Neutrino offers complete memory protection for user applications and for operating system components (device drivers, filesystems, etc.).
Moreover, QNX reaches the complex POSIX process model in a protected environment using a MMU (Memory Management Unit) mechanism. This protection is useful both for development and for the runtime system.
In conclusion, QNX provides a microkernel architecture with full memory protection between each operating system components such as filesystem, TCP/IP, Qnet and so on. Therefore each process is a address space separated and protected against the rest of components.
QNX provides dynamically request memory allocation using the malloc(), realloc() or calloc() functions, and provides the free() function to release memory allocation.