nginx 0.8.16 *) Feature: the "image_filter_transparency" directive. *) Bugfix: "addition_types" directive was incorrectly named "addtion_types". *) Bugfix: resolver cache poisoning. Thanks to Matthew Dempsky. *) Bugfix: memory leak in resolver. Thanks to Matthew Dempsky. *) Bugfix: invalid request line in $request variable was written in access_log only if error_log was set to "info" or "debug" level. *) Bugfix: in PNG alpha-channel support in the ngx_http_image_filter_module. *) Bugfix: nginx always added "Vary: Accept-Encoding" response header line, if both "gzip_static" and "gzip_vary" were on. *) Bugfix: in UTF-8 encoding support by "try_files" directive in nginx/Windows. *) Bugfix: in "post_action" directive usage; the bug had appeared in 0.8.11. Thanks to Igor Artemiev.

/
/ Copyright (C) Igor Sysoev
/

/ ngx_atomic_uint_t ngx_atomic_cmp_set(ngx_atomic_t *lock,
/     ngx_atomic_uint_t old, ngx_atomic_uint_t set);
/
/ the arguments are passed in %rdi, %rsi, %rdx
/ the result is returned in the %rax

        .inline ngx_atomic_cmp_set,0
        movq      %rsi, %rax
        lock
        cmpxchgq  %rdx, (%rdi)
        setz      %al
        movzbq    %al, %rax
        .end


/ ngx_atomic_int_t ngx_atomic_fetch_add(ngx_atomic_t *value,
/     ngx_atomic_int_t add);
/
/ the arguments are passed in %rdi, %rsi
/ the result is returned in the %rax

        .inline ngx_atomic_fetch_add,0
        movq      %rsi, %rax
        lock
        xaddq     %rax, (%rdi)
        .end


/ ngx_cpu_pause()

       .inline ngx_cpu_pause,0
       pause
       .end