(struct ioloop_context_callback) callbacks;
};

int io_loop_get_wait_time(struct ioloop *ioloop, struct timeval *tv_r);
void io_loop_handle_timeouts(struct ioloop *ioloop);
void io_loop_call_io(struct io *io);

void io_loop_handler_run_internal(struct ioloop *ioloop);

/* I/O handler calls */
void io_loop_handle_add(struct io_file *io);
void io_loop_handle_remove(struct io_file *io, bool closed);

void io_loop_handler_init(struct ioloop *ioloop, unsigned int initial_fd_count);
void io_loop_handler_deinit(struct ioloop *ioloop);

void io_loop_notify_remove(struct io *io);
void io_loop_notify_handler_deinit(struct ioloop *ioloop);

#endif