// 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.

#ifndef SRC_NODE_H_

#define SRC_NODE_H_

#ifdef _WIN32

# ifndef BUILDING_NODE_EXTENSION

#  define NODE_EXTERN __declspec(dllexport)

# else

#  define NODE_EXTERN __declspec(dllimport)

# endif

#else

# define NODE_EXTERN __attribute__((visibility("default")))

#endif

// Declarations annotated with NODE_EXTERN_PRIVATE do not form part of

// the public API. They are implementation details that can and will

// change between releases, even in semver patch releases. Do not use

// any such symbol in external code.

#ifdef NODE_SHARED_MODE

#define NODE_EXTERN_PRIVATE NODE_EXTERN

#else

#define NODE_EXTERN_PRIVATE

#endif

#ifdef BUILDING_NODE_EXTENSION

# undef BUILDING_V8_SHARED

# undef BUILDING_UV_SHARED

# define USING_V8_SHARED 1

# define USING_UV_SHARED 1

#endif

// This should be defined in make system.

// See issue https://github.com/nodejs/node-v0.x-archive/issues/1236

#if defined(__MINGW32__) || defined(_MSC_VER)

#ifndef _WIN32_WINNT

# define _WIN32_WINNT 0x0600  // Windows Server 2008

#endif

#ifndef NOMINMAX

# define NOMINMAX

#endif

#endif

#if defined(_MSC_VER)

#define PATH_MAX MAX_PATH

#endif

#ifdef _WIN32

# define SIGKILL 9

#endif

#include "v8.h"  // NOLINT(build/include_order)

#include "v8-platform.h"  // NOLINT(build/include_order)

#include "node_version.h"  // NODE_MODULE_VERSION

#include <memory>

#include <functional>

// We cannot use __POSIX__ in this header because that's only defined when

// building Node.js.

#ifndef _WIN32

#include <signal.h>

#endif  // _WIN32

#define NODE_MAKE_VERSION(major, minor, patch)                                \

  ((major) * 0x1000 + (minor) * 0x100 + (patch))

#ifdef __clang__

# define NODE_CLANG_AT_LEAST(major, minor, patch)                             \

  (NODE_MAKE_VERSION(major, minor, patch) <=                                  \

      NODE_MAKE_VERSION(__clang_major__, __clang_minor__, __clang_patchlevel__))

#else

# define NODE_CLANG_AT_LEAST(major, minor, patch) (0)

#endif

#ifdef __GNUC__

# define NODE_GNUC_AT_LEAST(major, minor, patch)                              \

  (NODE_MAKE_VERSION(major, minor, patch) <=                                  \

      NODE_MAKE_VERSION(__GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__))

#else

# define NODE_GNUC_AT_LEAST(major, minor, patch) (0)

#endif

#if defined(NODE_WANT_INTERNALS) && NODE_WANT_INTERNALS

# define NODE_DEPRECATED(message, declarator) declarator

#else  // NODE_WANT_INTERNALS

# if NODE_CLANG_AT_LEAST(2, 9, 0) || NODE_GNUC_AT_LEAST(4, 5, 0)

#  define NODE_DEPRECATED(message, declarator)                                 \

    __attribute__((deprecated(message))) declarator

# elif defined(_MSC_VER)

#  define NODE_DEPRECATED(message, declarator)                                 \

    __declspec(deprecated) declarator

# else

#  define NODE_DEPRECATED(message, declarator) declarator

# endif

#endif

// Forward-declare libuv loop

struct uv_loop_s;

struct napi_module;

// Forward-declare these functions now to stop MSVS from becoming

// terminally confused when it's done in node_internals.h

namespace node {

namespace tracing {

class TracingController;

}

NODE_EXTERN v8::Local<v8::Value> ErrnoException(v8::Isolate* isolate,

                                                int errorno,

                                                const char* syscall = nullptr,

                                                const char* message = nullptr,

                                                const char* path = nullptr);

NODE_EXTERN v8::Local<v8::Value> UVException(v8::Isolate* isolate,

                                             int errorno,

                                             const char* syscall = nullptr,

                                             const char* message = nullptr,

                                             const char* path = nullptr,

                                             const char* dest = nullptr);

NODE_DEPRECATED("Use ErrnoException(isolate, ...)",

                inline v8::Local<v8::Value> ErrnoException(

      int errorno,

      const char* syscall = nullptr,

      const char* message = nullptr,

      const char* path = nullptr) {

  return ErrnoException(v8::Isolate::GetCurrent(),

                        errorno,

                        syscall,

                        message,

                        path);

})

NODE_DEPRECATED("Use UVException(isolate, ...)",

                inline v8::Local<v8::Value> UVException(int errorno,

                                        const char* syscall = nullptr,

                                        const char* message = nullptr,

                                        const char* path = nullptr) {

  return UVException(v8::Isolate::GetCurrent(),

                     errorno,

                     syscall,

                     message,

                     path);

})

/*

 * These methods need to be called in a HandleScope.

 *

 * It is preferred that you use the `MakeCallback` overloads taking

 * `async_context` arguments.

