forked from nodejs/node
-
Notifications
You must be signed in to change notification settings - Fork 0
Expand file tree
/
Copy pathnode_api.cc
More file actions
1308 lines (1088 loc) · 39.6 KB
/
node_api.cc
File metadata and controls
1308 lines (1088 loc) · 39.6 KB
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
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
#include "async_wrap-inl.h"
#include "env-inl.h"
#define NAPI_EXPERIMENTAL
#include "js_native_api_v8.h"
#include "memory_tracker-inl.h"
#include "node_api.h"
#include "node_api_internals.h"
#include "node_binding.h"
#include "node_buffer.h"
#include "node_errors.h"
#include "node_internals.h"
#include "threadpoolwork-inl.h"
#include "tracing/traced_value.h"
#include "util-inl.h"
#include <atomic>
#include <memory>
node_napi_env__::node_napi_env__(v8::Local<v8::Context> context,
const std::string& module_filename)
: napi_env__(context), filename(module_filename) {
CHECK_NOT_NULL(node_env());
}
bool node_napi_env__::can_call_into_js() const {
return node_env()->can_call_into_js();
}
v8::Maybe<bool> node_napi_env__::mark_arraybuffer_as_untransferable(
v8::Local<v8::ArrayBuffer> ab) const {
return ab->SetPrivate(context(),
node_env()->untransferable_object_private_symbol(),
v8::True(isolate));
}
void node_napi_env__::CallFinalizer(napi_finalize cb, void* data, void* hint) {
// we need to keep the env live until the finalizer has been run
// EnvRefHolder provides an exception safe wrapper to Ref and then
// Unref once the lamba is freed
EnvRefHolder liveEnv(static_cast<napi_env>(this));
node_env()->SetImmediate(
[=, liveEnv = std::move(liveEnv)](node::Environment* node_env) {
napi_env env = liveEnv.env();
v8::HandleScope handle_scope(env->isolate);
v8::Context::Scope context_scope(env->context());
env->CallIntoModule([&](napi_env env) { cb(env, data, hint); });
});
}
namespace v8impl {
namespace {
class BufferFinalizer : private Finalizer {
public:
// node::Buffer::FreeCallback
static void FinalizeBufferCallback(char* data, void* hint) {
std::unique_ptr<BufferFinalizer, Deleter> finalizer{
static_cast<BufferFinalizer*>(hint)};
finalizer->_finalize_data = data;
node::Environment* node_env =
static_cast<node_napi_env>(finalizer->_env)->node_env();
node_env->SetImmediate(
[finalizer = std::move(finalizer)](node::Environment* env) {
if (finalizer->_finalize_callback == nullptr) return;
v8::HandleScope handle_scope(finalizer->_env->isolate);
v8::Context::Scope context_scope(finalizer->_env->context());
finalizer->_env->CallIntoModule([&](napi_env env) {
finalizer->_finalize_callback(
env,
finalizer->_finalize_data,
finalizer->_finalize_hint);
});
});
}
struct Deleter {
void operator()(BufferFinalizer* finalizer) {
Finalizer::Delete(finalizer);
}
};
};
static inline napi_env
NewEnv(v8::Local<v8::Context> context, const std::string& module_filename) {
node_napi_env result;
result = new node_napi_env__(context, module_filename);
// TODO(addaleax): There was previously code that tried to delete the
// napi_env when its v8::Context was garbage collected;
// However, as long as N-API addons using this napi_env are in place,
// the Context needs to be accessible and alive.
// Ideally, we'd want an on-addon-unload hook that takes care of this
// once all N-API addons using this napi_env are unloaded.
