task_base.hpp

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//  Copyright (c) 2005-2007 Andre Merzky (andre@merzky.net)
//  Copyright (c) 2007 Ole Weidner (oweidner@cct.lsu.edu)
// 
//  Distributed under the Boost Software License, Version 1.0. (See accompanying 
//  file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)

#ifndef SAGA_TASK_BASE_HPP
#define SAGA_TASK_BASE_HPP

#include <saga/saga/util.hpp>
#include <boost/mpl/has_xxx.hpp>

namespace saga 
{
    namespace attributes
    {
        // textual representation of task states, required as metric values
        char const* const task_state_unknown = "Unknown";
        char const* const task_state_new = "New";
        char const* const task_state_running = "Running";
        char const* const task_state_done = "Done";
        char const* const task_state_canceled = "Canceled";
        char const* const task_state_failed = "Failed";
    }

    struct task_base 
    {
        enum state 
        {
            Unknown   = -1,
            New       =  1,
            Running   =  2,
            Done      =  3,
            Canceled  =  4,
            Failed    =  5
        };


        // tagging definitions
        struct Sync { struct sync_tag; };
        struct Async { struct sync_tag; };
        struct Task  { struct sync_tag; };
    };

    namespace detail
    {
        BOOST_MPL_HAS_XXX_TRAIT_DEF(sync_tag)
    }

    namespace adaptors
    {
        task_base::state SAGA_EXPORT task_state_value_to_enum(std::string const& val);
        std::string SAGA_EXPORT task_state_enum_to_value(int s);
    }
} // namespace saga

#endif  // SAGA_TASK_BASE_HPP