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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2009. All Rights Reserved.
*
* The contents of this file are subject to the Erlang Public License,
* Version 1.1, (the "License"); you may not use this file except in
* compliance with the License. You should have received a copy of the
* Erlang Public License along with this software. If not, it can be
* retrieved online at http://www.erlang.org/.
*
* Software distributed under the License is distributed on an "AS IS"
* basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See
* the License for the specific language governing rights and limitations
* under the License.
*
* %CopyrightEnd%
*/
#include <errno.h>
#include "erl_driver.h"
ErlDrvData start(ErlDrvPort port, char *command);
void output(ErlDrvData drv_data, char *buf, int len);
int control(ErlDrvData drv_data, unsigned int command, char *buf,
int len, char **rbuf, int rlen);
static ErlDrvEntry busy_drv_entry = {
NULL /* init */,
start,
NULL /* stop */,
output,
NULL /* ready_input */,
NULL /* ready_output */,
ERTS_TEST_BUSY_DRV_NAME,
NULL /* finish */,
NULL /* handle */,
control,
NULL /* 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_BUSY_DRV_FLAGS,
NULL /* handle2 */,
NULL /* handle_monitor */,
NULL /* stop_select */
};
DRIVER_INIT(busy_drv)
{
return &busy_drv_entry;
}
ErlDrvData start(ErlDrvPort port, char *command)
{
return (ErlDrvData) port;
}
void output(ErlDrvData drv_data, char *buf, int len)
{
int res;
ErlDrvPort port = (ErlDrvPort) drv_data;
ErlDrvTermData msg[] = {
ERL_DRV_PORT, driver_mk_port(port),
ERL_DRV_ATOM, driver_mk_atom("caller"),
ERL_DRV_PID, driver_caller(port),
ERL_DRV_TUPLE, (ErlDrvTermData) 3
};
res = driver_output_term(port, msg, sizeof(msg)/sizeof(ErlDrvTermData));
if (res <= 0)
driver_failure_atom(port, "driver_output_term failed");
}
int control(ErlDrvData drv_data, unsigned int command, char *buf,
int len, char **rbuf, int 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;
}
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