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
|
#include <stdio.h>
#include "erl_driver.h"
#ifndef DRIVER_INIT
# define DRIVER_INIT(x) driver_init
#endif
static ErlDrvPort erlang_port;
static ErlDrvData easy_start(ErlDrvPort, char*);
static void easy_stop(ErlDrvData), easy_read(ErlDrvData, char*, ErlDrvSizeT);
static ErlDrvEntry easy_driver_entry =
{
NULL,
easy_start,
easy_stop,
easy_read,
NULL,
NULL,
"easy",
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
NULL,
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
0,
NULL,
NULL,
NULL
};
DRIVER_INIT(wrongname_drv)
{
erlang_port = (ErlDrvPort)-1;
return &easy_driver_entry;
}
static ErlDrvData easy_start(ErlDrvPort port,char *buf)
{
if (erlang_port != (ErlDrvPort)-1) {
return ERL_DRV_ERROR_GENERAL;
}
fprintf(stderr, "Easy driver started with args %s\n", buf);
erlang_port = port;
return (ErlDrvData)port;
}
static void easy_read(ErlDrvData port, char *buf, ErlDrvSizeT count)
{
driver_output(erlang_port, buf, count);
}
static void easy_stop(ErlDrvData port)
{
erlang_port = (ErlDrvPort)-1;
}
|
