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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 AB. Portions
* created by Ericsson are Copyright 2008, Ericsson AB. All Rights
* Reserved.''
*
* $Id$
*/
#if defined(DEBUG) || 0
# define PRINTF(X) printf X
#else
# define PRINTF(X)
#endif
#include <string.h>
#include <math.h>
#ifdef __WIN32__
#include <float.h>
#if defined (__GNUC__)
int _finite(double x);
#endif
#ifndef isfinite
#define isfinite _finite
#endif
#elif !defined(HAVE_ISFINITE) && defined(HAVE_FINITE)
/* If not windows and we do not have isfinite */
#define isfinite finite
#elif !defined(HAVE_ISFINITE)
# error "No finite function found!"
#endif
#include "erl_driver.h"
#define ERTS_FP_CONTROL_TEST 0
#define ERTS_FP_THREAD_TEST 1
static ErlDrvSSizeT control(ErlDrvData, unsigned int, char *,
ErlDrvSizeT, char **, ErlDrvSizeT);
static ErlDrvEntry fp_drv_entry = {
NULL /* init */,
NULL /* start */,
NULL /* stop */,
NULL /* output */,
NULL /* ready_input */,
NULL /* ready_output */,
"fp_drv",
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,
ERL_DRV_FLAG_USE_PORT_LOCKING,
NULL /* handle2 */,
NULL /* process_exit */
};
DRIVER_INIT(fp_drv)
{
return &fp_drv_entry;
}
void *
do_test(void *unused)
{
double x, y, z;
x = 3.23e133;
y = 3.57e257;
z = x*y;
if (isfinite(z))
return "is finite (1)";
x = 5.0;
y = 0.0;
z = x/y;
if (isfinite(z))
return "is finite (2)";
z = log(-1.0);
if (isfinite(z))
return "is finite (3)";
z = log(0.0);
if (isfinite(z))
return "is finite (4)";
return "ok";
}
static ErlDrvSSizeT control(ErlDrvData drv_data,
unsigned int command,
char *buf, ErlDrvSizeT len,
char **rbuf, ErlDrvSizeT rlen)
{
char *res_str;
PRINTF(("control(%p, %d, ...) called\r\n", drv_data, command));
switch (command) {
case ERTS_FP_THREAD_TEST: {
ErlDrvTid tid;
ErlDrvSysInfo info;
driver_system_info(&info, sizeof(ErlDrvSysInfo));
if (!info.thread_support)
res_str = "skip: no thread support";
else if (0 != erl_drv_thread_create("test", &tid, do_test, NULL, NULL))
res_str = "failed to create thread";
else if (0 != erl_drv_thread_join(tid, &res_str))
res_str = "failed to join thread";
break;
}
case ERTS_FP_CONTROL_TEST:
res_str = do_test(NULL);
break;
default:
res_str = "unknown command";
break;
}
done: {
int 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;
}
}
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