Call Reentrant Code in a Multithreaded Environment

To call reentrant code, create a main function that:

• Includes the header file primary_function_name.h.

• For each thread, allocates memory for the global memory allocation structure primary_function_nameStackData.

• If the algorithm uses persistent or global data, allocates memory for the global structure primary_function_namePersistentData. If the threads communicate, allocate this memory once for the root process. Otherwise, you can allocate memory per thread.

• Contains a thread function that calls these functions:

  • primary_function_name_initialize.

  • primary_function_name.

  • primary_function_name_terminate.

  When you convert a MATLAB^® function to a C/C++ library function or a C/C++ executable, MATLAB Coder™ generates two housekeeping functions. Call these functions in the code that calls the generated C/C++ function. For more information, see Deploy Generated Code.

• Initializes each thread and passes in a pointer to the memory allocation structure as the first parameter to the thread function.

• Frees up the memory used for global structures.

Multithreaded Examples

Type of Reentrant Code	Platform	Reference
Multithreaded without persistent or global data	Windows®	Generate Reentrant C Code from MATLAB Code
	UNIX®	Call Reentrant Code with No Persistent or Global Data (UNIX Only)
Multithreaded with persistent or global data	Windows	Call Reentrant Code — Multithreaded with Persistent Data (Windows Only)
	UNIX	Call Reentrant Code — Multithreaded with Persistent Data (UNIX Only)