runtime.cc

// Copyright (c) 2015-2017 DMOJ: Modern Online Judge. All rights reserved.
// Copyright 2012 the V8 project authors. All rights reserved.
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// modification, are permitted provided that the following conditions are
// met:
//
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//       notice, this list of conditions and the following disclaimer.
//     * Redistributions in binary form must reproduce the above
//       copyright notice, this list of conditions and the following
//       disclaimer in the documentation and/or other materials provided
//       with the distribution.
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//       contributors may be used to endorse or promote products derived
//       from this software without specific prior written permission.
//
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#include "v8dmoj.h"

#include <chrono>
#include <cstdio>
#include <cstdlib>
#include <thread>

// The callback that is invoked by v8 whenever the JavaScript 'quit'
// function is called.  Quits.
static void Quit(const v8::FunctionCallbackInfo<v8::Value> &args) {
  // If not arguments are given args[0] will yield undefined which
  // converts to the integer value 0.
  int exit_code =
      args[0]->Int32Value(args.GetIsolate()->GetCurrentContext()).FromMaybe(0);

  std::fflush(stdout);
  std::fflush(stderr);
  std::exit(exit_code);
}

void Version(const v8::FunctionCallbackInfo<v8::Value> &args) {
  args.GetReturnValue().Set(v8::String::NewFromUtf8(args.GetIsolate(),
                                                    v8::V8::GetVersion(),
                                                    v8::NewStringType::kNormal)
                                .ToLocalChecked());
}

void Sleep(const v8::FunctionCallbackInfo<v8::Value> &args) {
  int ms =
      args[0]->Int32Value(args.GetIsolate()->GetCurrentContext()).FromMaybe(0);
  std::chrono::milliseconds duration(ms);
  std::this_thread::sleep_for(duration);
}

void InitializeRuntimeModule(v8::Isolate *isolate,
                             v8::Local<v8::ObjectTemplate> &global) {
  // Bind the 'quit' function
  global->Set(
      v8::String::NewFromUtf8(isolate, "quit", v8::NewStringType::kNormal)
          .ToLocalChecked(),
      v8::FunctionTemplate::New(isolate, Quit));

  // Bind the 'version' function
  global->Set(
      v8::String::NewFromUtf8(isolate, "version", v8::NewStringType::kNormal)
          .ToLocalChecked(),
      v8::FunctionTemplate::New(isolate, Version));

  // Bind the 'sleep' function
  global->Set(
      v8::String::NewFromUtf8(isolate, "sleep", v8::NewStringType::kNormal)
          .ToLocalChecked(),
      v8::FunctionTemplate::New(isolate, Sleep));
}