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
|
#include <stdlib.h>
#include <uv.h>
#include <node_api.h>
#include "../../js-native-api/common.h"
typedef struct {
napi_ref js_cb_ref;
napi_ref js_tsfn_finalizer_ref;
napi_threadsafe_function tsfn;
uv_thread_t thread;
} AddonData;
static void AsyncWorkCbExecute(napi_env env, void* data) {
(void) env;
(void) data;
}
static void call_cb_and_delete_ref(napi_env env, napi_ref* optional_ref) {
napi_value js_cb, undefined;
if (optional_ref == NULL) {
AddonData* data;
NODE_API_CALL_RETURN_VOID(env, napi_get_instance_data(env, (void**)&data));
optional_ref = &data->js_cb_ref;
}
NODE_API_CALL_RETURN_VOID(env,
napi_get_reference_value(env, *optional_ref, &js_cb));
NODE_API_CALL_RETURN_VOID(env, napi_get_undefined(env, &undefined));
NODE_API_CALL_RETURN_VOID(env,
napi_call_function(env, undefined, js_cb, 0, NULL, NULL));
NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, *optional_ref));
*optional_ref = NULL;
}
static void AsyncWorkCbComplete(napi_env env,
napi_status status,
void* data) {
(void) status;
(void) data;
call_cb_and_delete_ref(env, NULL);
}
static bool establish_callback_ref(napi_env env, napi_callback_info info) {
AddonData* data;
size_t argc = 1;
napi_value js_cb;
NODE_API_CALL_BASE(env, napi_get_instance_data(env, (void**)&data), false);
NODE_API_ASSERT_BASE(
env, data->js_cb_ref == NULL, "reference must be NULL", false);
NODE_API_CALL_BASE(
env, napi_get_cb_info(env, info, &argc, &js_cb, NULL, NULL), false);
NODE_API_CALL_BASE(
env, napi_create_reference(env, js_cb, 1, &data->js_cb_ref), false);
return true;
}
static napi_value AsyncWorkCallback(napi_env env, napi_callback_info info) {
if (establish_callback_ref(env, info)) {
napi_value resource_name;
napi_async_work work;
NODE_API_CALL(env,
napi_create_string_utf8(
env, "AsyncIncrement", NAPI_AUTO_LENGTH, &resource_name));
NODE_API_CALL(env,
napi_create_async_work(
env, NULL, resource_name, AsyncWorkCbExecute, AsyncWorkCbComplete,
NULL, &work));
NODE_API_CALL(env, napi_queue_async_work(env, work));
}
return NULL;
}
static void TestBufferFinalizerCallback(napi_env env, void* data, void* hint) {
(void) data;
(void) hint;
call_cb_and_delete_ref(env, NULL);
}
static napi_value TestBufferFinalizer(napi_env env, napi_callback_info info) {
napi_value buffer = NULL;
if (establish_callback_ref(env, info)) {
NODE_API_CALL(env,
napi_create_external_buffer(
env, sizeof(napi_callback), TestBufferFinalizer,
TestBufferFinalizerCallback, NULL, &buffer));
}
return buffer;
}
static void ThreadsafeFunctionCallJS(napi_env env,
napi_value tsfn_cb,
void* context,
void* data) {
(void) tsfn_cb;
(void) context;
(void) data;
call_cb_and_delete_ref(env, NULL);
}
static void ThreadsafeFunctionTestThread(void* raw_data) {
AddonData* data = raw_data;
napi_status status;
// No need to call `napi_acquire_threadsafe_function()` because the main
// thread has set the refcount to 1 and there is only this one secondary
// thread.
status = napi_call_threadsafe_function(data->tsfn,
ThreadsafeFunctionCallJS,
napi_tsfn_nonblocking);
if (status != napi_ok) {
napi_fatal_error("ThreadSafeFunctionTestThread",
NAPI_AUTO_LENGTH,
"Failed to call TSFN",
NAPI_AUTO_LENGTH);
}
status = napi_release_threadsafe_function(data->tsfn, napi_tsfn_release);
if (status != napi_ok) {
napi_fatal_error("ThreadSafeFunctionTestThread",
NAPI_AUTO_LENGTH,
"Failed to release TSFN",
NAPI_AUTO_LENGTH);
}
}
static void FinalizeThreadsafeFunction(napi_env env, void* raw, void* hint) {
AddonData* data;
NODE_API_CALL_RETURN_VOID(env, napi_get_instance_data(env, (void**)&data));
NODE_API_ASSERT_RETURN_VOID(env,
uv_thread_join(&data->thread) == 0, "Failed to join the thread");
call_cb_and_delete_ref(env, &data->js_tsfn_finalizer_ref);
data->tsfn = NULL;
}
// This function accepts two arguments: the JS callback, and the finalize
// callback. The latter moves the test forward.
static napi_value
TestThreadsafeFunction(napi_env env, napi_callback_info info) {
AddonData* data;
size_t argc = 2;
napi_value argv[2], resource_name;
NODE_API_CALL(env, napi_get_cb_info(env, info, &argc, argv, NULL, NULL));
NODE_API_CALL(env, napi_get_instance_data(env, (void**)&data));
NODE_API_ASSERT(env, data->js_cb_ref == NULL, "reference must be NULL");
NODE_API_ASSERT(
env, data->js_tsfn_finalizer_ref == NULL,
"tsfn finalizer reference must be NULL");
NODE_API_CALL(env, napi_create_reference(env, argv[0], 1, &data->js_cb_ref));
NODE_API_CALL(env,
napi_create_reference(env, argv[1], 1, &data->js_tsfn_finalizer_ref));
NODE_API_CALL(env,
napi_create_string_utf8(
env, "TSFN instance data test", NAPI_AUTO_LENGTH, &resource_name));
NODE_API_CALL(env,
napi_create_threadsafe_function(
env, NULL, NULL, resource_name, 0, 1, NULL,
FinalizeThreadsafeFunction, NULL, ThreadsafeFunctionCallJS,
&data->tsfn));
NODE_API_ASSERT(env,
uv_thread_create(&data->thread, ThreadsafeFunctionTestThread, data) == 0,
"uv_thread_create failed");
return NULL;
}
static void DeleteAddonData(napi_env env, void* raw_data, void* hint) {
AddonData* data = raw_data;
if (data->js_cb_ref) {
NODE_API_CALL_RETURN_VOID(env, napi_delete_reference(env, data->js_cb_ref));
}
if (data->js_tsfn_finalizer_ref) {
NODE_API_CALL_RETURN_VOID(env,
napi_delete_reference(env, data->js_tsfn_finalizer_ref));
}
free(data);
}
static napi_value Init(napi_env env, napi_value exports) {
AddonData* data = malloc(sizeof(*data));
data->js_cb_ref = NULL;
data->js_tsfn_finalizer_ref = NULL;
NODE_API_CALL(env, napi_set_instance_data(env, data, DeleteAddonData, NULL));
napi_property_descriptor props[] = {
DECLARE_NODE_API_PROPERTY("asyncWorkCallback", AsyncWorkCallback),
DECLARE_NODE_API_PROPERTY("testBufferFinalizer", TestBufferFinalizer),
DECLARE_NODE_API_PROPERTY("testThreadsafeFunction", TestThreadsafeFunction),
};
NODE_API_CALL(env,
napi_define_properties(
env, exports, sizeof(props) / sizeof(*props), props));
return exports;
}
NAPI_MODULE(NODE_GYP_MODULE_NAME, Init)
|
