Linux ip-172-26-7-228 5.4.0-1103-aws #111~18.04.1-Ubuntu SMP Tue May 23 20:04:10 UTC 2023 x86_64
Your IP : 18.191.171.136
#ifndef SRC_STREAM_BASE_INL_H_
#define SRC_STREAM_BASE_INL_H_
#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#include "allocated_buffer-inl.h"
#include "async_wrap-inl.h"
#include "base_object-inl.h"
#include "node.h"
#include "stream_base.h"
#include "v8.h"
namespace node {
StreamReq::StreamReq(
StreamBase* stream,
v8::Local<v8::Object> req_wrap_obj) : stream_(stream) {
AttachToObject(req_wrap_obj);
}
void StreamReq::AttachToObject(v8::Local<v8::Object> req_wrap_obj) {
CHECK_EQ(req_wrap_obj->GetAlignedPointerFromInternalField(
StreamReq::kStreamReqField),
nullptr);
req_wrap_obj->SetAlignedPointerInInternalField(
StreamReq::kStreamReqField, this);
}
StreamReq* StreamReq::FromObject(v8::Local<v8::Object> req_wrap_obj) {
return static_cast<StreamReq*>(
req_wrap_obj->GetAlignedPointerFromInternalField(
StreamReq::kStreamReqField));
}
void StreamReq::Dispose() {
BaseObjectPtr<AsyncWrap> destroy_me{GetAsyncWrap()};
object()->SetAlignedPointerInInternalField(
StreamReq::kStreamReqField, nullptr);
destroy_me->Detach();
}
v8::Local<v8::Object> StreamReq::object() {
return GetAsyncWrap()->object();
}
ShutdownWrap::ShutdownWrap(
StreamBase* stream,
v8::Local<v8::Object> req_wrap_obj)
: StreamReq(stream, req_wrap_obj) { }
WriteWrap::WriteWrap(
StreamBase* stream,
v8::Local<v8::Object> req_wrap_obj)
: StreamReq(stream, req_wrap_obj) { }
void StreamListener::PassReadErrorToPreviousListener(ssize_t nread) {
CHECK_NOT_NULL(previous_listener_);
previous_listener_->OnStreamRead(nread, uv_buf_init(nullptr, 0));
}
void StreamResource::PushStreamListener(StreamListener* listener) {
CHECK_NOT_NULL(listener);
CHECK_NULL(listener->stream_);
listener->previous_listener_ = listener_;
listener->stream_ = this;
listener_ = listener;
}
void StreamResource::RemoveStreamListener(StreamListener* listener) {
CHECK_NOT_NULL(listener);
StreamListener* previous;
StreamListener* current;
// Remove from the linked list.
for (current = listener_, previous = nullptr;
/* No loop condition because we want a crash if listener is not found */
; previous = current, current = current->previous_listener_) {
CHECK_NOT_NULL(current);
if (current == listener) {
if (previous != nullptr)
previous->previous_listener_ = current->previous_listener_;
else
listener_ = listener->previous_listener_;
break;
}
}
listener->stream_ = nullptr;
listener->previous_listener_ = nullptr;
}
uv_buf_t StreamResource::EmitAlloc(size_t suggested_size) {
DebugSealHandleScope seal_handle_scope;
return listener_->OnStreamAlloc(suggested_size);
}
void StreamResource::EmitRead(ssize_t nread, const uv_buf_t& buf) {
DebugSealHandleScope seal_handle_scope;
if (nread > 0)
bytes_read_ += static_cast<uint64_t>(nread);
listener_->OnStreamRead(nread, buf);
}
void StreamResource::EmitAfterWrite(WriteWrap* w, int status) {
DebugSealHandleScope seal_handle_scope;
listener_->OnStreamAfterWrite(w, status);
}
void StreamResource::EmitAfterShutdown(ShutdownWrap* w, int status) {
DebugSealHandleScope seal_handle_scope;
listener_->OnStreamAfterShutdown(w, status);
}
void StreamResource::EmitWantsWrite(size_t suggested_size) {
DebugSealHandleScope seal_handle_scope;
listener_->OnStreamWantsWrite(suggested_size);
}
StreamBase::StreamBase(Environment* env) : env_(env) {
PushStreamListener(&default_listener_);
}
int StreamBase::Shutdown(v8::Local<v8::Object> req_wrap_obj) {
Environment* env = stream_env();
v8::HandleScope handle_scope(env->isolate());
if (req_wrap_obj.IsEmpty()) {
if (!env->shutdown_wrap_template()
->NewInstance(env->context())
.ToLocal(&req_wrap_obj)) {
return UV_EBUSY;
}
StreamReq::ResetObject(req_wrap_obj);
}
BaseObjectPtr<AsyncWrap> req_wrap_ptr;
AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(GetAsyncWrap());
ShutdownWrap* req_wrap = CreateShutdownWrap(req_wrap_obj);
if (req_wrap != nullptr)
req_wrap_ptr.reset(req_wrap->GetAsyncWrap());
int err = DoShutdown(req_wrap);
