#pragma omp parallel for
for( ; dsvc < dsvc_end; ++dsvc, ++ssvc ) {
    if ( ! *dsvc )
        *dsvc = *ssvc;
}

##</code><code>##

/* Do it. */
#pragma omp parallel for
for( o = 0; o < len; ++o ) {
    if ( ! *( dsvc + o ) )
        *(dsvc+o) = *(ssvc+o);
}

##</code><code>##

                      Rate moritz_inplace dio_openmp swap dio_noopenmp avar_tye_c_inplace avar_c_inplace dio_c
moritz_inplace      1948/s             --       -64% -66%         -68%               -69%           -73%  -83%
dio_openmp          5344/s           174%         --  -7%         -13%               -15%           -26%  -54%
swap                5745/s           195%         8%   --          -6%                -9%           -20%  -50%
dio_noopenmp        6124/s           214%        15%   7%           --                -3%           -15%  -47%
avar_tye_c_inplace  6286/s           223%        18%   9%           3%                 --           -12%  -45%
avar_c_inplace      7178/s           269%        34%  25%          17%                14%             --  -38%
dio_c              11495/s           490%       115% 100%          88%                83%            60%    --