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|
// Copyright Joyent, Inc. and other Node contributors.
//
// Permission is hereby granted, free of charge, to any person obtaining a
// copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to permit
// persons to whom the Software is furnished to do so, subject to the
// following conditions:
//
// The above copyright notice and this permission notice shall be included
// in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
// OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN
// NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR
// OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE
// USE OR OTHER DEALINGS IN THE SOFTWARE.
#include "async-wrap-inl.h"
#include "env-inl.h"
#include "util-inl.h"
#include "uv.h"
#include "v8.h"
#include "v8-profiler.h"
using v8::Array;
using v8::Context;
using v8::Float64Array;
using v8::Function;
using v8::FunctionCallbackInfo;
using v8::FunctionTemplate;
using v8::HandleScope;
using v8::HeapProfiler;
using v8::Integer;
using v8::Isolate;
using v8::Local;
using v8::MaybeLocal;
using v8::Number;
using v8::Object;
using v8::ObjectTemplate;
using v8::Promise;
using v8::PromiseHookType;
using v8::PropertyCallbackInfo;
using v8::RetainedObjectInfo;
using v8::String;
using v8::Symbol;
using v8::TryCatch;
using v8::Undefined;
using v8::Value;
using AsyncHooks = node::Environment::AsyncHooks;
namespace node {
static const char* const provider_names[] = {
#define V(PROVIDER) \
#PROVIDER,
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
};
// Report correct information in a heapdump.
class RetainedAsyncInfo: public RetainedObjectInfo {
public:
explicit RetainedAsyncInfo(uint16_t class_id, AsyncWrap* wrap);
void Dispose() override;
bool IsEquivalent(RetainedObjectInfo* other) override;
intptr_t GetHash() override;
const char* GetLabel() override;
intptr_t GetSizeInBytes() override;
private:
const char* label_;
const AsyncWrap* wrap_;
const int length_;
};
RetainedAsyncInfo::RetainedAsyncInfo(uint16_t class_id, AsyncWrap* wrap)
: label_(provider_names[class_id - NODE_ASYNC_ID_OFFSET]),
wrap_(wrap),
length_(wrap->self_size()) {
}
void RetainedAsyncInfo::Dispose() {
delete this;
}
bool RetainedAsyncInfo::IsEquivalent(RetainedObjectInfo* other) {
return label_ == other->GetLabel() &&
wrap_ == static_cast<RetainedAsyncInfo*>(other)->wrap_;
}
intptr_t RetainedAsyncInfo::GetHash() {
return reinterpret_cast<intptr_t>(wrap_);
}
const char* RetainedAsyncInfo::GetLabel() {
return label_;
}
intptr_t RetainedAsyncInfo::GetSizeInBytes() {
return length_;
}
RetainedObjectInfo* WrapperInfo(uint16_t class_id, Local<Value> wrapper) {
// No class_id should be the provider type of NONE.
CHECK_GT(class_id, NODE_ASYNC_ID_OFFSET);
// And make sure the class_id doesn't extend past the last provider.
CHECK_LE(class_id - NODE_ASYNC_ID_OFFSET, AsyncWrap::PROVIDERS_LENGTH);
CHECK(wrapper->IsObject());
CHECK(!wrapper.IsEmpty());
Local<Object> object = wrapper.As<Object>();
CHECK_GT(object->InternalFieldCount(), 0);
AsyncWrap* wrap = Unwrap<AsyncWrap>(object);
CHECK_NE(nullptr, wrap);
return new RetainedAsyncInfo(class_id, wrap);
}
// end RetainedAsyncInfo
static void DestroyAsyncIdsCallback(uv_timer_t* handle) {
Environment* env = Environment::from_destroy_async_ids_timer_handle(handle);
HandleScope handle_scope(env->isolate());
Context::Scope context_scope(env->context());
Local<Function> fn = env->async_hooks_destroy_function();
TryCatch try_catch(env->isolate());
do {
std::vector<double> destroy_async_id_list;
destroy_async_id_list.swap(*env->destroy_async_id_list());
for (auto async_id : destroy_async_id_list) {
// Want each callback to be cleaned up after itself, instead of cleaning
// them all up after the while() loop completes.