// For now, a per-Environment cleanup hook is the best we can do.
result->node_env()->AddCleanupHook(
[](void* arg) {
static_cast<napi_env>(arg)->Unref();
},
static_cast<void*>(result));
return result;
}
static inline void trigger_fatal_exception(
napi_env env, v8::Local<v8::Value> local_err) {
v8::Local<v8::Message> local_msg =
v8::Exception::CreateMessage(env->isolate, local_err);
node::errors::TriggerUncaughtException(env->isolate, local_err, local_msg);
}
class ThreadSafeFunction : public node::AsyncResource {
public:
ThreadSafeFunction(v8::Local<v8::Function> func,
v8::Local<v8::Object> resource,
v8::Local<v8::String> name,
size_t thread_count_,
void* context_,
size_t max_queue_size_,
node_napi_env env_,
void* finalize_data_,
napi_finalize finalize_cb_,
napi_threadsafe_function_call_js call_js_cb_):
AsyncResource(env_->isolate,
resource,
*v8::String::Utf8Value(env_->isolate, name)),
thread_count(thread_count_),
is_closing(false),
dispatch_state(kDispatchIdle),
context(context_),
max_queue_size(max_queue_size_),
env(env_),
finalize_data(finalize_data_),
finalize_cb(finalize_cb_),
call_js_cb(call_js_cb_ == nullptr ? CallJs : call_js_cb_),
handles_closing(false) {
ref.Reset(env->isolate, func);
node::AddEnvironmentCleanupHook(env->isolate, Cleanup, this);
env->Ref();
}
~ThreadSafeFunction() override {
node::RemoveEnvironmentCleanupHook(env->isolate, Cleanup, this);
env->Unref();
}
// These methods can be called from any thread.
napi_status Push(void* data, napi_threadsafe_function_call_mode mode) {
node::Mutex::ScopedLock lock(this->mutex);
while (queue.size() >= max_queue_size &&
max_queue_size > 0 &&
!is_closing) {
if (mode == napi_tsfn_nonblocking) {
return napi_queue_full;
}
cond->Wait(lock);
}
if (is_closing) {
if (thread_count == 0) {
return napi_invalid_arg;
} else {
thread_count--;
return napi_closing;
}
} else {
queue.push(data);
Send();
return napi_ok;
}
}
napi_status Acquire() {
node::Mutex::ScopedLock lock(this->mutex);
if (is_closing) {
return napi_closing;
}
thread_count++;
return napi_ok;
}
napi_status Release(napi_threadsafe_function_release_mode mode) {
node::Mutex::ScopedLock lock(this->mutex);
if (thread_count == 0) {
return napi_invalid_arg;
}
thread_count--;
if (thread_count == 0 || mode == napi_tsfn_abort) {
if (!is_closing) {
is_closing = (mode == napi_tsfn_abort);
if (is_closing && max_queue_size > 0) {
cond->Signal(lock);
}
Send();
}
}
return napi_ok;
}
void EmptyQueueAndDelete() {
for (; !queue.empty() ; queue.pop()) {
call_js_cb(nullptr, nullptr, context, queue.front());
}
delete this;
}
// These methods must only be called from the loop thread.
napi_status Init() {
ThreadSafeFunction* ts_fn = this;
uv_loop_t* loop = env->node_env()->event_loop();
if (uv_async_init(loop, &async, AsyncCb) == 0) {
if (max_queue_size > 0) {
cond = std::make_unique<node::ConditionVariable>();
}
if (max_queue_size == 0 || cond) {
return napi_ok;
}
env->node_env()->CloseHandle(
reinterpret_cast<uv_handle_t*>(&async),
[](uv_handle_t* handle) -> void {
ThreadSafeFunction* ts_fn =
node::ContainerOf(&ThreadSafeFunction::async,
reinterpret_cast<uv_async_t*>(handle));
delete ts_fn;
});
// Prevent the thread-safe function from being deleted here, because
// the callback above will delete it.
ts_fn = nullptr;
}
delete ts_fn;
return napi_generic_failure;
}
napi_status Unref() {
uv_unref(reinterpret_cast<uv_handle_t*>(&async));
return napi_ok;
}
napi_status Ref() {
uv_ref(reinterpret_cast<uv_handle_t*>(&async));
return napi_ok;
}
inline void* Context() {
return context;
}
protected:
void Dispatch() {
bool has_more = true;
// Limit maximum synchronous iteration count to prevent event loop
// starvation. See `src/node_messaging.cc` for an inspiration.
