### Odissey internals

Odissey heavily depends on two libraries, which were originally
been created during its development: [machinarium](https://github.yandex-team.ru/pmwkaa/machinarium) and
[shapito](https://github.yandex-team.ru/pmwkaa/shapito).

**Machinarium**

Machinarium extensively used for organization of multi-thread processing and networking IO.
All Odissey threads are run in context of machinarium `machines` - pthreads with coroutine schedulers
placed on top of `epoll(2)`.

Odissey does not directly use or create multi-tasking primitives such as mutexes. All synchronization
is done using message passing and transparently implemented by machinarium.

**Shapito**

Shapito provides resizable buffers (streams) and methods for constructing, reading and validating
PostgreSQL protocol requests. All PostgreSQL specific details should be provided by Shapito library.