如何将C ++多线程代码转换为javascript？

Question

我有一个多线程c ++代码。我想将其转换为javascript文件

#include <iostream>
#include <cstdlib>
#include <pthread.h>

using namespace std;

#define NUM_THREADS 5

void *PrintHello(void *threadid) {
   long tid;
   tid = (long)threadid;
   cout << "Hello World! Thread ID, " << tid << endl;
   pthread_exit(NULL);
}

int main () {
   pthread_t threads[NUM_THREADS];
   int rc;
   int i;

   for( i = 0; i < NUM_THREADS; i++ ) {
      cout << "main() : creating thread, " << i << endl;
      rc = pthread_create(&threads[i], NULL, PrintHello, (void *)i);

      if (rc) {
         cout << "Error:unable to create thread!!!" << rc << endl;
         exit(-1);
      }
   }
   pthread_exit(NULL);
}

我使用emscripten将其转换为html

em++ test.cpp -o test.html

然后我使用Firefox / chrome打开它。创建线程出错。

我的问题是js是否支持c ++多线程代码？