Provided by: libsdl3-doc_3.2.26+ds-2_all 

NAME
SDL_hid_set_nonblocking - Set the device handle to be non-blocking.
SYNOPSIS
#include <SDL3/SDL_hidapi.h>
int SDL_hid_set_nonblocking(SDL_hid_device *dev, int nonblock);
DESCRIPTION
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.
FUNCTION PARAMETERS
dev a device handle returned from SDL_hid_open().
nonblock
enable or not the nonblocking reads - 1 to enable nonblocking - 0 to disable nonblocking.
RETURN VALUE
for more information.
AVAILABILITY
This function is available since SDL 3.2.0.
Simple Directmedia Layer SDL 3.2.26 SDL_hid_set_nonblocking(3)