 */

NODE_DEPRECATED("Use MakeCallback(..., async_context)",

                NODE_EXTERN v8::Local<v8::Value> MakeCallback(

                    v8::Isolate* isolate,

                    v8::Local<v8::Object> recv,

                    const char* method,

                    int argc,

                    v8::Local<v8::Value>* argv));

NODE_DEPRECATED("Use MakeCallback(..., async_context)",

                NODE_EXTERN v8::Local<v8::Value> MakeCallback(

                    v8::Isolate* isolate,

                    v8::Local<v8::Object> recv,

                    v8::Local<v8::String> symbol,

                    int argc,

                    v8::Local<v8::Value>* argv));

NODE_DEPRECATED("Use MakeCallback(..., async_context)",

                NODE_EXTERN v8::Local<v8::Value> MakeCallback(

                    v8::Isolate* isolate,

                    v8::Local<v8::Object> recv,

                    v8::Local<v8::Function> callback,

                    int argc,

                    v8::Local<v8::Value>* argv));

}  // namespace node

#include <cassert>

#include <cstdint>

#ifndef NODE_STRINGIFY

# define NODE_STRINGIFY(n) NODE_STRINGIFY_HELPER(n)

# define NODE_STRINGIFY_HELPER(n) #n

#endif

#ifdef _WIN32

#if !defined(_SSIZE_T_) && !defined(_SSIZE_T_DEFINED)

typedef intptr_t ssize_t;

# define _SSIZE_T_

# define _SSIZE_T_DEFINED

#endif

#else  // !_WIN32

# include <sys/types.h>  // size_t, ssize_t

#endif  // _WIN32

namespace node {

class IsolateData;

class Environment;

namespace ProcessFlags {

enum Flags : uint64_t {

  kNoFlags = 0,

  // Enable stdio inheritance, which is disabled by default.

  kEnableStdioInheritance = 1 << 0,

  // Disable reading the NODE_OPTIONS environment variable.

  kDisableNodeOptionsEnv = 1 << 1,

  // Do not parse CLI options.

  kDisableCLIOptions = 1 << 2,

  // Do not initialize ICU.

  kNoICU = 1 << 3,

};

}  // namespace ProcessFlags

// TODO(addaleax): Officially deprecate this and replace it with something

// better suited for a public embedder API.

NODE_EXTERN int Start(int argc, char* argv[]);

// Tear down Node.js while it is running (there are active handles

// in the loop and / or actively executing JavaScript code).

NODE_EXTERN int Stop(Environment* env);

// Set up per-process state needed to run Node.js. This will consume arguments

// from argv, fill exec_argv, and possibly add errors resulting from parsing

// the arguments to `errors`. The return value is a suggested exit code for the

// program; If it is 0, then initializing Node.js succeeded.

NODE_EXTERN int InitializeNodeWithArgs(

    std::vector<std::string>* argv,

    std::vector<std::string>* exec_argv,

    std::vector<std::string>* errors);

// TODO(zcbenz): Turn above overloaded version into below's default argument.

NODE_EXTERN int InitializeNodeWithArgs(

    std::vector<std::string>* argv,

    std::vector<std::string>* exec_argv,

    std::vector<std::string>* errors,

    ProcessFlags::Flags flags);

enum OptionEnvvarSettings {

  kAllowedInEnvironment,

  kDisallowedInEnvironment

};

NODE_EXTERN int ProcessGlobalArgs(std::vector<std::string>* args,

                      std::vector<std::string>* exec_args,

                      std::vector<std::string>* errors,

                      OptionEnvvarSettings settings);

class NodeArrayBufferAllocator;

// An ArrayBuffer::Allocator class with some Node.js-specific tweaks. If you do

// not have to use another allocator, using this class is recommended:

// - It supports Buffer.allocUnsafe() and Buffer.allocUnsafeSlow() with

//   uninitialized memory.

// - It supports transferring, rather than copying, ArrayBuffers when using

//   MessagePorts.

class NODE_EXTERN ArrayBufferAllocator : public v8::ArrayBuffer::Allocator {

 public:

  // If `always_debug` is true, create an ArrayBuffer::Allocator instance

  // that performs additional integrity checks (e.g. make sure that only memory

  // that was allocated by the it is also freed by it).

  // This can also be set using the --debug-arraybuffer-allocations flag.

  static std::unique_ptr<ArrayBufferAllocator> Create(

      bool always_debug = false);

 private:

  virtual NodeArrayBufferAllocator* GetImpl() = 0;

  friend class IsolateData;

};

// Legacy equivalents for ArrayBufferAllocator::Create().

NODE_EXTERN ArrayBufferAllocator* CreateArrayBufferAllocator();

NODE_EXTERN void FreeArrayBufferAllocator(ArrayBufferAllocator* allocator);

class NODE_EXTERN IsolatePlatformDelegate {

 public:

  virtual std::shared_ptr<v8::TaskRunner> GetForegroundTaskRunner() = 0;

  virtual bool IdleTasksEnabled() = 0;

};

class NODE_EXTERN MultiIsolatePlatform : public v8::Platform {

 public:

  // Returns true if work was dispatched or executed. New tasks that are

  // posted during flushing of the queue are postponed until the next

  // flushing.

  virtual bool FlushForegroundTasks(v8::Isolate* isolate) = 0;

  virtual void DrainTasks(v8::Isolate* isolate) = 0;

  // This needs to be called between the calls to `Isolate::Allocate()` and

  // `Isolate::Initialize()`, so that initialization can already start

  // using the platform.

