getchar_unlocked in windows undeclared

Question

Here is my code:

#include 

void scan(int* i)
{
    int t=0;
    char c;
    bool negative=false;
    c=getchar_unlocked();
    while(c<\'0         


        

Answer 1

Windows have the equivalent, _getchar_nolock, it is Windows specific.

See this link:

https://msdn.microsoft.com/en-us/library/4y2e9z0c.aspx

So if you are happy with a non-threadsafe version and you want the best possible performance you could do something like this:

#ifdef WIN32
// no getchar_unlocked on Windows so call _getchar_nolock
inline int getchar_unlocked() { return _getchar_nolock(); }
#endif