HandleScope scope(env->isolate());
Local<Value> async_id_value = Number::New(env->isolate(), async_id);
MaybeLocal<Value> ret = fn->Call(
env->context(), Undefined(env->isolate()), 1, &async_id_value);
if (ret.IsEmpty()) {
ClearFatalExceptionHandlers(env);
FatalException(env->isolate(), try_catch);
UNREACHABLE();
}
}
} while (!env->destroy_async_id_list()->empty());
}
static void PushBackDestroyAsyncId(Environment* env, double id) {
if (env->async_hooks()->fields()[AsyncHooks::kDestroy] == 0)
return;
if (env->destroy_async_id_list()->empty())
uv_timer_start(env->destroy_async_ids_timer_handle(),
DestroyAsyncIdsCallback, 0, 0);
env->destroy_async_id_list()->push_back(id);
}
void AsyncWrap::EmitPromiseResolve(Environment* env, double async_id) {
AsyncHooks* async_hooks = env->async_hooks();
if (async_hooks->fields()[AsyncHooks::kPromiseResolve] == 0)
return;
Local<Value> async_id_value = Number::New(env->isolate(), async_id);
Local<Function> fn = env->async_hooks_promise_resolve_function();
TryCatch try_catch(env->isolate());
MaybeLocal<Value> ar = fn->Call(
env->context(), Undefined(env->isolate()), 1, &async_id_value);
if (ar.IsEmpty()) {
ClearFatalExceptionHandlers(env);
FatalException(env->isolate(), try_catch);
UNREACHABLE();
}
}
void AsyncWrap::EmitBefore(Environment* env, double async_id) {
AsyncHooks* async_hooks = env->async_hooks();
if (async_hooks->fields()[AsyncHooks::kBefore] == 0)
return;
Local<Value> async_id_value = Number::New(env->isolate(), async_id);
Local<Function> fn = env->async_hooks_before_function();
TryCatch try_catch(env->isolate());
MaybeLocal<Value> ar = fn->Call(
env->context(), Undefined(env->isolate()), 1, &async_id_value);
if (ar.IsEmpty()) {
ClearFatalExceptionHandlers(env);
FatalException(env->isolate(), try_catch);
UNREACHABLE();
}
}
void AsyncWrap::EmitAfter(Environment* env, double async_id) {
AsyncHooks* async_hooks = env->async_hooks();
if (async_hooks->fields()[AsyncHooks::kAfter] == 0)
return;
// If the user's callback failed then the after() hooks will be called at the
// end of _fatalException().
Local<Value> async_id_value = Number::New(env->isolate(), async_id);
Local<Function> fn = env->async_hooks_after_function();
TryCatch try_catch(env->isolate());
MaybeLocal<Value> ar = fn->Call(
env->context(), Undefined(env->isolate()), 1, &async_id_value);
if (ar.IsEmpty()) {
ClearFatalExceptionHandlers(env);
FatalException(env->isolate(), try_catch);
UNREACHABLE();
}
}
class PromiseWrap : public AsyncWrap {
public:
PromiseWrap(Environment* env, Local<Object> object, bool silent)
: AsyncWrap(env, object, silent) {
MakeWeak(this);
}
size_t self_size() const override { return sizeof(*this); }
static constexpr int kPromiseField = 1;
static constexpr int kParentAsyncIdField = 2;
static constexpr int kInternalFieldCount = 3;
static PromiseWrap* New(Environment* env,
Local<Promise> promise,
PromiseWrap* parent_wrap,
bool silent);
static void GetPromise(Local<String> property,
const PropertyCallbackInfo<Value>& info);
static void getParentAsyncId(Local<String> property,
const PropertyCallbackInfo<Value>& info);
};
PromiseWrap* PromiseWrap::New(Environment* env,
Local<Promise> promise,
PromiseWrap* parent_wrap,
bool silent) {
Local<Object> object = env->promise_wrap_template()
