File: vtkModuleSerialization.cmake

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set(_vtkModuleSerialization_source_dir "${CMAKE_CURRENT_LIST_DIR}")

#[==[.rst:
**********************
vtkModuleSerialization
**********************

#]==]
#[==[.rst:
.. cmake:command:: vtk_module_generate_library_serdes_registrar

  Generate functions that register (de)serialization functions for all classes
  in a library. |module-serialization|

  .. code-block:: cmake

    vtk_module_generate_library_serdes_registrar(
      MODULE             <module>
      EXPORT_MACRO_NAME  <export_macro_name>
      EXPORT_FILE_NAME   <export_file_name>
      REGISTRAR_HEADER   <registrar_header>
      REGISTRAR_SOURCE   <registrar_source>
      CLASSES            <class>...)

  Declares registrar function for ``MODULE`` in ``REGISTRAR_HEADER`` and
  writes implementation of the registrar in ``REGISTRAR_SOURCE``.

  * ``MODULE``: The name of a module.
  * ``EXPORT_MACRO_NAME``: The name of the export macro for ``MODULE``.
  * ``EXPORT_FILE_NAME``: The name of the header file which defines ``EXPORT_MACRO_NAME``
    for ``MODULE``.
  * ``REGISTRAR_HEADER``: This file will hold the declaration of regsitrar function for ``MODULE``.
  * ``REGISTRAR_SOURCE``: This file will contain the implementation of regsitrar function for ``MODULE``.
  * ``CLASSES``: List of classes that will be registered with (de)serializer in this library.

#]==]
function (vtk_module_generate_library_serdes_registrar)
  cmake_parse_arguments(PARSE_ARGV 0 _vtk_serdes
    ""
    "MODULE;EXPORT_MACRO_NAME;EXPORT_FILE_NAME;REGISTRAR_HEADER;REGISTRAR_SOURCE"
    "CLASSES")

  if (_vtk_serdes_UNPARSED_ARGUMENTS)
    message(FATAL_ERROR
      "Unparsed arguments for vtk_module_generate_library_serdes_registrar: "
      "${_vtk_serdes_UNPARSED_ARGUMENTS}")
  endif ()

  if (NOT _vtk_serdes_MODULE)
    message(FATAL_ERROR "No module was specified!")
  endif ()

  if (NOT _vtk_serdes_EXPORT_MACRO_NAME)
    message(FATAL_ERROR "No export macro name was specified!")
  endif ()

  if (NOT _vtk_serdes_EXPORT_FILE_NAME)
    message(FATAL_ERROR "No export file name was specified!")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_HEADER)
    message(FATAL_ERROR "No registrar header file name was specified!")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_SOURCE)
    message(FATAL_ERROR "No registrar source file name was specified!")
  endif ()

  if (NOT _vtk_serdes_CLASSES)
    message(FATAL_ERROR "No classes were specified!")
  endif ()

  get_filename_component(_vtk_serdes_library_registrar_header "${_vtk_serdes_REGISTRAR_HEADER}" NAME)
  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "library_name"
    VARIABLE  _vtk_serdes_library_name)

  set(_vtk_serdes_library "${_vtk_serdes_library_name}")
  set(_vtk_serdes_module_export_header "${_vtk_serdes_EXPORT_FILE_NAME}")
  set(_vtk_serdes_module_export_macro "${_vtk_serdes_EXPORT_MACRO_NAME}")
  set(_vtk_serdes_register_classes "")
  set(_vtk_serdes_register_classes_decls "")
  foreach (_vtk_serdes_class IN LISTS _vtk_serdes_CLASSES)
    string(APPEND _vtk_serdes_register_classes_decls
      "  int RegisterHandlers_${_vtk_serdes_class}SerDes(void* serializer, void* deserializer, void* invoker);\n")
    string(APPEND _vtk_serdes_register_classes "
  if(!RegisterHandlers_${_vtk_serdes_class}SerDes(serializer, deserializer, invoker))
  {
    *error = \"Failed to register handlers for ${_vtk_serdes_class}\";
    return FAIL;
  }\n")
  endforeach ()
  configure_file(
    "${_vtkModuleSerialization_source_dir}/vtkSerializationLibraryRegistrar.h.in"
    "${_vtk_serdes_REGISTRAR_HEADER}"
    @ONLY)
  configure_file(
    "${_vtkModuleSerialization_source_dir}/vtkSerializationLibraryRegistrar.cxx.in"
    "${_vtk_serdes_REGISTRAR_SOURCE}"
    @ONLY)
endfunction ()

