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
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2009-2016. All Rights Reserved.
*
* 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.
*
* %CopyrightEnd%
*/
#ifdef __WIN32__
#include <windows.h>
#else
#include <sys/select.h>
#endif
#include <errno.h>
#include <stdio.h>
#include "erl_driver.h"
#define get_int32(s) ((((unsigned char*) (s))[0] << 24) | \
(((unsigned char*) (s))[1] << 16) | \
(((unsigned char*) (s))[2] << 8) | \
(((unsigned char*) (s))[3]))
#define ERTS_TEST_SCHEDULING_DRV_NAME "scheduling_drv"
#define ERTS_TEST_SCHEDULING_DRV_FLAGS \
ERL_DRV_FLAG_USE_PORT_LOCKING | ERL_DRV_FLAG_SOFT_BUSY
ErlDrvData start(ErlDrvPort port, char *command);
void output(ErlDrvData drv_data, char *buf, ErlDrvSizeT len);
ErlDrvSSizeT control(ErlDrvData drv_data, unsigned int command, char *buf,
ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen);
void stop(ErlDrvData drv_data);
void timeout(ErlDrvData drv_data);
static void delay(unsigned ms);
static ErlDrvEntry busy_drv_entry = {
NULL /* init */,
start,
stop,
output,
NULL /* ready_input */,
NULL /* ready_output */,
ERTS_TEST_SCHEDULING_DRV_NAME,
NULL /* finish */,
NULL /* handle */,
control,
timeout,
NULL /* outputv */,
NULL /* ready_async */,
NULL /* flush */,
NULL /* call */,
NULL /* event */,
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
ERTS_TEST_SCHEDULING_DRV_FLAGS,
NULL /* handle2 */,
NULL /* handle_monitor */,
NULL /* stop_select */
};
#define DBG(data,FMT)
/* #define DBG(data,FMT) printf("0x%.8lx: %s",driver_caller(data->port),FMT); */
typedef struct SchedDrvData {
ErlDrvPort port;
char data[255];
int curr;
int use_auto_busy;
} SchedDrvData;
DRIVER_INIT(busy_drv)
{
return &busy_drv_entry;
}
ErlDrvData start(ErlDrvPort port, char *command)
{
SchedDrvData *d = driver_alloc(sizeof(SchedDrvData));
d->port = port;
d->curr = 0;
d->use_auto_busy = 0;
DBG(d,"start\r\n");
return (ErlDrvData) d;
}
void stop(ErlDrvData drv_data) {
SchedDrvData *d = (SchedDrvData*)drv_data;
driver_output(d->port,d->data,d->curr);
DBG(d,"close\r\n");
driver_free(d);
return;
}
void timeout(ErlDrvData drv_data) {
SchedDrvData *d = (SchedDrvData*)drv_data;
set_busy_port(d->port, 0);
DBG(d,"timeout\r\n");
}
void output(ErlDrvData drv_data, char *buf, ErlDrvSizeT len)
{
int res;
unsigned int command = *buf;
SchedDrvData *d = (SchedDrvData*)drv_data;
switch (command) {
case 'B': /* busy */
DBG(d,"busy: ");
set_busy_port(d->port, 1);
break;
case 'L': /* busy long call */
DBG(d,"long: ");
delay(buf[5]*100);
set_busy_port(d->port, 1);
break;
case 'D': /* delay call */
DBG(d,"delay: ");
delay(buf[5]*100);
break;
case 'N': /* not busy */
DBG(d,"not");
set_busy_port(d->port, 0);
goto done;
case 'C': /* change state */
DBG(d,"chang: ");
break;
case 'G': /* get state */
DBG(d,"get : ");
driver_output(d->port,d->data,d->curr);
return;
default:
driver_failure_posix((ErlDrvPort) drv_data, EINVAL);
break;
}
if (len > 1) {
unsigned int val = get_int32(buf+1);
fprintf(stderr,"%u",val);
d->data[d->curr++] = val;
}
done:
fprintf(stderr,"\r\n");
}
ErlDrvSSizeT control(ErlDrvData drv_data, unsigned int command, char *buf,
ErlDrvSizeT len, char **rbuf, ErlDrvSizeT rlen)
{
switch (command) {
case 'B': /* busy */
set_busy_port((ErlDrvPort) drv_data, 1);
break;
case 'N': /* not busy */
set_busy_port((ErlDrvPort) drv_data, 0);
break;
default:
driver_failure_posix((ErlDrvPort) drv_data, EINVAL);
break;
}
return 0;
}
/*
* Delays (sleeps) the given number of milli-seconds.
*/
static void delay(unsigned ms)
{
fprintf(stderr,"delay(%u)",ms);
#ifdef __WIN32__
Sleep(ms);
#else
struct timeval t;
t.tv_sec = ms/1000;
t.tv_usec = (ms % 1000) * 1000;
select(0, NULL, NULL, NULL, &t);
#endif
}
|
