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/* ``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.
*
* The Initial Developer of the Original Code is Ericsson Utvecklings AB.
* Portions created by Ericsson are Copyright 1999, Ericsson Utvecklings
* AB. All Rights Reserved.''
*
* $Id$
*/
/*
* Author: Rickard Green
*
* Description: Tests that port I/O queues can be flushed via:
* - ready_input(),
* - ready_output(),
* - timeout(),
* - driver_async() -> read_async(), and
* - event()
*/
#ifndef UNIX
#if !defined(__WIN32__)
#define UNIX 1
#endif
#endif
#if defined(DEBUG) || 0
# define PRINTF(X) printf X
#else
# define PRINTF(X)
#endif
#if defined(UNIX)
#include <stdio.h>
#include <string.h>
#elif defined(__WIN32__)
#include <windows.h>
#endif
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#include <errno.h>
#include "erl_driver.h"
#define PEEK_NONXQ_TEST 0
#define PEEK_NONXQ_WAIT 1
typedef struct {
ErlDrvTermData caller;
ErlDrvPort port;
int cmd;
} PeekNonXQDrvData;
typedef struct {
ErlDrvPort port;
ErlDrvPDL pdl;
} AsyncData;
static ErlDrvData start(ErlDrvPort, char *);
static void stop(ErlDrvData);
static ErlDrvSSizeT control(ErlDrvData, unsigned int,
char *, ErlDrvSizeT, char **, ErlDrvSizeT);
static void ready_async(ErlDrvData, ErlDrvThreadData);
static void async_test(void *);
static void async_wait(void *);
static void async_free(void *);
static void do_sleep(unsigned);
static ErlDrvEntry peek_non_existing_queue_drv_entry = {
NULL /* init */,
start,
stop,
NULL /* output */,
NULL /* ready_input */,
NULL /* ready_output */,
"peek_non_existing_queue_drv",
NULL /* finish */,
NULL /* handle */,
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 /* process_exit */
};
DRIVER_INIT(peek_non_existing_queue_drv)
{
return &peek_non_existing_queue_drv_entry;
}
static ErlDrvData
start(ErlDrvPort port, char *command)
{
PeekNonXQDrvData *dp = driver_alloc(sizeof(PeekNonXQDrvData));
if (!dp) {
errno = ENOMEM;
return ERL_DRV_ERROR_ERRNO;
}
dp->port = port;
return (ErlDrvData) dp;
}
static void stop(ErlDrvData drv_data)
{
driver_free(drv_data);
}
static ErlDrvSSizeT control(ErlDrvData drv_data,
unsigned int command,
char *buf, ErlDrvSizeT len,
char **rbuf, ErlDrvSizeT rlen)
{
PeekNonXQDrvData *dp = (PeekNonXQDrvData *) drv_data;
unsigned int key = 0;
char *res_str = "ok";
ErlDrvSysInfo si;
driver_system_info(&si, sizeof(ErlDrvSysInfo));
if (si.async_threads == 0) {
res_str = "skipped: No async-threads available";
goto done;
}
dp->cmd = command;
dp->caller = driver_caller(dp->port);
switch (command) {
case PEEK_NONXQ_TEST: {
AsyncData *adp = driver_alloc(sizeof(AsyncData));
if (!adp) {
res_str = "enomem";
goto done;
}
driver_enq(dp->port, "!", 1);
adp->port = dp->port;
adp->pdl = driver_pdl_create(dp->port);
(void) driver_async(dp->port, &key, async_test, adp, async_free);
break;
}
case PEEK_NONXQ_WAIT:
(void) driver_async(dp->port, &key, async_wait, NULL, NULL);
break;
}
done: {
ErlDrvSSizeT res_len = strlen(res_str);
if (res_len > rlen) {
char *abuf = driver_alloc(sizeof(char)*res_len);
if (!abuf)
return 0;
*rbuf = abuf;
}
memcpy((void *) *rbuf, (void *) res_str, res_len);
return res_len;
}
}
static void ready_async(ErlDrvData drv_data, ErlDrvThreadData thread_data)
{
PeekNonXQDrvData *dp = (PeekNonXQDrvData *) drv_data;
if (dp->cmd == PEEK_NONXQ_WAIT) {
ErlDrvTermData port_id = driver_mk_port(dp->port);
ErlDrvTermData spec[] = {
ERL_DRV_PORT, port_id,
ERL_DRV_ATOM, driver_mk_atom("test_successful"),
ERL_DRV_TUPLE, 2
};
erl_drv_send_term(port_id,
dp->caller,
spec,
sizeof(spec) / sizeof(spec[0]));
}
if (thread_data)
driver_free(thread_data);
}
static void async_test(void *vadp)
{
SysIOVec *vec;
int vlen = 4711;
AsyncData *adp = (AsyncData *)vadp;
do_sleep(1);
driver_pdl_lock(adp->pdl);
vec = driver_peekq(adp->port, &vlen);
if (vlen >= 0 || vec)
abort(); /* A crude way to fail the test, but what the ... */
vlen = driver_sizeq(adp->port);
if (vlen >= 0)
abort(); /* ... */
driver_pdl_unlock(adp->pdl);
}
static void async_wait(void *vadp)
{
/* Will always be executed after async_test in the same thread */
}
static void async_free(void *vadp)
{
driver_free(vadp);
}
static void
do_sleep(unsigned secs)
{
#ifdef __WIN32__
Sleep((DWORD) secs*1000);
#else
sleep(secs);
#endif
}
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