if (err != 0 && req_wrap != nullptr) {
req_wrap->Dispose();
}
const char* msg = Error();
if (msg != nullptr) {
req_wrap_obj->Set(
env->context(),
env->error_string(), OneByteString(env->isolate(), msg)).Check();
ClearError();
}
return err;
}
StreamWriteResult StreamBase::Write(
uv_buf_t* bufs,
size_t count,
uv_stream_t* send_handle,
v8::Local<v8::Object> req_wrap_obj) {
Environment* env = stream_env();
int err;
size_t total_bytes = 0;
for (size_t i = 0; i < count; ++i)
total_bytes += bufs[i].len;
bytes_written_ += total_bytes;
if (send_handle == nullptr) {
err = DoTryWrite(&bufs, &count);
if (err != 0 || count == 0) {
return StreamWriteResult { false, err, nullptr, total_bytes, {} };
}
}
v8::HandleScope handle_scope(env->isolate());
if (req_wrap_obj.IsEmpty()) {
if (!env->write_wrap_template()
->NewInstance(env->context())
.ToLocal(&req_wrap_obj)) {
return StreamWriteResult { false, UV_EBUSY, nullptr, 0, {} };
}
StreamReq::ResetObject(req_wrap_obj);
}
AsyncHooks::DefaultTriggerAsyncIdScope trigger_scope(GetAsyncWrap());
WriteWrap* req_wrap = CreateWriteWrap(req_wrap_obj);
BaseObjectPtr<AsyncWrap> req_wrap_ptr(req_wrap->GetAsyncWrap());
err = DoWrite(req_wrap, bufs, count, send_handle);
bool async = err == 0;
if (!async) {
req_wrap->Dispose();
req_wrap = nullptr;
}
const char* msg = Error();
if (msg != nullptr) {
req_wrap_obj->Set(env->context(),
env->error_string(),
OneByteString(env->isolate(), msg)).Check();
ClearError();
}
return StreamWriteResult {
async, err, req_wrap, total_bytes, std::move(req_wrap_ptr) };
}
template <typename OtherBase>
SimpleShutdownWrap<OtherBase>::SimpleShutdownWrap(
StreamBase* stream,
v8::Local<v8::Object> req_wrap_obj)
: ShutdownWrap(stream, req_wrap_obj),
OtherBase(stream->stream_env(),
req_wrap_obj,
AsyncWrap::PROVIDER_SHUTDOWNWRAP) {
}
template <typename OtherBase>
SimpleWriteWrap<OtherBase>::SimpleWriteWrap(
StreamBase* stream,
v8::Local<v8::Object> req_wrap_obj)
: WriteWrap(stream, req_wrap_obj),
OtherBase(stream->stream_env(),
req_wrap_obj,
AsyncWrap::PROVIDER_WRITEWRAP) {
}
void StreamBase::AttachToObject(v8::Local<v8::Object> obj) {
obj->SetAlignedPointerInInternalField(
StreamBase::kStreamBaseField, this);
}
StreamBase* StreamBase::FromObject(v8::Local<v8::Object> obj) {
if (obj->GetAlignedPointerFromInternalField(StreamBase::kSlot) == nullptr)
return nullptr;
return static_cast<StreamBase*>(
obj->GetAlignedPointerFromInternalField(
StreamBase::kStreamBaseField));
}
WriteWrap* WriteWrap::FromObject(v8::Local<v8::Object> req_wrap_obj) {
return static_cast<WriteWrap*>(StreamReq::FromObject(req_wrap_obj));
}
template <typename T, bool kIsWeak>
WriteWrap* WriteWrap::FromObject(
const BaseObjectPtrImpl<T, kIsWeak>& base_obj) {
if (!base_obj) return nullptr;
return FromObject(base_obj->object());
}
ShutdownWrap* ShutdownWrap::FromObject(v8::Local<v8::Object> req_wrap_obj) {
return static_cast<ShutdownWrap*>(StreamReq::FromObject(req_wrap_obj));
}
template <typename T, bool kIsWeak>
ShutdownWrap* ShutdownWrap::FromObject(
const BaseObjectPtrImpl<T, kIsWeak>& base_obj) {
if (!base_obj) return nullptr;
return FromObject(base_obj->object());
}
void WriteWrap::SetAllocatedStorage(AllocatedBuffer&& storage) {
CHECK_NULL(storage_.data());
storage_ = std::move(storage);
}
void StreamReq::Done(int status, const char* error_str) {
AsyncWrap* async_wrap = GetAsyncWrap();
Environment* env = async_wrap->env();
if (error_str != nullptr) {
v8::HandleScope handle_scope(env->isolate());
async_wrap->object()->Set(env->context(),
env->error_string(),
OneByteString(env->isolate(), error_str))
.Check();
}
OnDone(status);
}
void StreamReq::ResetObject(v8::Local<v8::Object> obj) {
DCHECK_GT(obj->InternalFieldCount(), StreamReq::kStreamReqField);
obj->SetAlignedPointerInInternalField(StreamReq::kSlot, nullptr);
obj->SetAlignedPointerInInternalField(StreamReq::kStreamReqField, nullptr);
}
} // namespace node
#endif // defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS
#endif // SRC_STREAM_BASE_INL_H_
|