unsigned int iterations_left = kMaxIterationCount;
while (has_more && --iterations_left != 0) {
dispatch_state = kDispatchRunning;
has_more = DispatchOne();
// Send() was called while we were executing the JS function
if (dispatch_state.exchange(kDispatchIdle) != kDispatchRunning) {
has_more = true;
}
}
if (has_more) {
Send();
}
}
bool DispatchOne() {
void* data = nullptr;
bool popped_value = false;
bool has_more = false;
{
node::Mutex::ScopedLock lock(this->mutex);
if (is_closing) {
CloseHandlesAndMaybeDelete();
} else {
size_t size = queue.size();
if (size > 0) {
data = queue.front();
queue.pop();
popped_value = true;
if (size == max_queue_size && max_queue_size > 0) {
cond->Signal(lock);
}
size--;
}
if (size == 0) {
if (thread_count == 0) {
is_closing = true;
if (max_queue_size > 0) {
cond->Signal(lock);
}
CloseHandlesAndMaybeDelete();
}
} else {
has_more = true;
}
}
}
if (popped_value) {
v8::HandleScope scope(env->isolate);
CallbackScope cb_scope(this);
napi_value js_callback = nullptr;
if (!ref.IsEmpty()) {
v8::Local<v8::Function> js_cb =
v8::Local<v8::Function>::New(env->isolate, ref);
js_callback = v8impl::JsValueFromV8LocalValue(js_cb);
}
env->CallIntoModule([&](napi_env env) {
call_js_cb(env, js_callback, context, data);
});
}
return has_more;
}
void Finalize() {
v8::HandleScope scope(env->isolate);
if (finalize_cb) {
CallbackScope cb_scope(this);
env->CallIntoModule([&](napi_env env) {
finalize_cb(env, finalize_data, context);
});
}
EmptyQueueAndDelete();
}
void CloseHandlesAndMaybeDelete(bool set_closing = false) {
v8::HandleScope scope(env->isolate);
if (set_closing) {
node::Mutex::ScopedLock lock(this->mutex);
is_closing = true;
if (max_queue_size > 0) {
cond->Signal(lock);
}
}
if (handles_closing) {
return;
}
handles_closing = true;
env->node_env()->CloseHandle(
reinterpret_cast<uv_handle_t*>(&async),
[](uv_handle_t* handle) -> void {
ThreadSafeFunction* ts_fn =
node::ContainerOf(&ThreadSafeFunction::async,
reinterpret_cast<uv_async_t*>(handle));
ts_fn->Finalize();
});
}
void Send() {
// Ask currently running Dispatch() to make one more iteration
unsigned char current_state = dispatch_state.fetch_or(kDispatchPending);
if ((current_state & kDispatchRunning) == kDispatchRunning) {
return;
}
CHECK_EQ(0, uv_async_send(&async));
}
// Default way of calling into JavaScript. Used when ThreadSafeFunction is
// without a call_js_cb_.
static void CallJs(napi_env env, napi_value cb, void* context, void* data) {
if (!(env == nullptr || cb == nullptr)) {
napi_value recv;
napi_status status;
status = napi_get_undefined(env, &recv);
if (status != napi_ok) {
napi_throw_error(env, "ERR_NAPI_TSFN_GET_UNDEFINED",
"Failed to retrieve undefined value");
return;
}
status = napi_call_function(env, recv, cb, 0, nullptr, nullptr);
if (status != napi_ok && status != napi_pending_exception) {
napi_throw_error(env, "ERR_NAPI_TSFN_CALL_JS",
"Failed to call JS callback");
return;
}
}
}
static void AsyncCb(uv_async_t* async) {
ThreadSafeFunction* ts_fn =
node::ContainerOf(&ThreadSafeFunction::async, async);
ts_fn->Dispatch();
}
static void Cleanup(void* data) {
reinterpret_cast<ThreadSafeFunction*>(data)
->CloseHandlesAndMaybeDelete(true);
}
private:
static const unsigned char kDispatchIdle = 0;
static const unsigned char kDispatchRunning = 1 << 0;
static const unsigned char kDispatchPending = 1 << 1;
static const unsigned int kMaxIterationCount = 1000;
// These are variables protected by the mutex.
node::Mutex mutex;
std::unique_ptr<node::ConditionVariable> cond;
std::queue<void*> queue;
uv_async_t async;
size_t thread_count;
bool is_closing;
std::atomic_uchar dispatch_state;
// These are variables set once, upon creation, and then never again, which
// means we don't need the mutex to read them.
void* context;
size_t max_queue_size;
// These are variables accessed only from the loop thread.
v8impl::Persistent<v8::Function> ref;
node_napi_env env;
void* finalize_data;
napi_finalize finalize_cb;
napi_threadsafe_function_call_js call_js_cb;
bool handles_closing;
};
/**
* Compared to node::AsyncResource, the resource object in AsyncContext is
* gc-able. AsyncContext holds a weak reference to the resource object.