  // When using `NewIsolate()`, this is taken care of by that function.

  // This function may only be called once per `Isolate`.

  virtual void RegisterIsolate(v8::Isolate* isolate,

                               struct uv_loop_s* loop) = 0;

  // This method can be used when an application handles task scheduling on its

  // own through `IsolatePlatformDelegate`. Upon registering an isolate with

  // this overload any other method in this class with the exception of

  // `UnregisterIsolate` *must not* be used on that isolate.

  virtual void RegisterIsolate(v8::Isolate* isolate,

                               IsolatePlatformDelegate* delegate) = 0;

  // This function may only be called once per `Isolate`, and discard any

  // pending delayed tasks scheduled for that isolate.

  // This needs to be called right before calling `Isolate::Dispose()`.

  virtual void UnregisterIsolate(v8::Isolate* isolate) = 0;

  // The platform should call the passed function once all state associated

  // with the given isolate has been cleaned up. This can, but does not have to,

  // happen asynchronously.

  virtual void AddIsolateFinishedCallback(v8::Isolate* isolate,

                                          void (*callback)(void*),

                                          void* data) = 0;

  static std::unique_ptr<MultiIsolatePlatform> Create(

      int thread_pool_size,

      v8::TracingController* tracing_controller = nullptr,

      v8::PageAllocator* page_allocator = nullptr);

};

enum IsolateSettingsFlags {

  MESSAGE_LISTENER_WITH_ERROR_LEVEL = 1 << 0,

  DETAILED_SOURCE_POSITIONS_FOR_PROFILING = 1 << 1,

  SHOULD_NOT_SET_PROMISE_REJECTION_CALLBACK = 1 << 2,

  SHOULD_NOT_SET_PREPARE_STACK_TRACE_CALLBACK = 1 << 3

};

struct IsolateSettings {

  uint64_t flags = MESSAGE_LISTENER_WITH_ERROR_LEVEL |

      DETAILED_SOURCE_POSITIONS_FOR_PROFILING;

  v8::MicrotasksPolicy policy = v8::MicrotasksPolicy::kExplicit;

  // Error handling callbacks

  v8::Isolate::AbortOnUncaughtExceptionCallback

      should_abort_on_uncaught_exception_callback = nullptr;

  v8::FatalErrorCallback fatal_error_callback = nullptr;

  v8::PrepareStackTraceCallback prepare_stack_trace_callback = nullptr;

  // Miscellaneous callbacks

  v8::PromiseRejectCallback promise_reject_callback = nullptr;

  v8::AllowWasmCodeGenerationCallback

      allow_wasm_code_generation_callback = nullptr;

};

// Overriding IsolateSettings may produce unexpected behavior

// in Node.js core functionality, so proceed at your own risk.

NODE_EXTERN void SetIsolateUpForNode(v8::Isolate* isolate,

                                     const IsolateSettings& settings);

// Set a number of callbacks for the `isolate`, in particular the Node.js

// uncaught exception listener.

NODE_EXTERN void SetIsolateUpForNode(v8::Isolate* isolate);

// Creates a new isolate with Node.js-specific settings.

// This is a convenience method equivalent to using SetIsolateCreateParams(),

// Isolate::Allocate(), MultiIsolatePlatform::RegisterIsolate(),

// Isolate::Initialize(), and SetIsolateUpForNode().

NODE_EXTERN v8::Isolate* NewIsolate(ArrayBufferAllocator* allocator,

                                    struct uv_loop_s* event_loop,

                                    MultiIsolatePlatform* platform = nullptr);

NODE_EXTERN v8::Isolate* NewIsolate(

    std::shared_ptr<ArrayBufferAllocator> allocator,

    struct uv_loop_s* event_loop,

    MultiIsolatePlatform* platform);

// Creates a new context with Node.js-specific tweaks.

NODE_EXTERN v8::Local<v8::Context> NewContext(

    v8::Isolate* isolate,

    v8::Local<v8::ObjectTemplate> object_template =

        v8::Local<v8::ObjectTemplate>());

// Runs Node.js-specific tweaks on an already constructed context

// Return value indicates success of operation

NODE_EXTERN v8::Maybe<bool> InitializeContext(v8::Local<v8::Context> context);

// If `platform` is passed, it will be used to register new Worker instances.

// It can be `nullptr`, in which case creating new Workers inside of

// Environments that use this `IsolateData` will not work.

NODE_EXTERN IsolateData* CreateIsolateData(

    v8::Isolate* isolate,

    struct uv_loop_s* loop,

    MultiIsolatePlatform* platform = nullptr,

    ArrayBufferAllocator* allocator = nullptr);

NODE_EXTERN void FreeIsolateData(IsolateData* isolate_data);

struct ThreadId {

  uint64_t id = static_cast<uint64_t>(-1);

};

NODE_EXTERN ThreadId AllocateEnvironmentThreadId();

namespace EnvironmentFlags {

enum Flags : uint64_t {

  kNoFlags = 0,

  // Use the default behaviour for Node.js instances.

  kDefaultFlags = 1 << 0,

  // Controls whether this Environment is allowed to affect per-process state

  // (e.g. cwd, process title, uid, etc.).

