Function winapi::um::fileapi::GetDiskFreeSpaceA

pub unsafe extern "system" fn GetDiskFreeSpaceA(
    lpRootPathName: LPCSTR, 
    lpSectorsPerCluster: LPDWORD, 
    lpBytesPerSector: LPDWORD, 
    lpNumberOfFreeClusters: LPDWORD, 
    lpTotalNumberOfClusters: LPDWORD
) -> BOOL