Re: Setting oom_adj on linux?

Alex Hunsaker wrote:
> On Thu, Jan 7, 2010 at 20:26, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> > Alex Hunsaker <badalex(at)gmail(dot)com> writes:
>
> > We can either drop this in core (with a lot of #ifdef LINUX added)
>
> Any thoughts on doing something like (in fork_process.c)
>
> #ifdef LINUX
> void oom_adjust()
> {
> ...
> }
> #else
> void oom_adjust() {}
> #endif
>
> So there is only one #ifdef? It still leaves the ugly calls to the function...

The usual solution for this kind of thing is:

#ifdef LINUX
#define OOM_ADJUST oom_adjust()
#else
#define OOM_ADJUST do {} while (0)
#endif

so there is no call or dummy function and you reference it in the code
as:

OOM_ADJUST;

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