  // This is set when using kDefaultFlags.

  kOwnsProcessState = 1 << 1,

  // Set if this Environment instance is associated with the global inspector

  // handling code (i.e. listening on SIGUSR1).

  // This is set when using kDefaultFlags.

  kOwnsInspector = 1 << 2,

  // Set if Node.js should not run its own esm loader. This is needed by some

  // embedders, because it's possible for the Node.js esm loader to conflict

  // with another one in an embedder environment, e.g. Blink's in Chromium.

  kNoRegisterESMLoader = 1 << 3,

  // Set this flag to make Node.js track "raw" file descriptors, i.e. managed

  // by fs.open() and fs.close(), and close them during FreeEnvironment().

  kTrackUnmanagedFds = 1 << 4,

  // Set this flag to force hiding console windows when spawning child

  // processes. This is usually used when embedding Node.js in GUI programs on

  // Windows.

  kHideConsoleWindows = 1 << 5,

  // Set this flag to disable loading native addons via `process.dlopen`.

  // This environment flag is especially important for worker threads

  // so that a worker thread can't load a native addon even if `execArgv`

  // is overwritten and `--no-addons` is not specified but was specified

  // for this Environment instance.

  kNoNativeAddons = 1 << 6,

  // Set this flag to disable searching modules from global paths like

  // $HOME/.node_modules and $NODE_PATH. This is used by standalone apps that

  // do not expect to have their behaviors changed because of globally

  // installed modules.

  kNoGlobalSearchPaths = 1 << 7,

  // Do not export browser globals like setTimeout, console, etc.

  kNoBrowserGlobals = 1 << 8,

  // Controls whether or not the Environment should call V8Inspector::create().

  // This control is needed by embedders who may not want to initialize the V8

  // inspector in situations where one has already been created,

  // e.g. Blink's in Chromium.

  kNoCreateInspector = 1 << 9

};

}  // namespace EnvironmentFlags

struct InspectorParentHandle {

  virtual ~InspectorParentHandle();

};

// TODO(addaleax): Maybe move per-Environment options parsing here.

// Returns nullptr when the Environment cannot be created e.g. there are

// pending JavaScript exceptions.

NODE_EXTERN Environment* CreateEnvironment(

    IsolateData* isolate_data,

    v8::Local<v8::Context> context,

    const std::vector<std::string>& args,

    const std::vector<std::string>& exec_args,

    EnvironmentFlags::Flags flags = EnvironmentFlags::kDefaultFlags,

    ThreadId thread_id = {} /* allocates a thread id automatically */,

    std::unique_ptr<InspectorParentHandle> inspector_parent_handle = {});

// Returns a handle that can be passed to `LoadEnvironment()`, making the

// child Environment accessible to the inspector as if it were a Node.js Worker.

// `child_thread_id` can be created using `AllocateEnvironmentThreadId()`

// and then later passed on to `CreateEnvironment()` to create the child

// Environment, together with the inspector handle.

// This method should not be called while the parent Environment is active

// on another thread.

NODE_EXTERN std::unique_ptr<InspectorParentHandle> GetInspectorParentHandle(

    Environment* parent_env,

    ThreadId child_thread_id,

    const char* child_url);

struct StartExecutionCallbackInfo {

  v8::Local<v8::Object> process_object;

  v8::Local<v8::Function> native_require;

};

using StartExecutionCallback =

    std::function<v8::MaybeLocal<v8::Value>(const StartExecutionCallbackInfo&)>;

NODE_EXTERN v8::MaybeLocal<v8::Value> LoadEnvironment(

    Environment* env,

    StartExecutionCallback cb);

NODE_EXTERN v8::MaybeLocal<v8::Value> LoadEnvironment(

    Environment* env,

    const char* main_script_source_utf8);

NODE_EXTERN void FreeEnvironment(Environment* env);

// Set a callback that is called when process.exit() is called from JS,

// overriding the default handler.

// It receives the Environment* instance and the exit code as arguments.

// This could e.g. call Stop(env); in order to terminate execution and stop

// the event loop.

// The default handler disposes of the global V8 platform instance, if one is

// being used, and calls exit().

NODE_EXTERN void SetProcessExitHandler(

    Environment* env,

    std::function<void(Environment*, int)>&& handler);

NODE_EXTERN void DefaultProcessExitHandler(Environment* env, int exit_code);

// This may return nullptr if context is not associated with a Node instance.

