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/*
* %CopyrightBegin%
*
* Copyright Ericsson AB 2011-2016. 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%
*/
#include "erl_driver.h"
#define NO_ASYNC_JOBS 10000
static void stop(ErlDrvData drv_data);
static ErlDrvData start(ErlDrvPort port,
char *command);
static void output(ErlDrvData drv_data,
char *buf, ErlDrvSizeT len);
static void ready_async(ErlDrvData drv_data,
ErlDrvThreadData thread_data);
static ErlDrvEntry async_blast_drv_entry = {
NULL /* init */,
start,
stop,
output,
NULL /* ready_input */,
NULL /* ready_output */,
"async_blast_drv",
NULL /* finish */,
NULL /* handle */,
NULL /* control */,
NULL /* timeout */,
NULL /* outputv */,
ready_async,
NULL /* flush */,
NULL /* call */,
NULL /* event */,
ERL_DRV_EXTENDED_MARKER,
ERL_DRV_EXTENDED_MAJOR_VERSION,
ERL_DRV_EXTENDED_MINOR_VERSION,
ERL_DRV_FLAG_USE_PORT_LOCKING,
NULL /* handle2 */,
NULL /* handle_monitor */
};
typedef struct {
ErlDrvPort port;
ErlDrvTermData port_id;
ErlDrvTermData caller;
int counter;
} async_blast_data_t;
DRIVER_INIT(async_blast_drv)
{
return &async_blast_drv_entry;
}
static void stop(ErlDrvData drv_data)
{
driver_free((void *) drv_data);
}
static ErlDrvData start(ErlDrvPort port,
char *command)
{
async_blast_data_t *abd;
abd = driver_alloc(sizeof(async_blast_data_t));
if (!abd)
return ERL_DRV_ERROR_GENERAL;
abd->port = port;
abd->port_id = driver_mk_port(port);
abd->counter = 0;
return (ErlDrvData) abd;
}
static void async_invoke(void *data)
{
}
#include <stdio.h>
static void ready_async(ErlDrvData drv_data,
ErlDrvThreadData thread_data)
{
async_blast_data_t *abd = (async_blast_data_t *) drv_data;
if (--abd->counter == 0) {
ErlDrvTermData spec[] = {
ERL_DRV_PORT, abd->port_id,
ERL_DRV_ATOM, driver_mk_atom("done"),
ERL_DRV_TUPLE, 2
};
erl_drv_send_term(abd->port_id, abd->caller,
spec, sizeof(spec)/sizeof(spec[0]));
}
}
static void output(ErlDrvData drv_data,
char *buf, ErlDrvSizeT len)
{
async_blast_data_t *abd = (async_blast_data_t *) drv_data;
if (abd->counter == 0) {
int i;
abd->caller = driver_caller(abd->port);
abd->counter = NO_ASYNC_JOBS;
for (i = 0; i < NO_ASYNC_JOBS; i++) {
if (0 > driver_async(abd->port, NULL, async_invoke, NULL, NULL)) {
driver_failure_atom(abd->port, "driver_async_failed");
break;
}
}
}
}
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