SDL_hid_set_nonblocking - Man Page

#include <SDL3/SDL_hidapi.h>

int SDL_hid_set_nonblocking(SDL_hid_device *dev, int nonblock);

In non-blocking mode calls to SDL_hid_read() will return immediately with a value of 0 if there is no data to be read. In blocking mode, SDL_hid_read() will wait (block) until there is data to read before returning.

Nonblocking can be turned on and off at any time.

dev

a device handle returned from SDL_hid_open().

nonblock

enable or not the nonblocking reads - 1 to enable nonblocking - 0 to disable nonblocking.

for more information.

This function is available since SDL 3.2.0.