NODE_EXTERN Environment* GetCurrentEnvironment(v8::Local<v8::Context> context);

NODE_EXTERN IsolateData* GetEnvironmentIsolateData(Environment* env);

NODE_EXTERN ArrayBufferAllocator* GetArrayBufferAllocator(IsolateData* data);

NODE_EXTERN void OnFatalError(const char* location, const char* message);

NODE_EXTERN void PromiseRejectCallback(v8::PromiseRejectMessage message);

NODE_EXTERN bool AllowWasmCodeGenerationCallback(v8::Local<v8::Context> context,

                                            v8::Local<v8::String>);

NODE_EXTERN bool ShouldAbortOnUncaughtException(v8::Isolate* isolate);

NODE_EXTERN v8::MaybeLocal<v8::Value> PrepareStackTraceCallback(

    v8::Local<v8::Context> context,

    v8::Local<v8::Value> exception,

    v8::Local<v8::Array> trace);

// This returns the MultiIsolatePlatform used for an Environment or IsolateData

// instance, if one exists.

NODE_EXTERN MultiIsolatePlatform* GetMultiIsolatePlatform(Environment* env);

NODE_EXTERN MultiIsolatePlatform* GetMultiIsolatePlatform(IsolateData* env);

NODE_DEPRECATED("Use MultiIsolatePlatform::Create() instead",

    NODE_EXTERN MultiIsolatePlatform* CreatePlatform(

        int thread_pool_size,

        v8::TracingController* tracing_controller));

NODE_DEPRECATED("Use MultiIsolatePlatform::Create() instead",

    NODE_EXTERN void FreePlatform(MultiIsolatePlatform* platform));

// Get/set the currently active tracing controller. Using CreatePlatform()

// will implicitly set this by default. This is global and should be initialized

// along with the v8::Platform instance that is being used. `controller`

// is allowed to be `nullptr`.

// This is used for tracing events from Node.js itself. V8 uses the tracing

// controller returned from the active `v8::Platform` instance.

NODE_EXTERN v8::TracingController* GetTracingController();

NODE_EXTERN void SetTracingController(v8::TracingController* controller);

// Run `process.emit('beforeExit')` as it would usually happen when Node.js is

// run in standalone mode.

NODE_EXTERN v8::Maybe<bool> EmitProcessBeforeExit(Environment* env);

NODE_DEPRECATED("Use Maybe version (EmitProcessBeforeExit) instead",

    NODE_EXTERN void EmitBeforeExit(Environment* env));

// Run `process.emit('exit')` as it would usually happen when Node.js is run

// in standalone mode. The return value corresponds to the exit code.

NODE_EXTERN v8::Maybe<int> EmitProcessExit(Environment* env);

NODE_DEPRECATED("Use Maybe version (EmitProcessExit) instead",

    NODE_EXTERN int EmitExit(Environment* env));

// Runs hooks added through `AtExit()`. This is part of `FreeEnvironment()`,

// so calling it manually is typically not necessary.

NODE_EXTERN void RunAtExit(Environment* env);

// This may return nullptr if the current v8::Context is not associated

// with a Node instance.

NODE_EXTERN struct uv_loop_s* GetCurrentEventLoop(v8::Isolate* isolate);

// Runs the main loop for a given Environment. This roughly performs the

// following steps:

// 1. Call uv_run() on the event loop until it is drained.

// 2. Call platform->DrainTasks() on the associated platform/isolate.

//   3. If the event loop is alive again, go to Step 1.

// 4. Call EmitProcessBeforeExit().

//   5. If the event loop is alive again, go to Step 1.

// 6. Call EmitProcessExit() and forward the return value.

// If at any point node::Stop() is called, the function will attempt to return

// as soon as possible, returning an empty `Maybe`.

// This function only works if `env` has an associated `MultiIsolatePlatform`.

NODE_EXTERN v8::Maybe<int> SpinEventLoop(Environment* env);

class NODE_EXTERN CommonEnvironmentSetup {

 public:

  ~CommonEnvironmentSetup();

  // Create a new CommonEnvironmentSetup, that is, a group of objects that

  // together form the typical setup for a single Node.js Environment instance.

  // If any error occurs, `*errors` will be populated and the returned pointer

  // will be empty.

  // env_args will be passed through as arguments to CreateEnvironment(), after

  // `isolate_data` and `context`.

  template <typename... EnvironmentArgs>

  static std::unique_ptr<CommonEnvironmentSetup> Create(

      MultiIsolatePlatform* platform,

      std::vector<std::string>* errors,

      EnvironmentArgs&&... env_args);

  struct uv_loop_s* event_loop() const;

  std::shared_ptr<ArrayBufferAllocator> array_buffer_allocator() const;

  v8::Isolate* isolate() const;

  IsolateData* isolate_data() const;

  Environment* env() const;

  v8::Local<v8::Context> context() const;

  CommonEnvironmentSetup(const CommonEnvironmentSetup&) = delete;

  CommonEnvironmentSetup& operator=(const CommonEnvironmentSetup&) = delete;

  CommonEnvironmentSetup(CommonEnvironmentSetup&&) = delete;

  CommonEnvironmentSetup& operator=(CommonEnvironmentSetup&&) = delete;

 private:

  struct Impl;

  Impl* impl_;

  CommonEnvironmentSetup(

      MultiIsolatePlatform*,

      std::vector<std::string>*,

      std::function<Environment*(const CommonEnvironmentSetup*)>);

};

