Memory, Heaps, and Other Libraries

The heap you create in your linker command file becomes the default heap, so it does not need initialization. Additional memory and heap points are:

• To have the system link memory-management code into your code, call malloc() or new().
• Initialize multiple memory pools to form a large heap.
• To create each memory pool, call init_alloc(). (You do not need to initialize the memory pool for the default heap.)

The memory allocation scheme in EWL requires the following symbols to be defined in the LCF file: ___mem_limit and ___stack_safety.

For example,

  ___mem_limit    = ___HEAP_END;
   ___stack_safety = 16;  

You may be able to use another standard C library with CodeWarrior projects. You should check the stdarg.h file in this other standard library and in your runtime libraries. Additional points are:

• The CodeWarrior C and C++ C/C++ compiler generates correct variable-argument functions only with the header file that the EWL include.
• You may find that other implementations are also compatible.
• You may also need to modify the runtime to support a different standard C library; you must include __va_arg.c.
• Other C++ libraries are not compatible.
  Note: If you are working with any kind of embedded OS, you may need to customize EWL to work properly with that OS.