Systems and methods for generating synthesizable code representing first-in first-out (FIFO) memories may be used to produce FIFO memories for multi-threaded processing. A single FIFO memory is shared between the threads to conserve die area, however each thread may be executed independently, as if each thread has a dedicated FIFO memory. A synthesizable code generator produces synthesizable code for a sender interface, storage, receiver interface, and other features that are specified by a programmer. The other features may reduce power consumption or improve timing. The code generator is used to efficiently produce different variations of FIFO memories.