// Implementation for CommonEnvironmentSetup::Create

template <typename... EnvironmentArgs>

    MultiIsolatePlatform* platform,

    std::vector<std::string>* errors,

    EnvironmentArgs&&... env_args) {

      platform, errors,

            setup->isolate_data(), setup->context(),

      }));

}

/* Converts a unixtime to V8 Date */

NODE_DEPRECATED("Use v8::Date::New() directly",

                inline v8::Local<v8::Value> NODE_UNIXTIME_V8(double time) {

                  return v8::Date::New(

                             v8::Isolate::GetCurrent()->GetCurrentContext(),

                             1000 * time)

                      .ToLocalChecked();

                })

#define NODE_UNIXTIME_V8 node::NODE_UNIXTIME_V8

NODE_DEPRECATED("Use v8::Date::ValueOf() directly",

                inline double NODE_V8_UNIXTIME(v8::Local<v8::Date> date) {

  return date->ValueOf() / 1000;

})

#define NODE_V8_UNIXTIME node::NODE_V8_UNIXTIME

#define NODE_DEFINE_CONSTANT(target, constant)                                \

  do {                                                                        \

    v8::Isolate* isolate = target->GetIsolate();                              \

    v8::Local<v8::Context> context = isolate->GetCurrentContext();            \

    v8::Local<v8::String> constant_name =                                     \

        v8::String::NewFromUtf8(isolate, #constant,                           \

            v8::NewStringType::kInternalized).ToLocalChecked();               \

    v8::Local<v8::Number> constant_value =                                    \

        v8::Number::New(isolate, static_cast<double>(constant));              \

    v8::PropertyAttribute constant_attributes =                               \

        static_cast<v8::PropertyAttribute>(v8::ReadOnly | v8::DontDelete);    \

    (target)->DefineOwnProperty(context,                                      \

                                constant_name,                                \

                                constant_value,                               \

                                constant_attributes).Check();                 \

  }                                                                           \

  while (0)

#define NODE_DEFINE_HIDDEN_CONSTANT(target, constant)                         \

  do {                                                                        \

    v8::Isolate* isolate = target->GetIsolate();                              \

    v8::Local<v8::Context> context = isolate->GetCurrentContext();            \

    v8::Local<v8::String> constant_name =                                     \

        v8::String::NewFromUtf8(isolate, #constant,                           \

                                v8::NewStringType::kInternalized)             \

                                  .ToLocalChecked();                          \

    v8::Local<v8::Number> constant_value =                                    \

        v8::Number::New(isolate, static_cast<double>(constant));              \

    v8::PropertyAttribute constant_attributes =                               \

        static_cast<v8::PropertyAttribute>(v8::ReadOnly |                     \

                                           v8::DontDelete |                   \

                                           v8::DontEnum);                     \

    (target)->DefineOwnProperty(context,                                      \

                                constant_name,                                \

                                constant_value,                               \

                                constant_attributes).Check();                 \

  }                                                                           \

  while (0)

// Used to be a macro, hence the uppercase name.

inline void NODE_SET_METHOD(v8::Local<v8::Template> recv,

                            const char* name,

                            v8::FunctionCallback callback) {

  v8::Isolate* isolate = v8::Isolate::GetCurrent();

  v8::HandleScope handle_scope(isolate);

  v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New(isolate,

                                                                callback);

  v8::Local<v8::String> fn_name = v8::String::NewFromUtf8(isolate, name,

      v8::NewStringType::kInternalized).ToLocalChecked();

  t->SetClassName(fn_name);

  recv->Set(fn_name, t);

}

// Used to be a macro, hence the uppercase name.

inline void NODE_SET_METHOD(v8::Local<v8::Object> recv,

                            const char* name,

                            v8::FunctionCallback callback) {

  v8::Isolate* isolate = v8::Isolate::GetCurrent();

  v8::HandleScope handle_scope(isolate);

  v8::Local<v8::Context> context = isolate->GetCurrentContext();

  v8::Local<v8::FunctionTemplate> t = v8::FunctionTemplate::New(isolate,

                                                                callback);

  v8::Local<v8::Function> fn = t->GetFunction(context).ToLocalChecked();

  v8::Local<v8::String> fn_name = v8::String::NewFromUtf8(isolate, name,

      v8::NewStringType::kInternalized).ToLocalChecked();

  fn->SetName(fn_name);

  recv->Set(context, fn_name, fn).Check();

}

#define NODE_SET_METHOD node::NODE_SET_METHOD

// Used to be a macro, hence the uppercase name.

// Not a template because it only makes sense for FunctionTemplates.

inline void NODE_SET_PROTOTYPE_METHOD(v8::Local<v8::FunctionTemplate> recv,

                                      const char* name,

                                      v8::FunctionCallback callback) {

  v8::Isolate* isolate = v8::Isolate::GetCurrent();

  v8::HandleScope handle_scope(isolate);

  v8::Local<v8::Signature> s = v8::Signature::New(isolate, recv);

  v8::Local<v8::FunctionTemplate> t =

      v8::FunctionTemplate::New(isolate, callback, v8::Local<v8::Value>(), s);

  v8::Local<v8::String> fn_name = v8::String::NewFromUtf8(isolate, name,

      v8::NewStringType::kInternalized).ToLocalChecked();

  t->SetClassName(fn_name);

  recv->PrototypeTemplate()->Set(fn_name, t);

}

#define NODE_SET_PROTOTYPE_METHOD node::NODE_SET_PROTOTYPE_METHOD

// BINARY is a deprecated alias of LATIN1.