#[==[.rst:
.. cmake:command:: vtk_module_generate_libraries_serdes_registrar

  Generate functions that register (de)serialization handlers for a
  collection of modules. |module-serialization|

  .. code-block:: cmake

    vtk_module_generate_libraries_serdes_registrar(
      REGISTRAR_NAME     <registrar_name>
      REGISTRAR_SOURCE   <registrar_source>
      [MANDATORY_MODULES  <module>...]
      [OPTIONAL_MODULES   <module>...])

  Invokes registrar functions for all modules from ``OPTIONAL_MODULES`` and ``MANDATORY_MODULES``.
  Code is generated in ``REGISTRAR_SOURCE``.

  * ``REGISTRAR_NAME``: The name of the registrar function.
  * ``REGISTRAR_SOURCE``: This file will contain the implementation of regsitrar
    function which registers handlers for all ``MANDATORY_MODULES`` and ``OPTIONAL_MODULES``.
  * ``MANDATORY_MODULES``:  A list of ``PUBLIC`` or ``PRIVATE`` dependencies
    of the module which ``REGISTRAR_SOURCE`` is compiled into.
  * ``OPTIONAL_MODULES``: A list of optional dependencies of the module
    which ``REGISTRAR_SOURCE`` is compiled into.

#]==]
function (vtk_module_generate_libraries_serdes_registrar)
  cmake_parse_arguments(PARSE_ARGV 0 _vtk_serdes
    ""
    "REGISTRAR_NAME;REGISTRAR_SOURCE"
    "MANDATORY_MODULES;OPTIONAL_MODULES;")

  if (_vtk_serdes_UNPARSED_ARGUMENTS)
    message(FATAL_ERROR
      "Unparsed arguments for vtk_module_generate_libraries_serdes_registrar: "
      "${_vtk_serdes_UNPARSED_ARGUMENTS}")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_NAME)
    message(FATAL_ERROR "No registrar name was specified!")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_SOURCE)
    message(FATAL_ERROR "No registrar source file was specified!")
  endif ()

  set(_vtk_serdes_registrar_name "${_vtk_serdes_REGISTRAR_NAME}")

  set(_vtk_serdes_include_mandatory_libraries_registrar_headers "")
  set(_vtk_serdes_register_mandatory_libraries "")
  foreach (_vtk_serdes_module IN LISTS _vtk_serdes_MANDATORY_MODULES)
    _vtk_module_get_module_property("${_vtk_serdes_module}"
      PROPERTY "library_name"
      VARIABLE _vtk_serdes_library_name)
    string(APPEND _vtk_serdes_include_mandatory_libraries_registrar_headers
      "#include \"${_vtk_serdes_library_name}SerDes.h\"")
    string(APPEND _vtk_serdes_register_mandatory_libraries "
  if(!RegisterClasses_${_vtk_serdes_library_name}(serializer, deserializer, invoker, error))
  {
    return FAIL;
  }\n")
  endforeach ()

