The MM library is a 2-layer abstraction library which simplifies the usage of shared memory between forked (and this way strongly related) processes under Unix platforms. On the first (lower) layer it hides all platform dependent implementation details (allocation and locking) when dealing with shared memory segments and on the second (higher) layer it provides a high-level malloc(3)-style API for a convenient and well known way to work with data-structures inside those shared memory segments.