* AsyncContext::MakeCallback doesn't implicitly set the receiver of the
* callback to the resource object.
*/
class AsyncContext {
public:
AsyncContext(node_napi_env env,
v8::Local<v8::Object> resource_object,
const v8::Local<v8::String> resource_name,
bool externally_managed_resource)
: env_(env) {
async_id_ = node_env()->new_async_id();
trigger_async_id_ = node_env()->get_default_trigger_async_id();
resource_.Reset(node_env()->isolate(), resource_object);
lost_reference_ = false;
if (externally_managed_resource) {
resource_.SetWeak(
this, AsyncContext::WeakCallback, v8::WeakCallbackType::kParameter);
}
node::AsyncWrap::EmitAsyncInit(node_env(),
resource_object,
resource_name,
async_id_,
trigger_async_id_);
}
~AsyncContext() {
resource_.Reset();
lost_reference_ = true;
node::AsyncWrap::EmitDestroy(node_env(), async_id_);
}
inline v8::MaybeLocal<v8::Value> MakeCallback(
v8::Local<v8::Object> recv,
const v8::Local<v8::Function> callback,
int argc,
v8::Local<v8::Value> argv[]) {
EnsureReference();
return node::InternalMakeCallback(node_env(),
resource(),
recv,
callback,
argc,
argv,
{async_id_, trigger_async_id_});
}
inline napi_callback_scope OpenCallbackScope() {
EnsureReference();
napi_callback_scope it =
reinterpret_cast<napi_callback_scope>(new CallbackScope(this));
env_->open_callback_scopes++;
return it;
}
inline void EnsureReference() {
if (lost_reference_) {
const v8::HandleScope handle_scope(node_env()->isolate());
resource_.Reset(node_env()->isolate(),
v8::Object::New(node_env()->isolate()));
lost_reference_ = false;
}
}
inline node::Environment* node_env() { return env_->node_env(); }
inline v8::Local<v8::Object> resource() {
return resource_.Get(node_env()->isolate());
}
inline node::async_context async_context() {
return {async_id_, trigger_async_id_};
}
static inline void CloseCallbackScope(node_napi_env env,
napi_callback_scope s) {
CallbackScope* callback_scope = reinterpret_cast<CallbackScope*>(s);
delete callback_scope;
env->open_callback_scopes--;
}
static void WeakCallback(const v8::WeakCallbackInfo<AsyncContext>& data) {
AsyncContext* async_context = data.GetParameter();
async_context->resource_.Reset();
async_context->lost_reference_ = true;
}
private:
class CallbackScope : public node::CallbackScope {
public:
explicit CallbackScope(AsyncContext* async_context)
: node::CallbackScope(async_context->node_env(),
async_context->resource_.Get(
async_context->node_env()->isolate()),
async_context->async_context()) {}
};
node_napi_env env_;
double async_id_;
double trigger_async_id_;
v8::Global<v8::Object> resource_;
bool lost_reference_;
};
} // end of anonymous namespace
} // end of namespace v8impl
// Intercepts the Node-V8 module registration callback. Converts parameters
// to NAPI equivalents and then calls the registration callback specified
// by the NAPI module.
static void napi_module_register_cb(v8::Local<v8::Object> exports,
v8::Local<v8::Value> module,
v8::Local<v8::Context> context,
void* priv) {
napi_module_register_by_symbol(exports, module, context,
static_cast<const napi_module*>(priv)->nm_register_func);
}
void napi_module_register_by_symbol(v8::Local<v8::Object> exports,
v8::Local<v8::Value> module,
v8::Local<v8::Context> context,
napi_addon_register_func init) {
node::Environment* node_env = node::Environment::GetCurrent(context);
std::string module_filename = "";
if (init == nullptr) {
CHECK_NOT_NULL(node_env);
node_env->ThrowError(
"Module has no declared entry point.");
return;
}
// We set `env->filename` from `module.filename` here, but we could just as
// easily add a private property to `exports` in `process.dlopen`, which
// receives the file name from JS, and retrieve *that* here. Thus, we are not
// endorsing commonjs here by making use of `module.filename`.