  set(_vtk_serdes_include_optional_libraries_registrar_headers "")
  set(_vtk_serdes_register_optional_libraries "")
  foreach (_vtk_serdes_module IN LISTS _vtk_serdes_OPTIONAL_MODULES)
    _vtk_module_optional_dependency_exists("${_vtk_serdes_module}"
      SATISFIED_VAR _vtk_serdes_module_exists)
    if (NOT _vtk_serdes_module_exists)
      continue ()
    endif ()
    _vtk_module_get_module_property("${_vtk_serdes_module}"
      PROPERTY "library_name"
      VARIABLE _vtk_serdes_library_name)
    string(REPLACE "::" "_" _vtk_serdes_module_enabled_condition "VTK_MODULE_ENABLE_${_vtk_serdes_module}")
    string(APPEND _vtk_serdes_include_optional_libraries_registrar_headers "
#if ${_vtk_serdes_module_enabled_condition}
#include \"${_vtk_serdes_library_name}SerDes.h\"
#endif\n")
    string(APPEND _vtk_serdes_register_optional_libraries "
#if ${_vtk_serdes_module_enabled_condition}
  if(!RegisterClasses_${_vtk_serdes_library_name}(serializer, deserializer, invoker, error))
  {
    return FAIL;
  }
#endif\n")
  endforeach ()

  configure_file(
    "${_vtkModuleSerialization_source_dir}/vtkSerializationLibrariesRegistrar.cxx.in"
    "${_vtk_serdes_REGISTRAR_SOURCE}"
    @ONLY)
endfunction ()

#[==[.rst:
.. cmake:command:: _vtk_module_serdes_generate_sources

  Generate (de)serialization functions for classes that belong to
  ``MODULE`` in ``SERDES_SOURCES``. |module-serialization|

  .. code-block:: cmake

    _vtk_module_serdes_generate_sources(
      MODULE              <module>
      SERIALIZED_CLASSES  <serialzied_classes>
      SERDES_SOURCES      <serdes_sources>)

  * ``MODULE``: Generates serialization sources for all classes in ``MODULE``
  * ``SERIALIZED_CLASSES``: This variable will contain the list of all classes that
    were serialized.
  * ``SERDES_SOURCES``: This variable will contain the list of all sources that
    were generated for ``SERIALIZED_CLASSES`` in ``MODULE``.

#]==]
function (_vtk_module_serdes_generate_sources)
  cmake_parse_arguments(PARSE_ARGV 0 _vtk_serdes
    ""
    "MODULE;SERIALIZED_CLASSES;SERDES_SOURCES"
    "")

  if (_vtk_serdes_UNPARSED_ARGUMENTS)
    message (FATAL_ERROR
      "Unparsed arguments for _vtk_module_serdes_generate_sources: "
      "${_vtk_serdes_UNPARSED_ARGUMENTS}")
  endif ()

  if (NOT _vtk_serdes_MODULE)
    message(FATAL_ERROR "No module was specified!")
  endif ()

  if (NOT _vtk_serdes_SERIALIZED_CLASSES)
    message(FATAL_ERROR "No output variable for serialized classes was specified!")
  endif ()

  if (NOT _vtk_serdes_SERDES_SOURCES)
    message(FATAL_ERROR "No output variable for serialization and deserialization sources were specified")
  endif ()

