Main Content

Use dynamic memory allocation for model block instantiation

Whether to allocate dynamic memory for instantiating objects for reference models configured with C++ class interface

Model Configuration Pane: Code Generation / Interface

Description

The Use dynamic memory allocation for model block instantiation parameter specifies whether generated code uses the operator new, during model object registration, to instantiate objects for referenced models that are configured with a C++ class interface.

Dependencies

To enable this parameter, set:

  • Language to C++

  • Code interface packaging to C++ class.

Settings

Off (default) | On
On

Enables generation of code that uses dynamic memory allocation to instantiate objects for referenced models configured with a C++ class interface. During instantiation of an object for the top model in a model hierarchy, the generated code uses new to instantiate objects for referenced models.

Selecting this parameter frees a parent model from having to maintain information about referenced models beyond its direct children.

  • If you select this parameter and an out-of-memory error occurs during the use of new, be aware that the code generator might throw a bad_alloc exception, per the C++ standard. You must provide code to catch and process the bad_alloc exception in case an out-of-memory error occurs for a new call during construction of the top model object.

  • If you select this parameter and the base model contains a Model block, the build process might generate copy constructor and assignment operator functions in the private section of the model class. Those functions prevent pointer members within the model class from being copied by other code.

Off

Disables generation of code that uses new to instantiate referenced model objects.

If you clear this parameter, a parent model maintains information about its referenced models, including its direct and indirect children.

Recommended Settings

ApplicationSetting
DebuggingNo impact
TraceabilityNo impact
EfficiencyOn
Safety precaution

No recommendation

Programmatic Use

Parameter: UseOperatorNewForModelRefRegistration
Type: character vector
Value: 'on' | 'off'
Default: 'off'

Version History

Introduced in R2009b

See Also

Topics