last = ctx->output_filter(ctx->filter_ctx, out);⏎
⏎
        if (last == NGX_ERROR || last == NGX_DONE) {⏎
            return last;⏎
        }⏎
⏎
        ngx_chain_update_chains(ctx->pool, &ctx->free, &ctx->busy, &out,⏎
                                ctx->tag);⏎
        last_out = &out;⏎
    }⏎
}⏎
⏎
⏎
static ngx_inline ngx_int_t⏎
ngx_output_chain_as_is(ngx_output_chain_ctx_t *ctx, ngx_buf_t *buf)⏎
{⏎
    ngx_uint_t  sendfile;⏎
⏎
    if (ngx_buf_special(buf)) {⏎
        return 1;⏎
    }⏎
⏎
#if (NGX_THREADS)⏎
    if (buf->in_file) {⏎
        buf->file->thread_handler = ctx->thread_handler;⏎
        buf->file->thread_ctx = ctx->filter_ctx;⏎
    }⏎
#endif⏎
⏎
    if (buf->in_file && buf->file->directio) {⏎
        return 0;⏎
    }⏎
⏎
    sendfile = ctx->sendfile;⏎
⏎
#if (NGX_SENDFILE_LIMIT)⏎
⏎
    if (buf->in_file && buf->file_pos >= NGX_SENDFILE_LIMIT) {⏎
        sendfile = 0;⏎
    }⏎
⏎
#endif⏎
⏎
    if (!sendfile) {⏎
⏎
        if (!ngx_buf_in_memory(buf)) {⏎
            return 0;⏎
        }⏎
⏎
        buf->in_file = 0;⏎
    }⏎
⏎
#if (NGX_HAVE_AIO_SENDFILE)⏎
    if (ctx->aio_preload && buf->in_file) {⏎
        (void) ngx_output_chain_aio_setup(ctx, buf->file);⏎
    }⏎
#endif⏎
⏎
    if (ctx->need_in_memory && !ngx_buf_in_memory(buf)) {⏎
        return 0;⏎
    }⏎
⏎
    if (ctx->need_in_temp && (buf->memory || buf->mmap)) {⏎
        return 0;⏎
    }⏎
⏎
    return 1;⏎
}⏎