// BASE64URL is not currently exposed to the JavaScript side.

enum encoding {

  ASCII,

  UTF8,

  BASE64,

  UCS2,

  BINARY,

  HEX,

  BUFFER,

  BASE64URL,

  LATIN1 = BINARY

};

NODE_EXTERN enum encoding ParseEncoding(

    v8::Isolate* isolate,

    v8::Local<v8::Value> encoding_v,

    enum encoding default_encoding = LATIN1);

NODE_EXTERN void FatalException(v8::Isolate* isolate,

                                const v8::TryCatch& try_catch);

NODE_EXTERN v8::Local<v8::Value> Encode(v8::Isolate* isolate,

                                        const char* buf,

                                        size_t len,

                                        enum encoding encoding = LATIN1);

// Warning: This reverses endianness on Big Endian platforms, even though the

// signature using uint16_t implies that it should not.

NODE_EXTERN v8::Local<v8::Value> Encode(v8::Isolate* isolate,

                                        const uint16_t* buf,

                                        size_t len);

// Returns -1 if the handle was not valid for decoding

NODE_EXTERN ssize_t DecodeBytes(v8::Isolate* isolate,

                                v8::Local<v8::Value>,

                                enum encoding encoding = LATIN1);

// returns bytes written.

NODE_EXTERN ssize_t DecodeWrite(v8::Isolate* isolate,

                                char* buf,

                                size_t buflen,

                                v8::Local<v8::Value>,

                                enum encoding encoding = LATIN1);

#ifdef _WIN32

NODE_EXTERN v8::Local<v8::Value> WinapiErrnoException(

    v8::Isolate* isolate,

    int errorno,

    const char* syscall = nullptr,

    const char* msg = "",

    const char* path = nullptr);

#endif

const char* signo_string(int errorno);

typedef void (*addon_register_func)(

    v8::Local<v8::Object> exports,

    v8::Local<v8::Value> module,

    void* priv);

typedef void (*addon_context_register_func)(

    v8::Local<v8::Object> exports,

    v8::Local<v8::Value> module,

    v8::Local<v8::Context> context,

    void* priv);

enum ModuleFlags {

  kLinked = 0x02

};

struct node_module {

  int nm_version;

  unsigned int nm_flags;

  void* nm_dso_handle;

  const char* nm_filename;

  node::addon_register_func nm_register_func;

  node::addon_context_register_func nm_context_register_func;

  const char* nm_modname;

  void* nm_priv;

  struct node_module* nm_link;

};

extern "C" NODE_EXTERN void node_module_register(void* mod);

#ifdef _WIN32

# define NODE_MODULE_EXPORT __declspec(dllexport)

#else

# define NODE_MODULE_EXPORT __attribute__((visibility("default")))

#endif

#ifdef NODE_SHARED_MODE

# define NODE_CTOR_PREFIX

#else

# define NODE_CTOR_PREFIX static

#endif

#if defined(_MSC_VER)

#define NODE_C_CTOR(fn)                                               \

  NODE_CTOR_PREFIX void __cdecl fn(void);                             \

  namespace {                                                         \

  struct fn##_ {                                                      \

    fn##_() { fn(); };                                                \

  } fn##_v_;                                                          \

  }                                                                   \

  NODE_CTOR_PREFIX void __cdecl fn(void)

#else

#define NODE_C_CTOR(fn)                                               \

  NODE_CTOR_PREFIX void fn(void) __attribute__((constructor));        \

  NODE_CTOR_PREFIX void fn(void)

#endif

#define NODE_MODULE_X(modname, regfunc, priv, flags)                  \

  extern "C" {                                                        \

    static node::node_module _module =                                \

    {                                                                 \

      NODE_MODULE_VERSION,                                            \

      flags,                                                          \

      NULL,  /* NOLINT (readability/null_usage) */                    \

      __FILE__,                                                       \

      (node::addon_register_func) (regfunc),                          \

      NULL,  /* NOLINT (readability/null_usage) */                    \

      NODE_STRINGIFY(modname),                                        \

      priv,                                                           \

      NULL   /* NOLINT (readability/null_usage) */                    \

    };                                                                \

    NODE_C_CTOR(_register_ ## modname) {                              \

      node_module_register(&_module);                                 \

    }                                                                 \

  }

#define NODE_MODULE_CONTEXT_AWARE_X(modname, regfunc, priv, flags)    \

  extern "C" {                                                        \

    static node::node_module _module =                                \

    {                                                                 \

      NODE_MODULE_VERSION,                                            \

      flags,                                                          \

      NULL,  /* NOLINT (readability/null_usage) */                    \

      __FILE__,                                                       \

      NULL,  /* NOLINT (readability/null_usage) */                    \

      (node::addon_context_register_func) (regfunc),                  \

      NODE_STRINGIFY(modname),                                        \

      priv,                                                           \

      NULL  /* NOLINT (readability/null_usage) */                     \

    };                                                                \

    NODE_C_CTOR(_register_ ## modname) {                              \

      node_module_register(&_module);                                 \

    }                                                                 \

  }

// Usage: `NODE_MODULE(NODE_GYP_MODULE_NAME, InitializerFunction)`

// If no NODE_MODULE is declared, Node.js looks for the well-known

// symbol `node_register_module_v${NODE_MODULE_VERSION}`.

