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
|
#include <stdio.h>
#include "erl_driver.h"
typedef struct _erl_drv_data {
ErlDrvPort erlang_port;
} EchoDrvData;
static EchoDrvData echo_drv_data, *echo_drv_data_p;
static EchoDrvData *echo_drv_start(ErlDrvPort port, char *command);
static void echo_drv_stop(EchoDrvData *data_p);
static void echo_drv_output(EchoDrvData *data_p, char *buf, int len);
static void echo_drv_finish(void);
static int echo_drv_control(EchoDrvData *data_p, unsigned int command,
char *buf, int len,
char **rbuf, int rlen);
static ErlDrvEntry echo_drv_entry = {
NULL, /* init */
echo_drv_start,
echo_drv_stop,
echo_drv_output,
NULL, /* ready_input */
NULL, /* ready_output */
"echo_drv",
echo_drv_finish,
NULL, /* handle */
echo_drv_control,
NULL, /* timeout */
NULL, /* outputv */
NULL /* ready_async */
};
DRIVER_INIT(echo_drv)
{
echo_drv_data_p = NULL;
return &echo_drv_entry;
}
static EchoDrvData *echo_drv_start(ErlDrvPort port, char *command)
{
if (echo_drv_data_p != NULL) {
return ERL_DRV_ERROR_GENERAL;
}
echo_drv_data_p = &echo_drv_data;
echo_drv_data_p->erlang_port = port;
return echo_drv_data_p;
}
static void echo_drv_stop(EchoDrvData *data_p) {
echo_drv_data_p = NULL;
}
static void echo_drv_output(EchoDrvData *data_p, char *buf, int len) {
driver_output(data_p->erlang_port, buf, len);
}
static void echo_drv_finish() {
echo_drv_data_p = NULL;
}
static int echo_drv_control(EchoDrvData *data_p, unsigned int command,
char *buf, int len,
char **rbuf, int rlen) {
return 0;
}
|
