aboutsummaryrefslogtreecommitdiffstats
path: root/erts/emulator/test/nif_SUITE_data/nif_mod.c
blob: f7e729e2b6266a789a4a2355452c9a4b4c1cc0d0 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
/*
 * %CopyrightBegin%
 *
 * Copyright Ericsson AB 2009-2014. 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 <string.h>
#include <stdio.h>

#include "nif_mod.h"

#define CHECK(X) ((void)((X) || (check_abort(__LINE__),1)))
#ifdef __GNUC__
static void check_abort(unsigned line) __attribute__((noreturn));
#endif
static void check_abort(unsigned line)
{
    enif_fprintf(stderr, "Test CHECK failed at %s:%u\r\n",
	    __FILE__, line);
    abort();
}

static int static_cntA; /* zero by default */
static int static_cntB = NIF_LIB_VER * 100;

static ERL_NIF_TERM am_true;
static ERL_NIF_TERM am_null;
static ERL_NIF_TERM am_resource_type;
static ERL_NIF_TERM am_resource_dtor_A;
static ERL_NIF_TERM am_resource_dtor_B;
static ERL_NIF_TERM am_return;

static NifModPrivData* priv_data(ErlNifEnv* env)
{
    return (NifModPrivData*) enif_priv_data(env);
}

static void init(ErlNifEnv* env)
{
    am_true = enif_make_atom(env, "true");
    am_null = enif_make_atom(env, "null");
    am_resource_type = enif_make_atom(env, "resource_type");
    am_resource_dtor_A = enif_make_atom(env, "resource_dtor_A");
    am_resource_dtor_B = enif_make_atom(env, "resource_dtor_B");
    am_return = enif_make_atom(env, "return");
}

static void add_call_with_arg(ErlNifEnv* env, NifModPrivData* data, const char* func_name,
			      const char* arg, int arg_sz)
{
    CallInfo* call = (CallInfo*)enif_alloc(sizeof(CallInfo)+strlen(func_name) + arg_sz);
    strcpy(call->func_name, func_name);
    call->lib_ver = NIF_LIB_VER;
    call->static_cntA = ++static_cntA;
    call->static_cntB = ++static_cntB;
    call->arg_sz = arg_sz;
    if (arg != NULL) {
	call->arg = call->func_name + strlen(func_name) + 1;
	memcpy(call->arg, arg, arg_sz);
    }
    else {
	call->arg = NULL;
    }
    enif_mutex_lock(data->mtx);
    call->next = data->call_history;
    data->call_history = call;
    enif_mutex_unlock(data->mtx);
}

static void add_call(ErlNifEnv* env, NifModPrivData* data,const char* func_name)
{
    add_call_with_arg(env, data, func_name, NULL, 0);
}

#define ADD_CALL(FUNC_NAME) add_call(env, priv_data(env),FUNC_NAME)

#define STRINGIFY_(X) #X
#define STRINGIFY(X) STRINGIFY_(X)

static void resource_dtor_A(ErlNifEnv* env, void* a)
{
    const char dtor_name[] = "resource_dtor_A_v"  STRINGIFY(NIF_LIB_VER); 

    add_call_with_arg(env, priv_data(env), dtor_name, (const char*)a,
		      enif_sizeof_resource(a));
}

static void resource_dtor_B(ErlNifEnv* env, void* a)
{
    const char dtor_name[] = "resource_dtor_B_v"  STRINGIFY(NIF_LIB_VER);

    add_call_with_arg(env, priv_data(env), dtor_name, (const char*)a,
		      enif_sizeof_resource(a));
}

/* {resource_type, Ix|null, ErlNifResourceFlags in, "TypeName", dtor(A|B|null), ErlNifResourceFlags out}*/
static void open_resource_type(ErlNifEnv* env, const ERL_NIF_TERM* arr)
{
    NifModPrivData* data = priv_data(env);
    char rt_name[30];
    union { ErlNifResourceFlags e; int i; } flags, exp_res, got_res;
    unsigned ix;
    ErlNifResourceDtor* dtor;
    ErlNifResourceType* got_ptr;

    CHECK(enif_is_identical(arr[0], am_resource_type));
    CHECK(enif_get_int(env, arr[2], &flags.i));
    CHECK(enif_get_string(env, arr[3], rt_name, sizeof(rt_name), ERL_NIF_LATIN1) > 0);
    CHECK(enif_get_int(env, arr[5], &exp_res.i));
	
    if (enif_is_identical(arr[4], am_null)) {
	dtor = NULL;
    }
    else if (enif_is_identical(arr[4], am_resource_dtor_A)) {
	dtor = resource_dtor_A;
    }
    else {
	CHECK(enif_is_identical(arr[4], am_resource_dtor_B));
	dtor = resource_dtor_B;
    }

    got_ptr = enif_open_resource_type(env, NULL, rt_name, dtor,
				      flags.e, &got_res.e);

