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3b6ff1d22f
I don't know how to deal with select's exception fds in libevent, so some functions may not work properly.
51 lines
1.5 KiB
C
51 lines
1.5 KiB
C
#ifndef EL__MAIN_SELECT_H
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#define EL__MAIN_SELECT_H
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typedef void (*select_handler_T)(void *);
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/* Start the select loop after calling the passed @init() function. */
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void select_loop(void (*init)(void));
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/* Get information about the number of descriptors being checked by the select
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* loop. */
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int get_file_handles_count(void);
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/* Schedule work to be done when appropriate in the future. */
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int register_bottom_half_do(select_handler_T work_handler, void *data);
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/* Wrapper to remove a lot of casts from users of bottom halves. */
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#define register_bottom_half(fn, data) \
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register_bottom_half_do((select_handler_T) (fn), (void *) (data))
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/* Check and run scheduled work. */
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void check_bottom_halves(void);
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enum select_handler_type {
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SELECT_HANDLER_READ,
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SELECT_HANDLER_WRITE,
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SELECT_HANDLER_ERROR,
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SELECT_HANDLER_DATA,
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};
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/* Get a registered select handler. */
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select_handler_T get_handler(int fd, enum select_handler_type type);
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/* Set handlers and callback @data for the @fd descriptor. */
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void set_handlers(int fd,
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select_handler_T read_handler,
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select_handler_T write_handler,
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select_handler_T error_handler,
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void *data);
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/* Clear handlers associated with @fd. */
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#define clear_handlers(fd) \
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set_handlers(fd, NULL, NULL, NULL, NULL)
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/* Checks which can be used for querying the read/write state of the @fd
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* descriptor without blocking. The interlink code are the only users. */
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int can_read(int fd);
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int can_write(int fd);
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void terminate_select(void);
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#endif
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