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mirror of https://github.com/rkd77/elinks.git synced 2024-06-20 00:15:31 +00:00
elinks/src/main/select.h
Witold Filipczyk b53bcce570 [libevent] copied related to signals code from links2
I don't know how it works, but CTRL-Z suspends without additional
keystrokes when libevent is enabled.
2024-03-08 21:14:17 +01:00

157 lines
3.6 KiB
C

#ifndef EL__MAIN_SELECT_H
#define EL__MAIN_SELECT_H
#if defined(HAVE_LIBEV) && !defined(OPENVMS) && !defined(DOS)
#ifdef HAVE_LIBEV_EVENT_H
#include <libev/event.h>
#elif defined(HAVE_EVENT_H)
#include <event.h>
#endif
#define USE_LIBEVENT
#endif
#if (defined(HAVE_EVENT2_EVENT_H) || defined(HAVE_EV_EVENT_H) || defined(HAVE_LIBEV_EVENT_H)) && defined(HAVE_LIBEVENT) && !defined(OPENVMS) && !defined(DOS)
#if defined(HAVE_EVENT2_EVENT_H)
#include <event2/event.h>
#include <event2/event_compat.h>
#include <event2/event_struct.h>
#elif defined(HAVE_EV_EVENT_H)
#include <ev-event.h>
#endif
#define USE_LIBEVENT
#endif
#ifdef CONFIG_LIBCURL
#include <curl/curl.h>
#endif
#include "main/timer.h"
#ifdef __cplusplus
extern "C" {
#endif
#define EINTRLOOPX(ret_, call_, x_) \
do { \
(ret_) = (call_); \
} while ((ret_) == (x_) && errno == EINTR)
#define EINTRLOOP(ret_, call_) EINTRLOOPX(ret_, call_, -1)
#ifndef NO_SIGNAL_HANDLERS
extern pid_t signal_pid;
extern int signal_pipe[2];
#endif
#if defined(CONFIG_LIBCURL) && defined(CONFIG_LIBEVENT)
/* Global information, common to all connections */
typedef struct _GlobalInfo
{
timer_id_T tim;
struct event_base *evbase;
struct event timer_event;
CURLM *multi;
int still_running;
FILE *input;
int stopped;
} GlobalInfo;
extern GlobalInfo g;
void check_multi_info(GlobalInfo *g);
void mcode_or_die(const char *where, CURLMcode code);
#endif
#if defined(CONFIG_LIBCURL) && defined(CONFIG_LIBEV)
/* Global information, common to all connections */
typedef struct _GlobalInfo
{
timer_id_T tim;
struct ev_loop *loop;
struct ev_timer timer_event;
CURLM *multi;
int still_running;
FILE *input;
} GlobalInfo;
extern GlobalInfo g;
void check_multi_info(GlobalInfo *g);
void mcode_or_die(const char *where, CURLMcode code);
#endif
#if defined(CONFIG_LIBCURL) && !defined(CONFIG_LIBEV) && !defined(CONFIG_LIBEVENT)
/* Global information, common to all connections */
typedef struct _GlobalInfo
{
timer_id_T tim;
CURLM *multi;
int still_running;
FILE *input;
} GlobalInfo;
extern GlobalInfo g;
void check_multi_info(GlobalInfo *g);
void mcode_or_die(const char *where, CURLMcode code);
#endif
typedef void (*select_handler_T)(void *);
/* Start the select loop after calling the passed @init() function. */
void select_loop(void (*init)(void));
/* Get information about the number of descriptors being checked by the select
* loop. */
int get_file_handles_count(void);
/* Schedule work to be done when appropriate in the future. */
int register_bottom_half_do(select_handler_T work_handler, void *data);
/* Wrapper to remove a lot of casts from users of bottom halves. */
#define register_bottom_half(fn, data) \
register_bottom_half_do((select_handler_T) (fn), (void *) (data))
/* Check and run scheduled work. */
void check_bottom_halves(void);
enum select_handler_type {
SELECT_HANDLER_READ,
SELECT_HANDLER_WRITE,
SELECT_HANDLER_ERROR,
};
/* Get a registered select handler. */
select_handler_T get_handler(int fd, enum select_handler_type type);
void *get_handler_data(int fd);
/* Set handlers and callback @data for the @fd descriptor. */
void set_handlers(int fd,
select_handler_T read_handler,
select_handler_T write_handler,
select_handler_T error_handler,
void *data);
/* Clear handlers associated with @fd. */
#define clear_handlers(fd) \
set_handlers(fd, NULL, NULL, NULL, NULL)
/* Checks which can be used for querying the read/write state of the @fd
* descriptor without blocking. The interlink code are the only users. */
int can_read(int fd);
int can_write(int fd);
void terminate_select(void);
const char *get_libevent_version(void);
#ifdef __cplusplus
}
#endif
#endif