c++ - Semaphore.h without RTOS -

i wondering if can use semaphore , mutex linux os programmed in c++ api semaphore.h.

i not yet in code development/writing phase goal have readout on receiver sends out asynchronous binary data @ baud rate of 115,200. data must relayed modem fast possible.

i thinking using perhaps rtos have no knowledge bootloaders , how linux or other os on chip or embedded environment.

would possible write these read , write functions in separate thread interconnected signals , pipes, addition of semaphore's?

the semaphores required when have format received data in format, parse required strings, or have modify them mathematically. before sending them out.

is possible receive benefits of semaphores when using non-rtos? have seen these being applied in cooperation rtos's.

posix semaphores no less relevant synchronisation in multi-threaded linux applications rtos semaphores in embedded application.