file frontends/LibFirst_1_0.hpp #

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Defines #

Detailed Description #

Author:

• Anders Kvellestad
• Pat Scott (patscott@physics.mcgill.ca)

Date:

• 2013 Mar, Apr, Nov
• 2013 Apr
• 2014 May

Example of how to use the macros in ‘backend_macros.hpp’ to set up a frontend for a specific library.

Authors (add name and date if you modify):

Macros Documentation #

define BACKENDNAME #

#define BACKENDNAME LibFirst

define BACKENDLANG #

#define BACKENDLANG CXX

define VERSION #

#define VERSION 1.0

define SAFE_VERSION #

#define SAFE_VERSION 1_0

define REFERENCE #

#define REFERENCE GAMBIT:2017yxo

Source code #

//   GAMBIT: Global and Modular BSM Inference Tool
//   *********************************************
///  \file
///
///  Example of how to use the macros in
///  'backend_macros.hpp' to set up a frontend for
///  a specific library.
///
///  *********************************************
///
///  Authors (add name and date if you modify):
///
///  \author Anders Kvellestad
///  \date 2013 Mar, Apr, Nov
///
///  \author Pat Scott
///          (patscott@physics.mcgill.ca)
///  \date 2013 Apr
///  \date 2014 May
///
///  *********************************************


#define BACKENDNAME LibFirst
#define BACKENDLANG CXX
#define VERSION 1.0
#define SAFE_VERSION 1_0
#define REFERENCE GAMBIT:2017yxo

/* The following macro loads the library using dlopen
 * when this header file is included somewhere. */

LOAD_LIBRARY

/* Next we use macros BE_VARIABLE and BE_FUNCTION to load pointers
 * (using dlsym) to the variables and functions within the library.
 *
 * The macros also create functors that wrap the library variables and functions.
 * These are used by the Core for dependency resolution and to set up a suitable
 * interface to the library functions/variables at module level. */

/* Syntax for BE_FUNCTION:
 * BE_FUNCTION([choose function name], [type], [arguement types], "[exact symbol name]", "[choose capability name]")
 */

BE_FUNCTION(initialize, void, (int), "_Z10initializei", "initialize_capability")
BE_FUNCTION(someFunction, void, (), "_Z12someFunctionv", "someFunction")
BE_FUNCTION(returnResult, double, (), "_Z12returnResultv","returnResult_capability")
BE_FUNCTION(byRefExample, double, (double&), "_Z12byRefExampleRd", "refex")
BE_FUNCTION(byRefExample2, void, (double&, double), "_Z13byRefExample2Rdd", "refex2")

/* We have now created the following:
 *
 * - Function pointers
 * Gambit::Backends::LibFirst::initialize       type: void (*)(int)
 * Gambit::Backends::LibFirst::someFunction     type: void (*)()
 * Gambit::Backends::LibFirst::returnResult     type: double (*)()
 *
 * - Functors
 * Gambit::Backends::LibFirst::Functown::initialize       type: Gambit::backend_functor<void,int>
 * Gambit::Backends::LibFirst::Functown::someFunction     type: Gambit::backend_functor<void>
 * Gambit::Backends::LibFirst::Functown::returnResult     type: Gambit::backend_functor<double>  */


/* Syntax for BE_VARIABLE:
 * BE_VARIABLE([name], [type], "[exact symbol name]", "[choose capability name]")
 * */

BE_VARIABLE(SomeInt, int, "someInt", "SomeInt")
BE_VARIABLE(SomeDouble, double, "someDouble", "SomeDouble")

/* We have now created the following:
 *
 * - Pointers
 * Gambit::Backends::LibFirst::SomeInt      type: int*
 * Gambit::Backends::LibFirst::SomeDouble   type: double*
 *
 * - Functors
 * Gambit::Backends::LibFirst::Functown::SomeInt      type: Gambit::backend_functor<int>
 * Gambit::Backends::LibFirst::Functown::SomeDouble   type: Gambit::backend_functor<double> */


/* At this point we have a minimal interface to the loaded library.
 * Any additional convenience functions could be constructed below
 * using the available pointers. All convenience functions must be
 * registred/wrapped via the macro BE_CONV_FUNCTION (see below). */

BE_NAMESPACE
{
  /* Convenience functions go here */
  double awesomenessByAnders(int a)
  {
    logger().send("Message from 'awesomenessByAnders' backend convenience function in LibFirst v1.0 wrapper",LogTags::info);
    initialize(a);
    someFunction();
    return returnResult();
  }
}
END_BE_NAMESPACE

/* Note that BE_NAMESPACE is just
 * namespace Gambit
 * {
 *   namespace Backends
 *   {
 *     namespace CAT_3(BACKENDNAME,_,SAFE_VERSION)
 * and END_BE_NAMESPACE is just
 *   }
 * }
 */

/* Now register any convenience functions and wrap them in functors.
 *
 * Syntax for BE_CONV_FUNCTION:
 * BE_CONV_FUNCTION([function name], type, (arguments), "[choose capability name]") */

BE_CONV_FUNCTION(awesomenessByAnders, double, (int), "awesomeness")

BE_INI_FUNCTION {}
END_BE_INI_FUNCTION

// Undefine macros to avoid conflict with other backends
#include "gambit/Backends/backend_undefs.hpp"

Updated on 2023-06-26 at 21:36:57 +0000