v8::Local<v8::Value> filename_js;
v8::Local<v8::Object> modobj;
if (module->ToObject(context).ToLocal(&modobj) &&
modobj->Get(context, node_env->filename_string()).ToLocal(&filename_js) &&
filename_js->IsString()) {
node::Utf8Value filename(node_env->isolate(), filename_js); // Cast
// Turn the absolute path into a URL. Currently the absolute path is always
// a file system path.
// TODO(gabrielschulhof): Pass the `filename` through unchanged if/when we
// receive it as a URL already.
module_filename = std::string("file://") + (*filename);
}
// Create a new napi_env for this specific module.
napi_env env = v8impl::NewEnv(context, module_filename);
napi_value _exports;
env->CallIntoModule([&](napi_env env) {
_exports = init(env, v8impl::JsValueFromV8LocalValue(exports));
});
// If register function returned a non-null exports object different from
// the exports object we passed it, set that as the "exports" property of
// the module.
if (_exports != nullptr &&
_exports != v8impl::JsValueFromV8LocalValue(exports)) {
napi_value _module = v8impl::JsValueFromV8LocalValue(module);
napi_set_named_property(env, _module, "exports", _exports);
}
}
namespace node {
node_module napi_module_to_node_module(const napi_module* mod) {
return {
-1,
mod->nm_flags | NM_F_DELETEME,
nullptr,
mod->nm_filename,
nullptr,
napi_module_register_cb,
mod->nm_modname,
const_cast<napi_module*>(mod), // priv
nullptr,
};
}
} // namespace node
// Registers a NAPI module.
void napi_module_register(napi_module* mod) {
node::node_module* nm = new node::node_module(
node::napi_module_to_node_module(mod));
node::node_module_register(nm);
}
napi_status napi_add_env_cleanup_hook(napi_env env,
void (*fun)(void* arg),
void* arg) {
CHECK_ENV(env);
CHECK_ARG(env, fun);
node::AddEnvironmentCleanupHook(env->isolate, fun, arg);
return napi_ok;
}
napi_status napi_remove_env_cleanup_hook(napi_env env,
void (*fun)(void* arg),
void* arg) {
CHECK_ENV(env);
CHECK_ARG(env, fun);
node::RemoveEnvironmentCleanupHook(env->isolate, fun, arg);
return napi_ok;
}
struct napi_async_cleanup_hook_handle__ {
napi_async_cleanup_hook_handle__(napi_env env,
napi_async_cleanup_hook user_hook,
void* user_data):
env_(env),
user_hook_(user_hook),
user_data_(user_data) {
handle_ = node::AddEnvironmentCleanupHook(env->isolate, Hook, this);
env->Ref();
}
~napi_async_cleanup_hook_handle__() {
node::RemoveEnvironmentCleanupHook(std::move(handle_));
if (done_cb_ != nullptr)
done_cb_(done_data_);
// Release the `env` handle asynchronously since it would be surprising if
// a call to a N-API function would destroy `env` synchronously.
