Real-Time Workshop

Real-Time malloc Code Format

The real-time malloc code format (corresponding to the generic real-time malloc target) is very similar to the real-time code format. The differences are:

• Real-time malloc declares memory dynamically.

• Note that for blocks provided by the MathWorks, malloc calls are limited to the model initialization code. Generated code is designed to be free from memory leaks, provided that the model termination function is called.

• Real-time malloc allows you to multiply instance the same model with each instance maintaining its own unique data.
• Real-time malloc allows you to combine multiple models together in one executable. For example, to integrate two models into one larger executable, real-time malloc maintains a unique instance of each of the two models. If you do not use the real-time malloc format, the Real-Time Workshop will not necessarily create uniquely named data structures for each model, potentially resulting in name clashes.

• grt_malloc_main.c, the main routine for the generic real-time malloc (grt_malloc) target, supports one model by default. See Combining Multiple Models for information on modifying grt_malloc_main to support multiple models. grt_malloc_main.c is located in the directory matlabroot/rtw/c/grt_malloc.

Unsupported Blocks

The real-time malloc format does not support the following built-in blocks, as shown:

• Functions & Tables
• MATLAB Fcn (note that Simulink Fcn blocks are supported)
• S-Function -- M-file S-functions, Fortran S-functions, or C MEX S-functions that call into MATLAB (Simulink Fcn calls are supported).

System Target Files

• grt_malloc.tlc
• tornado.tlc -- Tornado (VxWorks) real-time target

Template Makefiles

• grt_malloc
• grt_malloc_bc.tmf -- Borland C
• grt_malloc_vc.tmf -- Visual C
• grt_malloc_watc.tmf -- Watcom C
• grt_malloc_lcc.tmf -- LCC compiler
• grt_malloc_unix.tmf -- UNIX host
• tornado.tmf

Real-Time Code Format

S-Function Code Format