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node_util.cc
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206 lines (162 loc) · 6.74 KB
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#include "node_internals.h"
#include "node_watchdog.h"
namespace node {
namespace util {
using v8::Array;
using v8::Context;
using v8::FunctionCallbackInfo;
using v8::Integer;
using v8::Local;
using v8::Maybe;
using v8::Object;
using v8::Private;
using v8::Promise;
using v8::Proxy;
using v8::String;
using v8::Value;
static void GetPromiseDetails(const FunctionCallbackInfo<Value>& ar
8000
gs) {
// Return undefined if it's not a Promise.
if (!args[0]->IsPromise())
return;
auto isolate = args.GetIsolate();
Local<Promise> promise = args[0].As<Promise>();
Local<Array> ret = Array::New(isolate, 2);
int state = promise->State();
ret->Set(0, Integer::New(isolate, state));
if (state != Promise::PromiseState::kPending)
ret->Set(1, promise->Result());
args.GetReturnValue().Set(ret);
}
static void GetProxyDetails(const FunctionCallbackInfo<Value>& args) {
// Return undefined if it's not a proxy.
if (!args[0]->IsProxy())
return;
Local<Proxy> proxy = args[0].As<Proxy>();
Local<Array> ret = Array::New(args.GetIsolate(), 2);
ret->Set(0, proxy->GetTarget());
ret->Set(1, proxy->GetHandler());
args.GetReturnValue().Set(ret);
}
// Side effect-free stringification that will never throw exceptions.
static void SafeToString(const FunctionCallbackInfo<Value>& args) {
auto context = args.GetIsolate()->GetCurrentContext();
args.GetReturnValue().Set(args[0]->ToDetailString(context).ToLocalChecked());
}
inline Local<Private> IndexToPrivateSymbol(Environment* env, uint32_t index) {
#define V(name, _) &Environment::name,
static Local<Private> (Environment::*const methods[])() const = {
PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
};
#undef V
CHECK_LT(index, arraysize(methods));
return (env->*methods[index])();
}
static void GetHiddenValue(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsObject());
CHECK(args[1]->IsUint32());
Local<Object> obj = args[0].As<Object>();
auto index = args[1]->Uint32Value(env->context()).FromJust();
auto private_symbol = IndexToPrivateSymbol(env, index);
auto maybe_value = obj->GetPrivate(env->context(), private_symbol);
args.GetReturnValue().Set(maybe_value.ToLocalChecked());
}
static void SetHiddenValue(const FunctionCallbackInfo<Value>& args) {
Environment* env = Environment::GetCurrent(args);
CHECK(args[0]->IsObject());
CHECK(args[1]->IsUint32());
Local<Object> obj = args[0].As<Object>();
auto index = args[1]->Uint32Value(env->context()).FromJust();
auto private_symbol = IndexToPrivateSymbol(env, index);
auto maybe_value = obj->SetPrivate(env->context(), private_symbol, args[2]);
args.GetReturnValue().Set(maybe_value.FromJust());
}
void StartSigintWatchdog(const FunctionCallbackInfo<Value>& args) {
int ret = SigintWatchdogHelper::GetInstance()->Start();
args.GetReturnValue().Set(ret == 0);
}
void StopSigintWatchdog(const FunctionCallbackInfo<Value>& args) {
bool had_pending_signals = SigintWatchdogHelper::GetInstance()->Stop();
args.GetReturnValue().Set(had_pending_signals);
}
void WatchdogHasPendingSigint(const FunctionCallbackInfo<Value>& args) {
bool ret = SigintWatchdogHelper::GetInstance()->HasPendingSignal();
args.GetReturnValue().Set(ret);
}
void CreatePromise(const FunctionCallbackInfo<Value>& args) {
Local<Context> context = args.GetIsolate()->GetCurrentContext();
auto maybe_resolver = Promise::Resolver::New(context);
if (!maybe_resolver.IsEmpty())
args.GetReturnValue().Set(maybe_resolver.ToLocalChecked());
}
void PromiseResolve(const FunctionCallbackInfo<Value>& args) {
Local<Context> context = args.GetIsolate()->GetCurrentContext();
Local<Value> promise = args[0];
CHECK(promise->IsPromise());
if (promise.As<Promise>()->State() != Promise::kPending) return;
Local<Promise::Resolver> resolver = promise.As<Promise::Resolver>(); // sic
Maybe<bool> ret = resolver->Resolve(context, args[1]);
args.GetReturnValue().Set(ret.FromMaybe(false));
}
void PromiseReject(const FunctionCallbackInfo<Value>& args) {
Local<Context> context = args.GetIsolate()->GetCurrentContext();
Local<Value> promise = args[0];
CHECK(promise->IsPromise());
if (promise.As<Promise>()->State() != Promise::kPending) return;
Local<Promise::Resolver> resolver = promise.As<Promise::Resolver>(); // sic
Maybe<bool> ret = resolver->Reject(context, args[1]);
args.GetReturnValue().Set(ret.FromMaybe(false));
}
void SafeGetenv(const FunctionCallbackInfo<Value>& args) {
CHECK(args[0]->IsString());
Utf8Value strenvtag(args.GetIsolate(), args[0]);
std::string text;
if (!node::SafeGetenv(*strenvtag, &text)) return;
args.GetReturnValue()
.Set(String::NewFromUtf8(
args.GetIsolate(), text.c_str(),
v8::NewStringType::kNormal).ToLocalChecked());
}
void Initialize(Local<Object> target,
Local<Value> unused,
Local<Context> context) {
Environment* env = Environment::GetCurrent(context);
#define V(name, _) \
target->Set(context, \
FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
Integer::NewFromUnsigned(env->isolate(), index++)).FromJust();
{
uint32_t index = 0;
PER_ISOLATE_PRIVATE_SYMBOL_PROPERTIES(V)
}
#undef V
target->DefineOwnProperty(
env->context(),
OneByteString(env->isolate(), "pushValToArrayMax"),
Integer::NewFromUnsigned(env->isolate(), NODE_PUSH_VAL_TO_ARRAY_MAX),
v8::ReadOnly).FromJust();
#define V(name) \
target->Set(context, \
FIXED_ONE_BYTE_STRING(env->isolate(), #name), \
Integer::New(env->isolate(), Promise::PromiseState::name)) \
.FromJust()
V(kPending);
V(kFulfilled);
V(kRejected);
#undef V
env->SetMethod(target, "getHiddenValue", GetHiddenValue);
env->SetMethod(target, "setHiddenValue", SetHiddenValue);
env->SetMethod(target, "getPromiseDetails", GetPromiseDetails);
env->SetMethod(target, "getProxyDetails", GetProxyDetails);
env->SetMethod(target, "safeToString", SafeToString);
env->SetMethod(target, "startSigintWatchdog", StartSigintWatchdog);
env->SetMethod(target, "stopSigintWatchdog", StopSigintWatchdog);
env->SetMethod(target, "watchdogHasPendingSigint", WatchdogHasPendingSigint);
env->SetMethod(target, "createPromise", CreatePromise);
env->SetMethod(target, "promiseResolve", PromiseResolve);
env->SetMethod(target, "promiseReject", PromiseReject);
env->SetMethod(target, "safeGetenv", SafeGetenv);
}
} // namespace util
} // namespace node
NODE_BUILTIN_MODULE_CONTEXT_AWARE(util, node::util::Initialize)