tag_scope.hh

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/*
    @@@@@@@@  @@           @@@@@@   @@@@@@@@ @@
   /@@/////  /@@          @@////@@ @@////// /@@
   /@@       /@@  @@@@@  @@    // /@@       /@@
   /@@@@@@@  /@@ @@///@@/@@       /@@@@@@@@@/@@
   /@@////   /@@/@@@@@@@/@@       ////////@@/@@
   /@@       /@@/@@//// //@@    @@       /@@/@@
   /@@       @@@//@@@@@@ //@@@@@@  @@@@@@@@ /@@
   //       ///  //////   //////  ////////  //

   Copyright (c) 2016, Triad National Security, LLC
   All rights reserved.
                                                                              */
#pragma once

#include <flecsi-config.h>

#if defined(FLECSI_ENABLE_FLOG)

#include "flecsi/log/state.hh"

namespace flecsi {
namespace log {

struct tag_scope_t {
  tag_scope_t(size_t tag = 0) : stash_(flog_t::instance().active_tag()) {
#if defined(FLOG_ENABLE_DEBUG)
    std::cerr << FLOG_COLOR_LTGRAY << "FLOG: activating tag " << tag
              << FLOG_COLOR_PLAIN << std::endl;
#endif

    // Warn users about externally-scoped messages
    if(!flog_t::instance().initialized()) {
      std::cerr
        << FLOG_COLOR_YELLOW << "FLOG: !!!WARNING You cannot use "
        << "tag guards for externally scoped messages!!! "
        << "This message will be active if FLOG_ENABLE_EXTERNAL is defined!!!"
        << FLOG_COLOR_PLAIN << std::endl;
    } // if

    flog_t::instance().active_tag() = tag;
  } // tag_scope_t

  ~tag_scope_t() {
    flog_t::instance().active_tag() = stash_;
  } // ~tag_scope_t

private:
  size_t stash_;

}; // tag_scope_t

} // namespace log
} // namespace flecsi

#endif // FLECSI_ENABLE_FLOG