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copied!<p>It is permitted to have a lot of macros. Why does that trouble you?</p> <p>A macro like </p> <pre><code> #define STRUCT_KFIFO_PTR(type) \ struct __STRUCT_KFIFO_PTR(type, 0, type) </code></pre> <p>is not a function-like macro.</p> <p>A macro like </p> <pre><code> #define kfifo_initialized(fifo) ((fifo)->kfifo.mask) </code></pre> <p>could be also used on the left side of some assignment (even if you probably should not do that). And it is shorter to write than the corresponding <code>inline</code> function</p> <pre><code> static inline unsigned kfifo_initialezed_f(struct __kfifo *fifo) { return fifo->kfifo.mask; } </code></pre> <p>and more importantly the macro <code>kfifo_initialized</code> would work with several different declarations of its <code>fifo</code> actual argument (it is "generic" in some limited sense).</p> <p>A macro like</p> <pre><code> #define __STRUCT_KFIFO(type, size, recsize, ptrtype) \ { \ __STRUCT_KFIFO_COMMON(type, recsize, ptrtype); \ type buf[((size < 2) || (size & (size - 1))) ? -1 : size]; \ } </code></pre> <p>would expand to a declaration equivalent to an array <code>buf[-1]</code> if given a <code>size</code> of <code>3</code> and that would make the compiler yell. (The recent C++2011 standard also has <code>static_assert</code> for such purposes).</p> <p>So I don't understand why you are surprised. The <em>C</em> preprocessor is useful (IMHO it is even not powerful enough). Why avoid using it?</p> <p>This is <strong>free software</strong>; if you don't like that source file, you could <strong>work to improve it</strong> (and that would take time) to propose a better solution. I do like the current one.</p>

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