    if (enif_get_uint(env, arr[1], &ix) && ix < RT_MAX && got_ptr != NULL) {
	data->rt_arr[ix] = got_ptr;
    }
    else {
	CHECK(enif_is_identical(arr[1], am_null));
	CHECK(got_ptr == NULL);
    }
    CHECK(got_res.e == exp_res.e);
}

static void do_load_info(ErlNifEnv* env, ERL_NIF_TERM load_info, int* retvalp)
{
    NifModPrivData* data = priv_data(env);
    ERL_NIF_TERM head, tail;
    unsigned ix;

    for (ix=0; ix<RT_MAX; ix++) {
	data->rt_arr[ix] = NULL;
    }
    for (head = load_info; enif_get_list_cell(env, head, &head, &tail);
	  head = tail) {
	const ERL_NIF_TERM* arr;
	int arity;

	CHECK(enif_get_tuple(env, head, &arity, &arr));
	switch (arity) {
	case 6:
	    open_resource_type(env, arr);
	    break;
	case 2:
	    CHECK(arr[0] == am_return);
	    CHECK(enif_get_int(env, arr[1], retvalp));
	    break;
	default:
	    CHECK(0);
	}
    }    
    CHECK(enif_is_empty_list(env, head));
}

static int load(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info)
{
    NifModPrivData* data;
    int retval = 0;

    init(env);
    data = (NifModPrivData*) enif_alloc(sizeof(NifModPrivData));
    CHECK(data != NULL);
    *priv = data;
    data->mtx = enif_mutex_create("nif_mod_priv_data"); 
    data->ref_cnt = 1;
    data->call_history = NULL;

    add_call(env, data, "load");

    do_load_info(env, load_info, &retval);
    if (retval)
	NifModPrivData_release(data);
    return retval;
}

static int reload(ErlNifEnv* env, void** priv, ERL_NIF_TERM load_info)
{
    NifModPrivData* data = (NifModPrivData*) *priv;
    int retval = 0;
    init(env);
    add_call(env, data, "reload");
    
    do_load_info(env, load_info, &retval);
    return retval;
}

static int upgrade(ErlNifEnv* env, void** priv, void** old_priv_data, ERL_NIF_TERM load_info)
{
    NifModPrivData* data = (NifModPrivData*) *old_priv_data;
    int retval = 0;
    init(env);
    add_call(env, data, "upgrade");
    data->ref_cnt++;

    *priv = *old_priv_data;    
    do_load_info(env, load_info, &retval);
    if (retval)
	NifModPrivData_release(data);
    return retval;
}

static void unload(ErlNifEnv* env, void* priv)
{
    NifModPrivData* data = (NifModPrivData*) priv;

    add_call(env, data, "unload");
    NifModPrivData_release(data);
}

static ERL_NIF_TERM lib_version(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
    ADD_CALL("lib_version");
    return enif_make_int(env, NIF_LIB_VER);
}

static ERL_NIF_TERM get_priv_data_ptr(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
    ADD_CALL("get_priv_data_ptr");
    return enif_make_uint64(env, (ErlNifUInt64)priv_data(env));
}

static ERL_NIF_TERM make_new_resource(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
    NifModPrivData* data = priv_data(env);
    ErlNifBinary ibin;
    char* a;
    ERL_NIF_TERM ret;
    unsigned ix;
    if (!enif_get_uint(env, argv[0], &ix) || ix >= RT_MAX 
	|| !enif_inspect_binary(env, argv[1], &ibin)) {
	return enif_make_badarg(env);
    }
    a = (char*) enif_alloc_resource(data->rt_arr[ix], ibin.size);
    memcpy(a, ibin.data, ibin.size);
    ret = enif_make_resource(env, a);
    enif_release_resource(a);
    return ret;
}

static ERL_NIF_TERM get_resource(ErlNifEnv* env, int argc, const ERL_NIF_TERM argv[])
{
    NifModPrivData* data = priv_data(env);
    ErlNifBinary obin;
    unsigned ix;
    void* a;
    if (!enif_get_uint(env, argv[0], &ix) || ix >= RT_MAX 
	|| !enif_get_resource(env, argv[1], data->rt_arr[ix], &a)
	|| !enif_alloc_binary(enif_sizeof_resource(a), &obin)) { 
	return enif_make_badarg(env);
    }
    memcpy(obin.data, a, obin.size);
    return enif_make_binary(env, &obin);
}

static ErlNifFunc nif_funcs[] =
{
    {"lib_version", 0, lib_version},
    {"get_priv_data_ptr", 0, get_priv_data_ptr},
    {"make_new_resource", 2, make_new_resource},
    {"get_resource", 2, get_resource}
};

#if NIF_LIB_VER != 3
ERL_NIF_INIT(nif_mod,nif_funcs,load,reload,upgrade,unload)
#else
ERL_NIF_INIT_GLOB /* avoid link error on windows */
#endif