  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY "library_name"
    VARIABLE _vtk_serdes_library_name)
  set(_vtk_serdes_args_file "${CMAKE_CURRENT_BINARY_DIR}/${_vtk_serdes_library_name}-SerDes.$<CONFIGURATION>.args")
  set(_vtk_serdes_hierarchy_depends "${_vtk_serdes_MODULE}")
  # Get public dependencies of `module`.
  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "public_depends"
    VARIABLE  _vtk_serdes_public_depends)
  list(APPEND _vtk_serdes_hierarchy_depends
    ${_vtk_serdes_public_depends})
  # Get private dependencies of `module`.
  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "private_depends"
    VARIABLE  _vtk_serdes_private_depends)
  list(APPEND _vtk_serdes_hierarchy_depends
    ${_vtk_serdes_private_depends})
  # Get optional dependencies of `module`.
  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "optional_depends"
    VARIABLE  _vtk_serdes_optional_depends)
  # Appended into hierarchy depends only if those optional dependencies are declared as targets
  foreach (_vtk_serdes_optional_depend IN LISTS _vtk_serdes_optional_depends)
    _vtk_module_optional_dependency_exists("${_vtk_serdes_optional_depend}"
      SATISFIED_VAR _vtk_serdes_optional_depend_exists)
    if (_vtk_serdes_optional_depend_exists)
      list(APPEND _vtk_serdes_hierarchy_depends
        "${_vtk_serdes_optional_depend}")
    endif ()
  endforeach ()
  # Add hierarchy targets or files as dependencies to the vtkSerDes command.
  set(_vtk_serdes_command_depends)
  set(_vtk_serdes_hierarchy_files)
  foreach (_vtk_serdes_hierarchy_depend IN LISTS _vtk_serdes_hierarchy_depends)
    _vtk_module_get_module_property("${_vtk_serdes_hierarchy_depend}"
      PROPERTY  "hierarchy"
      VARIABLE  _vtk_serdes_hierarchy_file)
    if (_vtk_serdes_hierarchy_file)
      list(APPEND _vtk_serdes_hierarchy_files "${_vtk_serdes_hierarchy_file}")
      get_property(_vtk_serdes_is_imported
        TARGET   "${_vtk_serdes_hierarchy_depend}"
        PROPERTY "IMPORTED")
      if (_vtk_serdes_is_imported OR CMAKE_GENERATOR MATCHES "Ninja")
        list(APPEND _vtk_serdes_command_depends "${_vtk_serdes_hierarchy_file}")
      else ()
        _vtk_module_get_module_property("${_vtk_serdes_hierarchy_depend}"
          PROPERTY "library_name"
          VARIABLE _vtk_serdes_hierarchy_library_name)
        if (TARGET "${_vtk_serdes_hierarchy_library_name}-hierarchy")
          list(APPEND _vtk_serdes_command_depends "${_vtk_serdes_hierarchy_library_name}-hierarchy")
        else ()
          message(FATAL_ERROR
            "The ${_vtk_serdes_hierarchy_depend} hierarchy file is attached to a non-imported target "
            "and a hierarchy target (${_vtk_serdes_hierarchy_library_name}-hierarchy) is "
            "missing.")
        endif ()
      endif ()
    endif ()
  endforeach ()

  set(_vtk_serdes_genex_allowed 1)
  _vtk_module_real_target(_vtk_serdes_real_target_name "${_vtk_serdes_MODULE}")
  if (CMAKE_VERSION VERSION_LESS "3.19")
    get_property(_vtk_serdes_target_type
      TARGET  "${_vtk_serdes_real_target_name}"
      PROPERTY TYPE)
    if (_vtk_serdes_target_type STREQUAL "INTERFACE_LIBRARY")
      set(_vtk_serdes_genex_allowed 0)
    endif ()
  endif ()

  set(_vtk_serdes_genex_compile_definitions "")
  set(_vtk_serdes_genex_include_directories "")
  if (_vtk_serdes_genex_allowed)
    set(_vtk_serdes_genex_compile_definitions
      "$<TARGET_PROPERTY:${_vtk_serdes_real_target_name},COMPILE_DEFINITIONS>")
    set(_vtk_serdes_genex_include_directories
      "$<TARGET_PROPERTY:${_vtk_serdes_real_target_name},INCLUDE_DIRECTORIES>")
  else ()
    if (NOT DEFINED ENV{CI})
      message(AUTHOR_WARNING
        "The generation of serialization sources is not using target-local compile definitions or "
        "include directories. This may affect generation of the serialization "
        "sources for the ${_vtk_serdes_MODULE} module. Use CMake 3.19+ to "
        "guarantee intended behavior.")
    endif ()
  endif ()
  file(GENERATE
    OUTPUT  "${_vtk_serdes_args_file}"
    CONTENT "$<$<BOOL:${_vtk_serdes_genex_compile_definitions}>:\n-D\'$<JOIN:${_vtk_serdes_genex_compile_definitions},\'\n-D\'>\'>\n
$<$<BOOL:${_vtk_serdes_genex_include_directories}>:\n-I\'$<JOIN:${_vtk_serdes_genex_include_directories},\'\n-I\'>\'>\n
$<$<BOOL:${_vtk_serdes_hierarchy_files}>:\n--types \'$<JOIN:${_vtk_serdes_hierarchy_files},\'\n--types \'>\'>\n")

  set(_vtk_serdes_classes)
  set(_vtk_serdes_sources)

