epee_boosted_tcp_server.cpp

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// Copyrights(c) 2017-2021, The Electroneum Project
// Copyrights(c) 2014-2019, The Monero Project
// 
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//    conditions and the following disclaimer.
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// 2. Redistributions in binary form must reproduce the above copyright notice, this list
//    of conditions and the following disclaimer in the documentation and/or other
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// Parts of this file are originally copyright (c) 2012-2013 The Cryptonote developers
 
#include <boost/chrono/chrono.hpp>
#include <boost/thread/condition_variable.hpp>
#include <boost/thread/mutex.hpp>
 
#include "gtest/gtest.h"
 
#include "include_base_utils.h"
#include "string_tools.h"
#include "net/abstract_tcp_server2.h"
 
namespace
{
  const uint32_t test_server_port = 5626;
  const std::string test_server_host("127.0.0.1");
 
  struct test_connection_context : public epee::net_utils::connection_context_base
  {
  };
 
  struct test_protocol_handler_config
  {
  };
 
  struct test_protocol_handler
  {
    typedef test_connection_context connection_context;
    typedef test_protocol_handler_config config_type;
 
    test_protocol_handler(epee::net_utils::i_service_endpoint* /*psnd_hndlr*/, config_type& /*config*/, connection_context& /*conn_context*/)
    {
    }
 
    void after_init_connection()
    {
    }
 
    void handle_qued_callback()
    {
    }
 
    bool release_protocol()
    {
      return true;
    }
 
    bool handle_recv(const void* /*data*/, size_t /*size*/)
    {
      return false;
    }
  };
 
  typedef epee::net_utils::boosted_tcp_server<test_protocol_handler> test_tcp_server;
}
 
TEST(boosted_tcp_server, worker_threads_are_exception_resistant)
{
  test_tcp_server srv(epee::net_utils::e_connection_type_RPC); // RPC disables network limit for unit tests
  ASSERT_TRUE(srv.init_server(test_server_port, test_server_host));
 
  boost::mutex mtx;
  boost::condition_variable cond;
  int counter = 0;
 
  auto counter_incrementer = [&counter, &cond, &mtx]()
  {
    boost::unique_lock<boost::mutex> lock(mtx);
    ++counter;
    if (4 <= counter)
    {
      cond.notify_one();
    }
  };
 
  // 2 theads, but 4 exceptions
  ASSERT_TRUE(srv.run_server(2, false));
  ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw std::runtime_error("test 1"); }));
  ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw std::string("test 2"); }));
  ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw "test 3"; }));
  ASSERT_TRUE(srv.async_call([&counter_incrementer]() { counter_incrementer(); throw 4; }));
 
  {
    boost::unique_lock<boost::mutex> lock(mtx);
    ASSERT_NE(boost::cv_status::timeout, cond.wait_for(lock, boost::chrono::seconds(5)));
    ASSERT_EQ(4, counter);
  }
 
  // Check if threads are alive
  counter = 0;
  //auto counter_incrementer = [&counter]() { counter.fetch_add(1); epee::misc_utils::sleep_no_w(counter.load() * 10); };
  ASSERT_TRUE(srv.async_call(counter_incrementer));
  ASSERT_TRUE(srv.async_call(counter_incrementer));
  ASSERT_TRUE(srv.async_call(counter_incrementer));
  ASSERT_TRUE(srv.async_call(counter_incrementer));
 
  {
    boost::unique_lock<boost::mutex> lock(mtx);
    ASSERT_NE(boost::cv_status::timeout, cond.wait_for(lock, boost::chrono::seconds(5)));
    ASSERT_EQ(4, counter);
  }
 
  srv.send_stop_signal();
  ASSERT_TRUE(srv.timed_wait_server_stop(5 * 1000));
  ASSERT_TRUE(srv.deinit_server());
}