->NewInstance(env->context()).ToLocalChecked();
object->SetInternalField(PromiseWrap::kPromiseField, promise);
if (parent_wrap != nullptr) {
object->SetInternalField(PromiseWrap::kParentAsyncIdField,
Number::New(env->isolate(),
parent_wrap->get_async_id()));
}
CHECK_EQ(promise->GetAlignedPointerFromInternalField(0), nullptr);
promise->SetInternalField(0, object);
return new PromiseWrap(env, object, silent);
}
void PromiseWrap::GetPromise(Local<String> property,
const PropertyCallbackInfo<Value>& info) {
info.GetReturnValue().Set(info.Holder()->GetInternalField(kPromiseField));
}
void PromiseWrap::getParentAsyncId(Local<String> property,
const PropertyCallbackInfo<Value>& info) {
info.GetReturnValue().Set(
info.Holder()->GetInternalField(kParentAsyncIdField));
}
static void PromiseHook(PromiseHookType type, Local<Promise> promise,
Local<Value> parent, void* arg) {
Environment* env = static_cast<Environment*>(arg);
Local<Value> resource_object_value = promise->GetInternalField(0);
PromiseWrap* wrap = nullptr;
if (resource_object_value->IsObject()) {
Local<Object> resource_object = resource_object_value.As<Object>();
wrap = Unwrap<PromiseWrap>(resource_object);
}
if (type == PromiseHookType::kInit || wrap == nullptr) {
bool silent = type != PromiseHookType::kInit;
PromiseWrap* parent_wrap = nullptr;
// set parent promise's async Id as this promise's triggerAsyncId
if (parent->IsPromise()) {
// parent promise exists, current promise
// is a chained promise, so we set parent promise's id as
// current promise's triggerAsyncId
Local<Promise> parent_promise = parent.As<Promise>();
Local<Value> parent_resource = parent_promise->GetInternalField(0);
if (parent_resource->IsObject()) {
parent_wrap = Unwrap<PromiseWrap>(parent_resource.As<Object>());
}
if (parent_wrap == nullptr) {
parent_wrap = PromiseWrap::New(env, parent_promise, nullptr, true);
}
// get id from parentWrap
double trigger_async_id = parent_wrap->get_async_id();
env->set_init_trigger_async_id(trigger_async_id);
}
wrap = PromiseWrap::New(env, promise, parent_wrap, silent);
}
CHECK_NE(wrap, nullptr);
if (type == PromiseHookType::kBefore) {
env->async_hooks()->push_async_ids(
wrap->get_async_id(), wrap->get_trigger_async_id());
AsyncWrap::EmitBefore(wrap->env(), wrap->get_async_id());
} else if (type == PromiseHookType::kAfter) {
AsyncWrap::EmitAfter(wrap->env(), wrap->get_async_id());
if (env->execution_async_id() == wrap->get_async_id()) {
// This condition might not be true if async_hooks was enabled during
// the promise callback execution.
// Popping it off the stack can be skipped in that case, because is is
// known that it would correspond to exactly one call with
// PromiseHookType::kBefore that was not witnessed by the PromiseHook.
env->async_hooks()->pop_async_id(wrap->get_async_id());
}
} else if (type == PromiseHookType::kResolve) {
AsyncWrap::EmitPromiseResolve(wrap->env(), wrap->get_async_id());
}
}
static void SetupHooks(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
if (!args[0]->IsObject())
return env->ThrowTypeError("first argument must be an object");
// All of init, before, after, destroy are supplied by async_hooks
// internally, so this should every only be called once. At which time all
// the functions should be set. Detect this by checking if init !IsEmpty().