  # Get the list of public headers from the module
  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "headers"
    VARIABLE  _vtk_serdes_headers)

  foreach (_vtk_serdes_header IN LISTS _vtk_serdes_headers)
    # Assume the class name matches the basename of the header file. This is a VTK convention
    get_filename_component(_vtk_serdes_classname "${_vtk_serdes_header}" NAME_WE)
    set(_vtk_serdes_source_output
      "${CMAKE_CURRENT_BINARY_DIR}/${_vtk_serdes_classname}SerDes.cxx")
    set(_vtk_serdes_depfile_genex
      "${CMAKE_CURRENT_BINARY_DIR}/${_vtk_serdes_classname}SerDes.cxx.$<CONFIG>.d")
    set(_vtk_serdes_depfile_nogenex
      "${CMAKE_CURRENT_BINARY_DIR}/${_vtk_serdes_classname}SerDes.cxx.d")
    list(APPEND _vtk_serdes_classes
      "${_vtk_serdes_classname}")
    list(APPEND _vtk_serdes_sources
      ${_vtk_serdes_source_output})

    set(_vtk_wrap_serdes_target "VTK::WrapSerDes")
    set(_vtk_serdes_macros_args)
    if (TARGET VTKCompileTools::WrapSerDes)
      set(_vtk_wrap_serdes_target "VTKCompileTools::WrapSerDes")
      if (TARGET VTKCompileTools_macros)
        list(APPEND _vtk_serdes_command_depends
          "VTKCompileTools_macros")
        list(APPEND _vtk_serdes_macros_args
          -undef
          -imacros "${_VTKCompileTools_macros_file}")
      endif ()
    endif ()

    _vtk_module_depfile_args(
      MULTI_CONFIG_NEEDS_GENEX
      TOOL_ARGS _vtk_serdes_depfile_flags
      CUSTOM_COMMAND_ARGS _vtk_serdes_depfile_args
      SOURCE "${_vtk_serdes_header}"
      DEPFILE_PATH "${_vtk_serdes_depfile_genex}"
      DEPFILE_NO_GENEX_PATH "${_vtk_serdes_depfile_nogenex}"
      TOOL_FLAGS "-MF")

    add_custom_command(
      OUTPUT  "${_vtk_serdes_source_output}"
      COMMAND ${CMAKE_CROSSCOMPILING_EMULATOR}
              "$<TARGET_FILE:${_vtk_wrap_serdes_target}>"
              ${_vtk_serdes_depfile_flags}
              "@${_vtk_serdes_args_file}"
              -o "${_vtk_serdes_source_output}"
              "${_vtk_serdes_header}"
              ${_vtk_serdes_macros_args}
      ${_vtk_serdes_depfile_args}
      COMMENT "Generating serialization sources for ${_vtk_serdes_classname}"
      DEPENDS
        "${_vtk_serdes_header}"
        "${_vtk_serdes_args_file}"
        "$<TARGET_FILE:${_vtk_wrap_serdes_target}>"
        ${_vtk_serdes_command_depends})
  endforeach ()

  set("${_vtk_serdes_SERIALIZED_CLASSES}"
    "${_vtk_serdes_classes}"
    PARENT_SCOPE)
  set("${_vtk_serdes_SERDES_SOURCES}"
    "${_vtk_serdes_sources}"
    PARENT_SCOPE)
endfunction ()

#[==[.rst:
.. cmake:command:: vtk_module_serdes

  Generate (de)serialization code for all classes in a ``MODULE``. |module-serialization|

