summaryrefslogtreecommitdiffstats
path: root/adb/fdevent.h
blob: a0ebe2a7ee2b2372f5dc1f06bd134b4bd92703d3 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
/*
 * Copyright (C) 2006 The Android Open Source Project
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#ifndef __FDEVENT_H
#define __FDEVENT_H

#include <stdint.h>  /* for int64_t */

/* events that may be observed */
#define FDE_READ              0x0001
#define FDE_WRITE             0x0002
#define FDE_ERROR             0x0004
#define FDE_TIMEOUT           0x0008

/* features that may be set (via the events set/add/del interface) */
#define FDE_DONT_CLOSE        0x0080

typedef struct fdevent fdevent;

typedef void (*fd_func)(int fd, unsigned events, void *userdata);

/* Allocate and initialize a new fdevent object
 * Note: use FD_TIMER as 'fd' to create a fd-less object
 * (used to implement timers).
*/
fdevent *fdevent_create(int fd, fd_func func, void *arg);

/* Uninitialize and deallocate an fdevent object that was
** created by fdevent_create()
*/
void fdevent_destroy(fdevent *fde);

/* Initialize an fdevent object that was externally allocated
*/
void fdevent_install(fdevent *fde, int fd, fd_func func, void *arg);

/* Uninitialize an fdevent object that was initialized by
** fdevent_install()
*/
void fdevent_remove(fdevent *item);

/* Change which events should cause notifications
*/
void fdevent_set(fdevent *fde, unsigned events);
void fdevent_add(fdevent *fde, unsigned events);
void fdevent_del(fdevent *fde, unsigned events);

void fdevent_set_timeout(fdevent *fde, int64_t  timeout_ms);

/* loop forever, handling events.
*/
void fdevent_loop();

struct fdevent 
{
    fdevent *next;
    fdevent *prev;

    int fd;
    int force_eof;

    unsigned short state;
    unsigned short events;

    fd_func func;
    void *arg;
};


#endif