Get a character from stdin
#include <stdio.h> int getchar_unlocked( void );
Use the -l c option to qcc to link against this library. This library is usually included automatically.
The getchar_unlocked() function is a thread-unsafe version of getchar() . You can use it safely only when the invoking thread has locked stdin using flockfile() (or ftrylockfile() ) and funlockfile() .
The next character from the input stream pointed to by stdin, cast as (int)(unsigned char), or EOF if an end-of-file or error condition occurs (errno is set).