static_cast<node_napi_env>(env_)->node_env()
->SetImmediate([env = env_](node::Environment*) { env->Unref(); });
}
static void Hook(void* data, void (*done_cb)(void*), void* done_data) {
napi_async_cleanup_hook_handle__* handle =
static_cast<napi_async_cleanup_hook_handle__*>(data);
handle->done_cb_ = done_cb;
handle->done_data_ = done_data;
handle->user_hook_(handle, handle->user_data_);
}
node::AsyncCleanupHookHandle handle_;
napi_env env_ = nullptr;
napi_async_cleanup_hook user_hook_ = nullptr;
void* user_data_ = nullptr;
void (*done_cb_)(void*) = nullptr;
void* done_data_ = nullptr;
};
napi_status napi_add_async_cleanup_hook(
napi_env env,
napi_async_cleanup_hook hook,
void* arg,
napi_async_cleanup_hook_handle* remove_handle) {
CHECK_ENV(env);
CHECK_ARG(env, hook);
48D5
napi_async_cleanup_hook_handle__* handle =
new napi_async_cleanup_hook_handle__(env, hook, arg);
if (remove_handle != nullptr)
*remove_handle = handle;
return napi_clear_last_error(env);
}
napi_status napi_remove_async_cleanup_hook(
napi_async_cleanup_hook_handle remove_handle) {
if (remove_handle == nullptr)
return napi_invalid_arg;
delete remove_handle;
return napi_ok;
}
napi_status napi_fatal_exception(napi_env env, napi_value err) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, err);
v8::Local<v8::Value> local_err = v8impl::V8LocalValueFromJsValue(err);
v8impl::trigger_fatal_exception(env, local_err);
return napi_clear_last_error(env);
}
NAPI_NO_RETURN void napi_fatal_error(const char* location,
size_t location_len,
const char* message,
size_t message_len) {
std::string location_string;
std::string message_string;
if (location_len != NAPI_AUTO_LENGTH) {
location_string.assign(
const_cast<char*>(location), location_len);
} else {
location_string.assign(
const_cast<char*>(location), strlen(location));
}
if (message_len != NAPI_AUTO_LENGTH) {
message_string.assign(
const_cast<char*>(message), message_len);
} else {
message_string.assign(
const_cast<char*>(message), strlen(message));
}
node::FatalError(location_string.c_str(), message_string.c_str());
}
napi_status napi_open_callback_scope(napi_env env,
napi_value /** ignored */,
napi_async_context async_context_handle,
napi_callback_scope* result) {
// Omit NAPI_PREAMBLE and GET_RETURN_STATUS because V8 calls here cannot throw
// JS exceptions.
CHECK_ENV(env);
CHECK_ARG(env, result);
v8impl::AsyncContext* node_async_context =
reinterpret_cast<v8impl::AsyncContext*>(async_context_handle);
*result = node_async_context->OpenCallbackScope();
return napi_clear_last_error(env);
}
napi_status napi_close_callback_scope(napi_env env, napi_callback_scope scope) {
// Omit NAPI_PREAMBLE and GET_RETURN_STATUS because V8 calls here cannot throw
// JS exceptions.
CHECK_ENV(env);
CHECK_ARG(env, scope);
if (env->open_callback_scopes == 0) {
return napi_callback_scope_mismatch;
}
v8impl::AsyncContext::CloseCallbackScope(reinterpret_cast<node_napi_env>(env),
scope);
return napi_clear_last_error(env);
}
napi_status napi_async_init(napi_env env,
napi_value async_resource,
napi_value async_resource_name,
napi_async_context* result) {
CHECK_ENV(env);
CHECK_ARG(env, async_resource_name);
CHECK_ARG(env, result);
v8::Isolate* isolate = env->isolate;
v8::Local<v8::Context> context = env->context();
v8::Local<v8::Object> v8_resource;
bool externally_managed_resource;
if (async_resource != nullptr) {
CHECK_TO_OBJECT(env, context, v8_resource, async_resource);
externally_managed_resource = true;
} else {
v8_resource = v8::Object::New(isolate);
externally_managed_resource = false;
}
v8::Local<v8::String> v8_resource_name;
CHECK_TO_STRING(env, context, v8_resource_name, async_resource_name);
v8impl::AsyncContext* async_context =
new v8impl::AsyncContext(reinterpret_cast<node_napi_env>(env),
v8_resource,
v8_resource_name,
externally_managed_resource);
*result = reinterpret_cast<napi_async_context>(async_context);
return napi_clear_last_error(env);
}
napi_status napi_async_destroy(napi_env env,
napi_async_context async_context) {