CHECK(env->async_hooks_init_function().IsEmpty());
Local<Object> fn_obj = args[0].As<Object>();
#define SET_HOOK_FN(name) \
Local<Value> name##_v = fn_obj->Get( \
env->context(), \
FIXED_ONE_BYTE_STRING(env->isolate(), #name)).ToLocalChecked(); \
CHECK(name##_v->IsFunction()); \
env->set_async_hooks_##name##_function(name##_v.As<Function>());
SET_HOOK_FN(init);
SET_HOOK_FN(before);
SET_HOOK_FN(after);
SET_HOOK_FN(destroy);
SET_HOOK_FN(promise_resolve);
#undef SET_HOOK_FN
{
Local<FunctionTemplate> ctor =
FunctionTemplate::New(env->isolate());
ctor->SetClassName(FIXED_ONE_BYTE_STRING(env->isolate(), "PromiseWrap"));
Local<ObjectTemplate> promise_wrap_template = ctor->InstanceTemplate();
promise_wrap_template->SetInternalFieldCount(
PromiseWrap::kInternalFieldCount);
promise_wrap_template->SetAccessor(
FIXED_ONE_BYTE_STRING(env->isolate(), "promise"),
PromiseWrap::GetPromise);
promise_wrap_template->SetAccessor(
FIXED_ONE_BYTE_STRING(env->isolate(), "parentId"),
PromiseWrap::getParentAsyncId);
env->set_promise_wrap_template(promise_wrap_template);
}
}
static void EnablePromiseHook(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->AddPromiseHook(PromiseHook, static_cast<void*>(env));
}
static void DisablePromiseHook(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
// Delay the call to `RemovePromiseHook` because we might currently be
// between the `before` and `after` calls of a Promise.
env->isolate()->EnqueueMicrotask([](void* data) {
Environment* env = static_cast<Environment*>(data);
env->RemovePromiseHook(PromiseHook, data);
}, static_cast<void*>(env));
}
void AsyncWrap::GetAsyncId(const FunctionCallbackInfo<Value>& args) {
AsyncWrap* wrap;
args.GetReturnValue().Set(-1);
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
args.GetReturnValue().Set(wrap->get_async_id());
}
void AsyncWrap::PushAsyncIds(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
// No need for CHECK(IsNumber()) on args because if FromJust() doesn't fail
// then the checks in push_async_ids() and pop_async_id() will.
double async_id = args[0]->NumberValue(env->context()).FromJust();
double trigger_async_id = args[1]->NumberValue(env->context()).FromJust();
env->async_hooks()->push_async_ids(async_id, trigger_async_id);
}
void AsyncWrap::PopAsyncIds(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
double async_id = args[0]->NumberValue(env->context()).FromJust();
args.GetReturnValue().Set(env->async_hooks()->pop_async_id(async_id));
}
void AsyncWrap::AsyncIdStackSize(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
args.GetReturnValue().Set(
static_cast<double>(env->async_hooks()->stack_size()));
}
void AsyncWrap::ClearAsyncIdStack(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
env->async_hooks()->clear_async_id_stack();
}
void AsyncWrap::AsyncReset(const FunctionCallbackInfo<Value>& args) {
AsyncWrap* wrap;
ASSIGN_OR_RETURN_UNWRAP(&wrap, args.Holder());
double execution_async_id = args[0]->IsNumber() ? args[0]->NumberValue() : -1;
wrap->AsyncReset(execution_async_id);
}
void AsyncWrap::QueueDestroyAsyncId(const FunctionCallbackInfo<Value>& args) {
CHECK(args[0]->IsNumber());
PushBackDestroyAsyncId(Environment::GetCurrent(args), args[0]->NumberValue());
}
void AsyncWrap::AddWrapMethods(Environment* env,
Local<FunctionTemplate> constructor,
int flag) {
env->SetProtoMethod(constructor, "getAsyncId", AsyncWrap::GetAsyncId);
if (flag & kFlagHasReset)
env->SetProtoMethod(constructor, "asyncReset", AsyncWrap::AsyncReset);
}
void AsyncWrap::Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context) {
Environment* env = Environment::GetCurrent(context);
Isolate* isolate = env->isolate();
HandleScope scope(isolate);
env->SetMethod(target, "setupHooks", SetupHooks);
env->SetMethod(target, "pushAsyncIds", PushAsyncIds);
env->SetMethod(target, "popAsyncIds", PopAsyncIds);
env->SetMethod(target, "asyncIdStackSize", AsyncIdStackSize);
env->SetMethod(target, "clearAsyncIdStack", ClearAsyncIdStack);
env->SetMethod(target, "queueDestroyAsyncId", QueueDestroyAsyncId);
env->SetMethod(target, "enablePromiseHook", EnablePromiseHook);
env->SetMethod(target, "disablePromiseHook", DisablePromiseHook);
v8::PropertyAttribute ReadOnlyDontDelete =
static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete);
#define FORCE_SET_TARGET_FIELD(obj, str, field) \
(obj)->DefineOwnProperty(context, \
FIXED_ONE_BYTE_STRING(isolate, str), \
field, \
ReadOnlyDontDelete).FromJust()
// Attach the uint32_t[] where each slot contains the count of the number of
// callbacks waiting to be called on a particular event. It can then be
// incremented/decremented from JS quickly to communicate to C++ if there are
// any callbacks waiting to be called.
