/* Copyright (c) 2004-2020. The SimGrid Team. All rights reserved.          */

/* This program is free software; you can redistribute it and/or modify it
 * under the terms of the license (GNU LGPL) which comes with this package. */

#include "mc/mc.h"
#include "simgrid/s4u/Engine.hpp"
#include "simgrid/s4u/Host.hpp"
#include "src/instr/instr_private.hpp"
#include "src/msg/msg_private.hpp"
#include "src/simix/smx_private.hpp"
#include <xbt/config.hpp>

XBT_LOG_NEW_CATEGORY(msg, "All MSG categories");

bool MSG_Global_t::debug_multiple_use = false;

MSG_Global_t* msg_global = nullptr;

static void MSG_exit();

/********************************* MSG **************************************/

/**
 * @ingroup msg_simulation
 * @brief Initialize MSG with less verifications
 * You should use the MSG_init() function instead. Failing to do so may turn into PEBKAC some day. You've been warned.
 */
void MSG_init_nocheck(int* argc, char** argv)
{
  TRACE_global_init();

  if (not msg_global) {
    simgrid::config::bind_flag(MSG_Global_t::debug_multiple_use, "msg/debug-multiple-use",
                               "Print backtraces of both processes when there is a conflict of multiple use of a task");

    SIMIX_global_init(argc, argv);

    msg_global = new MSG_Global_t();

    msg_global->sent_msg = 0;
    msg_global->task_copy_callback = nullptr;
    msg_global->process_data_cleanup = nullptr;
    simgrid::s4u::Actor::on_termination.connect([](simgrid::s4u::Actor const& actor) {
      // free the data if a function was provided
      void* userdata = sg_actor_data(&actor);
      if (userdata && msg_global->process_data_cleanup)
        msg_global->process_data_cleanup(userdata);
    });
  }

  if(MC_is_active()){
    /* Ignore total amount of messages sent during the simulation for heap comparison */
    MC_ignore_heap(&(msg_global->sent_msg), sizeof(msg_global->sent_msg));
  }

  if (simgrid::config::get_value<bool>("debug/clean-atexit"))
    atexit(MSG_exit);
}

void MSG_config(const char* key, const char* value)
{
  xbt_assert(msg_global,"ERROR: Please call MSG_init() before using MSG_config()");
  simgrid::config::set_as_string(key, value);
}

static void MSG_exit()
{
  delete msg_global;
  msg_global = nullptr;
}

unsigned long int MSG_get_sent_msg()
{
  return msg_global->sent_msg;
}

/** @brief register functions bypassing the parser */
void MSG_set_function(const char* host_id, const char* function_name, xbt_dynar_t arguments)
{
  SIMIX_process_set_function(host_id, function_name, arguments, -1, -1);
}
