atomic/lock free

IPC: ctrl+c, signal, shared memory, socket

IPC methods include pipes and named pipes; message queueing;semaphores; shared memory; and sockets.

condition variable, notify all, notify one, consumer/producer,deadlock/race condition

https://en.wikipedia.org/wiki/Monitor_(synchronization\

notify_all vs notify one:

http://stackoverflow.com/questions/9015748/whats-the-difference-between-notify-all-and-notify-one-of-stdcondition-va

join:

http://stackoverflow.com/questions/15956231/what-does-this-thread-join-code-mean