FORCE_SET_TARGET_FIELD(target,
"async_hook_fields",
env->async_hooks()->fields().GetJSArray());
// The following v8::Float64Array has 5 fields. These fields are shared in
// this way to allow JS and C++ to read/write each value as quickly as
// possible. The fields are represented as follows:
//
// kAsyncUid: Maintains the state of the next unique id to be assigned.
//
// kInitTriggerAsyncId: Write the id of the resource responsible for a
// handle's creation just before calling the new handle's constructor.
// After the new handle is constructed kInitTriggerAsyncId is set back to 0.
FORCE_SET_TARGET_FIELD(target,
"async_id_fields",
env->async_hooks()->async_id_fields().GetJSArray());
Local<Object> constants = Object::New(isolate);
#define SET_HOOKS_CONSTANT(name) \
FORCE_SET_TARGET_FIELD( \
constants, #name, Integer::New(isolate, AsyncHooks::name));
SET_HOOKS_CONSTANT(kInit);
SET_HOOKS_CONSTANT(kBefore);
SET_HOOKS_CONSTANT(kAfter);
SET_HOOKS_CONSTANT(kDestroy);
SET_HOOKS_CONSTANT(kPromiseResolve);
SET_HOOKS_CONSTANT(kTotals);
SET_HOOKS_CONSTANT(kCheck);
SET_HOOKS_CONSTANT(kExecutionAsyncId);
SET_HOOKS_CONSTANT(kTriggerAsyncId);
SET_HOOKS_CONSTANT(kAsyncIdCounter);
SET_HOOKS_CONSTANT(kInitTriggerAsyncId);
#undef SET_HOOKS_CONSTANT
FORCE_SET_TARGET_FIELD(target, "constants", constants);
Local<Object> async_providers = Object::New(isolate);
#define V(p) \
FORCE_SET_TARGET_FIELD( \
async_providers, #p, Integer::New(isolate, AsyncWrap::PROVIDER_ ## p));
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
FORCE_SET_TARGET_FIELD(target, "Providers", async_providers);
// These Symbols are used throughout node so the stored values on each object
// can be accessed easily across files.
FORCE_SET_TARGET_FIELD(
target,
"async_id_symbol",
Symbol::New(isolate, FIXED_ONE_BYTE_STRING(isolate, "asyncId")));
FORCE_SET_TARGET_FIELD(
target,
"trigger_async_id_symbol",
Symbol::New(isolate, FIXED_ONE_BYTE_STRING(isolate, "triggerAsyncId")));
#undef FORCE_SET_TARGET_FIELD
env->set_async_hooks_init_function(Local<Function>());
env->set_async_hooks_before_function(Local<Function>());
env->set_async_hooks_after_function(Local<Function>());
env->set_async_hooks_destroy_function(Local<Function>());
env->set_async_hooks_promise_resolve_function(Local<Function>());
}
void LoadAsyncWrapperInfo(Environment* env) {
HeapProfiler* heap_profiler = env->isolate()->GetHeapProfiler();
#define V(PROVIDER) \
heap_profiler->SetWrapperClassInfoProvider( \
(NODE_ASYNC_ID_OFFSET + AsyncWrap::PROVIDER_ ## PROVIDER), WrapperInfo);
NODE_ASYNC_PROVIDER_TYPES(V)
#undef V
}
AsyncWrap::AsyncWrap(Environment* env,
Local<Object> object,
ProviderType provider,
double execution_async_id)
: BaseObject(env, object),
provider_type_(provider) {
CHECK_NE(provider, PROVIDER_NONE);
CHECK_GE(object->InternalFieldCount(), 1);
// Shift provider value over to prevent id collision.
persistent().SetWrapperClassId(NODE_ASYNC_ID_OFFSET + provider);
// Use AsyncReset() call to execute the init() callbacks.
