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/*
* %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%
*/
#include <erl_nif.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <limits.h>
/* NIF interface declarations */
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info);
static int upgrade(ErlNifEnv* env, void** priv_data, void** old_priv_data, ERL_NIF_TERM load_info);
static void unload(ErlNifEnv* env, void* priv_data);
/* The NIFs: */
static ERL_NIF_TERM enabled(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ERL_NIF_TERM trace(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[]);
static ErlNifFunc nif_funcs[] = {
{"enabled", 3, enabled},
{"trace", 5, trace}
};
ERL_NIF_INIT(tracer_test, nif_funcs, load, NULL, upgrade, unload)
static ERL_NIF_TERM atom_discard;
static ERL_NIF_TERM atom_ok;
#define ASSERT(expr) assert(expr)
static int load(ErlNifEnv* env, void** priv_data, ERL_NIF_TERM load_info)
{
atom_discard = enif_make_atom(env, "discard");
atom_ok = enif_make_atom(env, "ok");
*priv_data = NULL;
return 0;
}
static void unload(ErlNifEnv* env, void* priv_data)
{
}
static int upgrade(ErlNifEnv* env, void** priv_data, void** old_priv_data,
ERL_NIF_TERM load_info)
{
if (*old_priv_data != NULL) {
return -1; /* Don't know how to do that */
}
if (*priv_data != NULL) {
return -1; /* Don't know how to do that */
}
if (load(env, priv_data, load_info)) {
return -1;
}
return 0;
}
static ERL_NIF_TERM enabled(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
int state_arity;
const ERL_NIF_TERM *state_tuple;
ERL_NIF_TERM value;
ASSERT(argc == 3);
if (!enif_get_tuple(env, argv[1], &state_arity, &state_tuple))
return atom_discard;
if (enif_get_map_value(env, state_tuple[0], argv[0], &value)) {
return value;
} else {
return atom_discard;
}
}
static ERL_NIF_TERM trace(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
int state_arity;
ErlNifPid self, to;
ERL_NIF_TERM *tuple, msg;
const ERL_NIF_TERM *state_tuple;
ASSERT(argc == 5);
enif_get_tuple(env, argv[1], &state_arity, &state_tuple);
tuple = enif_alloc(sizeof(ERL_NIF_TERM)*(argc));
memcpy(tuple,argv,sizeof(ERL_NIF_TERM)*argc);
msg = enif_make_tuple_from_array(env, tuple, argc);
enif_get_local_pid(env, state_tuple[1], &to);
enif_send(env, &to, NULL, msg);
enif_free(tuple);
return atom_ok;
}
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