_conio_kbhit

Syntax

#include <conio.h> int _conio_kbhit(void);

Description

Determines whether or not a character is waiting at the keyboard. If there is an ungetch'd character, this function returns true. Note that if you include conio.h, the kbhit (see section kbhit) function is redefined to be this function instead.

Return Value

Nonzero if a key is waiting, else zero.

Portability

ANSI/ISO C	No
POSIX	No

Implementation Note

It's not safe to call this function inside static constructors, because conio needs to be initialized, and its initialization is done by a static constructor. Since you don't have any control on the order in which static constructors are called (it's entirely up to the linker), you could have problems.

If you can detect the situation when one of the conio functions is called for the very first time since program start, you could work around this problem by calling the gppconio_init function manually (this is the function called by a static constructor).