AsyncReset(execution_async_id);
}
// This is specifically used by the PromiseWrap constructor.
AsyncWrap::AsyncWrap(Environment* env,
Local<Object> object,
bool silent)
: BaseObject(env, object),
provider_type_(PROVIDER_PROMISE) {
CHECK_GE(object->InternalFieldCount(), 1);
// Shift provider value over to prevent id collision.
persistent().SetWrapperClassId(NODE_ASYNC_ID_OFFSET + provider_type_);
// Use AsyncReset() call to execute the init() callbacks.
AsyncReset(-1, silent);
}
AsyncWrap::~AsyncWrap() {
PushBackDestroyAsyncId(env(), get_async_id());
}
// Generalized call for both the constructor and for handles that are pooled
// and reused over their lifetime. This way a new uid can be assigned when
// the resource is pulled out of the pool and put back into use.
void AsyncWrap::AsyncReset(double execution_async_id, bool silent) {
async_id_ =
execution_async_id == -1 ? env()->new_async_id() : execution_async_id;
trigger_async_id_ = env()->get_init_trigger_async_id();
if (silent) return;
EmitAsyncInit(env(), object(),
env()->async_hooks()->provider_string(provider_type()),
async_id_, trigger_async_id_);
}
void AsyncWrap::EmitAsyncInit(Environment* env,
Local<Object> object,
Local<String> type,
double async_id,
double trigger_async_id) {
CHECK(!object.IsEmpty());
CHECK(!type.IsEmpty());
AsyncHooks* async_hooks = env->async_hooks();
// Nothing to execute, so can continue normally.
if (async_hooks->fields()[AsyncHooks::kInit] == 0) {
return;
}
HandleScope scope(env->isolate());
Local<Function> init_fn = env->async_hooks_init_function();
Local<Value> argv[] = {
Number::New(env->isolate(), async_id),
type,
Number::New(env->isolate(), trigger_async_id),
object,
};
TryCatch try_catch(env->isolate());
MaybeLocal<Value> ret = init_fn->Call(
env->context(), object, arraysize(argv), argv);
if (ret.IsEmpty()) {
ClearFatalExceptionHandlers(env);
FatalException(env->isolate(), try_catch);
}
}
MaybeLocal<Value> AsyncWrap::MakeCallback(const Local<Function> cb,
int argc,
Local<Value>* argv) {
async_context context { get_async_id(), get_trigger_async_id() };
return InternalMakeCallback(env(), object(), cb, argc, argv, context);
}
/* Public C++ embedder API */
async_id AsyncHooksGetExecutionAsyncId(Isolate* isolate) {
return Environment::GetCurrent(isolate)->execution_async_id();
}
async_id AsyncHooksGetTriggerAsyncId(Isolate* isolate) {
return Environment::GetCurrent(isolate)->trigger_async_id();
}
async_context EmitAsyncInit(Isolate* isolate,
Local<Object> resource,
const char* name,
async_id trigger_async_id) {
Local<String> type =
String::NewFromUtf8(isolate, name, v8::NewStringType::kInternalized)
.ToLocalChecked();
return EmitAsyncInit(isolate, resource, type, trigger_async_id);
}
async_context EmitAsyncInit(Isolate* isolate,
Local<Object> resource,
v8::Local<v8::String> name,
async_id trigger_async_id) {
Environment* env = Environment::GetCurrent(isolate);
// Initialize async context struct
if (trigger_async_id == -1)
trigger_async_id = env->get_init_trigger_async_id();
async_context context = {
env->new_async_id(), // async_id_
trigger_async_id // trigger_async_id_
};
// Run init hooks
AsyncWrap::EmitAsyncInit(env, resource, name, context.async_id,
context.trigger_async_id);
return context;
}
void EmitAsyncDestroy(Isolate* isolate, async_context asyncContext) {
PushBackDestroyAsyncId(Environment::GetCurrent(isolate),
asyncContext.async_id);
}
} // namespace node
NODE_BUILTIN_MODULE_CONTEXT_AWARE(async_wrap, node::AsyncWrap::Initialize)
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