  .. code-block:: cmake

    vtk_module_serdes(
      MODULE            <module>
      EXPORT_MACRO_NAME <export_macro_name>
      EXPORT_FILE_NAME  <export_file_name>
      REGISTRAR_HEADER  <header>
      REGISTRAR_SOURCE  <source>
      SERDES_SOURCES    <serdes_sources>)

  * ``MODULE``: The name of a module.
  * ``EXPORT_MACRO_NAME``: The name of the export macro for ``MODULE``.
  * ``EXPORT_FILE_NAME``: The name of the header file which defines ``EXPORT_MACRO_NAME``
    for ``MODULE``.
  * ``REGISTRAR_HEADER``: This file will contain declaration of regsitrar function for ``MODULE``.
  * ``REGISTRAR_SOURCE``: This file will contain implementation of regsitrar function for ``MODULE``.
  * ``SERDES_SOURCES``: This variable holds the list of generated source files with vtkWrapSerDes
    for all classes in ``MODULE``.

#]==]
function (vtk_module_serdes)
  cmake_parse_arguments(PARSE_ARGV 0 _vtk_serdes
    ""
    "MODULE;EXPORT_MACRO_NAME;EXPORT_FILE_NAME;REGISTRAR_HEADER;REGISTRAR_SOURCE;SERDES_SOURCES"
    "")

  if (_vtk_serdes_UNPARSED_ARGUMENTS)
    message(FATAL_ERROR
      "Unparsed arguments for vtk_module_serdes: "
      "${_vtk_serdes_UNPARSED_ARGUMENTS}")
  endif ()

  if (NOT _vtk_serdes_MODULE)
    message(FATAL_ERROR "No module was specified!")
  endif ()

  if (NOT _vtk_serdes_EXPORT_MACRO_NAME)
    message(FATAL_ERROR "No export macro name was specified!")
  endif ()

  if (NOT _vtk_serdes_EXPORT_FILE_NAME)
    message(FATAL_ERROR "No export file name was specified!")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_HEADER)
    message(FATAL_ERROR "No registrar header file name was specified!")
  endif ()

  if (NOT _vtk_serdes_REGISTRAR_SOURCE)
    message(FATAL_ERROR "No registrar source file name was specified!")
  endif ()

  if (NOT _vtk_serdes_SERDES_SOURCES)
    message(FATAL_ERROR "No serdes sources variable name was specified!")
  endif ()

  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "exclude_wrap"
    VARIABLE  _vtk_serdes_exclude_wrap)
  if (_vtk_serdes_exclude_wrap)
    return ()
  endif ()

  _vtk_module_get_module_property("${_vtk_serdes_MODULE}"
    PROPERTY  "include_marshal"
    VARIABLE  _vtk_serdes_include_marshal)
  if (NOT _vtk_serdes_include_marshal)
    return ()
  endif ()

  set(_vtk_serdes_sources)
  _vtk_module_serdes_generate_sources(
    MODULE                "${_vtk_serdes_MODULE}"
    SERIALIZED_CLASSES    _vtk_serdes_classes
    SERDES_SOURCES        _vtk_serdes_sources)

  if (NOT _vtk_serdes_sources)
    return ()
  endif ()

  vtk_module_generate_library_serdes_registrar(
    MODULE             ${_vtk_serdes_MODULE}
    EXPORT_MACRO_NAME  "${_vtk_serdes_EXPORT_MACRO_NAME}"
    EXPORT_FILE_NAME   "${_vtk_serdes_EXPORT_FILE_NAME}"
    REGISTRAR_HEADER   "${_vtk_serdes_REGISTRAR_HEADER}"
    REGISTRAR_SOURCE   "${_vtk_serdes_REGISTRAR_SOURCE}"
    CLASSES            ${_vtk_serdes_classes})

  set("${_vtk_serdes_SERDES_SOURCES}"
    "${_vtk_serdes_sources}"
    PARENT_SCOPE)
endfunction()