CHECK_ENV(env);
CHECK_ARG(env, async_context);
v8impl::AsyncContext* node_async_context =
reinterpret_cast<v8impl::AsyncContext*>(async_context);
delete node_async_context;
return napi_clear_last_error(env);
}
napi_status napi_make_callback(napi_env env,
napi_async_context async_context,
napi_value recv,
napi_value func,
size_t argc,
const napi_value* argv,
napi_value* result) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, recv);
if (argc > 0) {
CHECK_ARG(env, argv);
}
v8::Local<v8::Context> context = env->context();
v8::Local<v8::Object> v8recv;
CHECK_TO_OBJECT(env, context, v8recv, recv);
v8::Local<v8::Function> v8func;
CHECK_TO_FUNCTION(env, v8func, func);
v8::MaybeLocal<v8::Value> callback_result;
if (async_context == nullptr) {
callback_result = node::MakeCallback(
env->isolate,
v8recv,
v8func,
argc,
reinterpret_cast<v8::Local<v8::Value>*>(const_cast<napi_value*>(argv)),
{0, 0});
} else {
v8impl::AsyncContext* node_async_context =
reinterpret_cast<v8impl::AsyncContext*>(async_context);
callback_result = node_async_context->MakeCallback(
v8recv,
v8func,
argc,
reinterpret_cast<v8::Local<v8::Value>*>(const_cast<napi_value*>(argv)));
}
if (try_catch.HasCaught()) {
return napi_set_last_error(env, napi_pending_exception);
} else {
CHECK_MAYBE_EMPTY(env, callback_result, napi_generic_failure);
if (result != nullptr) {
*result = v8impl::JsValueFromV8LocalValue(
callback_result.ToLocalChecked());
}
}
return GET_RETURN_STATUS(env);
}
napi_status napi_create_buffer(napi_env env,
size_t length,
void** data,
napi_value* result) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, result);
v8::MaybeLocal<v8::Object> maybe = node::Buffer::New(env->isolate, length);
CHECK_MAYBE_EMPTY(env, maybe, napi_generic_failure);
v8::Local<v8::Object> buffer = maybe.ToLocalChecked();
*result = v8impl::JsValueFromV8LocalValue(buffer);
if (data != nullptr) {
*data = node::Buffer::Data(buffer);
}
return GET_RETURN_STATUS(env);
}
napi_status napi_create_external_buffer(napi_env env,
size_t length,
void* data,
napi_finalize finalize_cb,
void* finalize_hint,
napi_value* result) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, result);
v8::Isolate* isolate = env->isolate;
// The finalizer object will delete itself after invoking the callback.
v8impl::Finalizer* finalizer = v8impl::Finalizer::New(
env, finalize_cb, nullptr, finalize_hint,
v8impl::Finalizer::kKeepEnvReference);
v8::MaybeLocal<v8::Object> maybe = node::Buffer::New(
isolate,
static_cast<char*>(data),
length,
v8impl::BufferFinalizer::FinalizeBufferCallback,
finalizer);
CHECK_MAYBE_EMPTY(env, maybe, napi_generic_failure);
*result = v8impl::JsValueFromV8LocalValue(maybe.ToLocalChecked());
return GET_RETURN_STATUS(env);
// Tell coverity that 'finalizer' should not be freed when we return
// as it will be deleted when the buffer to which it is associated
// is finalized.
// coverity[leaked_storage]
}
napi_status napi_create_buffer_copy(napi_env env,
size_t length,
const void* data,
void** result_data,
napi_value* result) {
NAPI_PREAMBLE(env);
CHECK_ARG(env, result);
v8::MaybeLocal<v8::Object> maybe = node::Buffer::Copy(
env->isolate,
static_cast<const char*>(data), length);
CHECK_MAYBE_EMPTY(env, maybe, napi_generic_failure);
v8::Local<v8::Object> buffer = maybe.ToLocalChecked();
*result = v8impl::JsValueFromV8LocalValue(buffer);
if (result_data != nullptr) {
*result_data = node::Buffer::Data(buffer);
}
return GET_RETURN_STATUS(env);
}
napi_status napi_is_buffer(napi_env env, napi_value value, bool* result) {
<
42D3
div>
CHECK_ENV(env);
CHECK_ARG(env, value);
CHECK_ARG(env, result);
*result = node::Buffer::HasInstance(v8impl::V8LocalValueFromJsValue(value));
return napi_clear_last_error(env);
}
napi_status napi_get_buffer_info(napi_env env,
napi_value value,
void** data,
size_t* length) {
CHECK_ENV(env);
CHECK_ARG(env, value);
v8::Local<v8::Value> buffer = v8impl::V8LocalValueFromJsValue(value);
if (data != nullptr) {
*data = node::Buffer::Data(buffer);
}
if (length != nullptr) {