/* evlist/evlist.h
 *
 * File/timed event list system.
 *
 * Copyright (C) 2003, 2004
 * Andy Goth     <unununium@openverse.com>
 *
 * This code is available under the GNU General Public License; see COPYING. */

#ifndef SEEN_EVLIST_EVLIST_H
#define SEEN_EVLIST_EVLIST_H

#include <fcntl.h>
#include <sys/poll.h>
#include <sys/time.h>

#include "prjlibs/vec.h"

typedef unsigned char byte_t;
typedef struct pollfd pollfd_t;
typedef struct timeval timeval_t;
typedef int (*schedcb_t)(void*);

struct sched ; typedef struct sched  sched_t ;
struct evlist; typedef struct evlist evlist_t;
struct device; typedef struct device device_t;

struct sched {
    timeval_t time;
    schedcb_t func;
    void*     arg ;
    unsigned int id;
};

struct evlist {
    VEC_T(device_t*) devices  ;
    VEC_T(pollfd_t ) pollfds  ;
    VEC_T(sched_t  ) scheds   ;
    unsigned int     sched_id ;
    int              loop_exit;
};

struct device {
    char* name;
    char* path;

    int   buf_cursor;
    int   buf_size;
    VEC_T(byte_t) buf_in;
    VEC_T(byte_t) buf_out;

    evlist_t* evlist;

    pollfd_t* pollfd_in;
    pollfd_t* pollfd_out;

    void* hw_state;
    int (*hw_cleanup )(device_t*);
    int (*hw_open    )(device_t*);
    int (*hw_close   )(device_t*);
    int (*hw_readable)(device_t*);
    int (*hw_writable)(device_t*);

    void* sw_state;
    int (*sw_cleanup )(device_t*);
    int (*sw_open    )(device_t*);
    int (*sw_close   )(device_t*);
    int (*sw_incoming)(device_t*);
    int (*sw_outgoing)(device_t*);
};

extern int evlist_init       (evlist_t* el);
extern int evlist_cleanup    (evlist_t* el);
extern int evlist_device_add (evlist_t* el, device_t* dev);
extern int evlist_device_del (evlist_t* el, device_t* dev);
extern int evlist_sched_add  (evlist_t* el, int time, schedcb_t func, void* arg,
                              unsigned int* id);
extern int evlist_sched_del  (evlist_t* el, unsigned int id);
extern int evlist_loop       (evlist_t* el);
extern int evlist_loop_next  (evlist_t* el, int timeout);
extern int evlist_loop_exit  (evlist_t* el);

extern int device_init       (device_t* dev, char* name);
extern int device_cleanup    (device_t* dev);
extern int device_attach_fd  (device_t* dev, int fd, int mode);
extern int device_detatch_fd (device_t* dev, int mode);
extern int device_readable   (device_t* dev);
extern int device_writable   (device_t* dev);
extern int device_sendf      (device_t* dev, char* fmt, ...);

extern int child_init  (device_t* dev, char* cmd, char** envp, int mode);
extern int fd_init     (device_t* dev, char* path, int fd_in, int fd_out);
extern int null_init   (device_t* dev);
extern int serial_init (device_t* dev, char* path, int data_bits, int stop_bits,
                int parity, int baud_rate, int sw_flow_ctrl, int hw_flow_ctrl);

#endif

/* vim: set ts=4 sts=4 sw=4 tw=80 et: */