apps/streamer/event.h

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/*
 * Copyright (C) 2004 Nathan Lutchansky <lutchann@litech.org>
 *
 *  This program is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  This program is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

#include <sys/types.h>
#include <sys/time.h>

#ifndef _EVENT_H
#define _EVENT_H

#define EVENT_TIME              1
#define EVENT_FD                2
#define EVENT_ALWAYS            3

#define EVENT_F_ENABLED         1
#define EVENT_F_REMOVE          2
#define EVENT_F_ONESHOT         4
#define EVENT_F_RUNNING         8

struct event;

typedef struct timeval  time_ref;
typedef void (*callback)( struct event *e, void *d );

struct time_event {
        time_ref fire;
        int ival;
};

struct fd_event {
        int fd;
        int write; // 0 = read, 1 = write
};

struct event {
        struct event *prev;
        struct event *next;
        callback func;
        void *data;
        int type;
        int flags;
        union {
                struct time_event time;
                struct fd_event fd;
        } ev;
};

int time_diff( time_ref *tr_start, time_ref *tr_end );
int time_ago( time_ref *tr );

void time_now( time_ref *tr );
void time_add( time_ref *tr, int msec );
void time_future( time_ref *tr, int msec );

struct event *add_timer_event( int msec, unsigned int flags, callback f, void *d );
struct event *add_alarm_event( time_ref *t, unsigned int flags, callback f, void *d );
void resched_event( struct event *e, time_ref *t );
struct event *add_fd_event( int fd, int write, unsigned int flags, callback f, void *d );
struct event *add_always_event( unsigned int flags, callback f, void *d );
void remove_event( struct event *e );
void set_event_interval( struct event *e, int msec );
void set_event_enabled( struct event *e, int enabled );
int get_event_enabled( struct event *e );
void exit_event_loop(void);
void event_loop( int single );

#endif /* EVENT_H */

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