#define NODE_MODULE(modname, regfunc)                                 \

  NODE_MODULE_X(modname, regfunc, NULL, 0)  // NOLINT (readability/null_usage)

#define NODE_MODULE_CONTEXT_AWARE(modname, regfunc)                   \

  /* NOLINTNEXTLINE (readability/null_usage) */                       \

  NODE_MODULE_CONTEXT_AWARE_X(modname, regfunc, NULL, 0)

// Embedders can use this type of binding for statically linked native bindings.

// It is used the same way addon bindings are used, except that linked bindings

// can be accessed through `process._linkedBinding(modname)`.

#define NODE_MODULE_LINKED(modname, regfunc)                               \

  /* NOLINTNEXTLINE (readability/null_usage) */                            \

  NODE_MODULE_CONTEXT_AWARE_X(modname, regfunc, NULL,                      \

                              node::ModuleFlags::kLinked)

/*

 * For backward compatibility in add-on modules.

 */

#define NODE_MODULE_DECL /* nothing */

#define NODE_MODULE_INITIALIZER_BASE node_register_module_v

#define NODE_MODULE_INITIALIZER_X(base, version)                      \

    NODE_MODULE_INITIALIZER_X_HELPER(base, version)

#define NODE_MODULE_INITIALIZER_X_HELPER(base, version) base##version

#define NODE_MODULE_INITIALIZER                                       \

  NODE_MODULE_INITIALIZER_X(NODE_MODULE_INITIALIZER_BASE,             \

      NODE_MODULE_VERSION)

#define NODE_MODULE_INIT()                                            \

  extern "C" NODE_MODULE_EXPORT void                                  \

  NODE_MODULE_INITIALIZER(v8::Local<v8::Object> exports,              \

                          v8::Local<v8::Value> module,                \

                          v8::Local<v8::Context> context);            \

  NODE_MODULE_CONTEXT_AWARE(NODE_GYP_MODULE_NAME,                     \

                            NODE_MODULE_INITIALIZER)                  \

  void NODE_MODULE_INITIALIZER(v8::Local<v8::Object> exports,         \

                               v8::Local<v8::Value> module,           \

                               v8::Local<v8::Context> context)

// Allows embedders to add a binding to the current Environment* that can be

// accessed through process._linkedBinding() in the target Environment and all

// Worker threads that it creates.

// In each variant, the registration function needs to be usable at least for

// the time during which the Environment exists.

NODE_EXTERN void AddLinkedBinding(Environment* env, const node_module& mod);

NODE_EXTERN void AddLinkedBinding(Environment* env,

                                  const struct napi_module& mod);

NODE_EXTERN void AddLinkedBinding(Environment* env,

                                  const char* name,

                                  addon_context_register_func fn,

                                  void* priv);

/* Registers a callback with the passed-in Environment instance. The callback

 * is called after the event loop exits, but before the VM is disposed.

 * Callbacks are run in reverse order of registration, i.e. newest first.

 */

NODE_EXTERN void AtExit(Environment* env,

                        void (*cb)(void* arg),

                        void* arg);

typedef double async_id;

struct async_context {

  ::node::async_id async_id;

  ::node::async_id trigger_async_id;

};

/* This is a lot like node::AtExit, except that the hooks added via this

 * function are run before the AtExit ones and will always be registered

 * for the current Environment instance.

 * These functions are safe to use in an addon supporting multiple

 * threads/isolates. */

NODE_EXTERN void AddEnvironmentCleanupHook(v8::Isolate* isolate,

                                           void (*fun)(void* arg),

                                           void* arg);

NODE_EXTERN void RemoveEnvironmentCleanupHook(v8::Isolate* isolate,

                                              void (*fun)(void* arg),

                                              void* arg);

/* These are async equivalents of the above. After the cleanup hook is invoked,

 * `cb(cbarg)` *must* be called, and attempting to remove the cleanup hook will

 * have no effect. */

struct ACHHandle;

struct NODE_EXTERN DeleteACHHandle { void operator()(ACHHandle*) const; };

typedef std::unique_ptr<ACHHandle, DeleteACHHandle> AsyncCleanupHookHandle;

/* This function is not intended to be used externally, it exists to aid in

 * keeping ABI compatibility between Node and Electron. */

NODE_EXTERN ACHHandle* AddEnvironmentCleanupHookInternal(

    v8::Isolate* isolate,

    void (*fun)(void* arg, void (*cb)(void*), void* cbarg),

    void* arg);

    v8::Isolate* isolate,

    void (*fun)(void* arg, void (*cb)(void*), void* cbarg),

    void* arg) {

  return AsyncCleanupHookHandle(AddEnvironmentCleanupHookInternal(isolate, fun,