What is the aim of making define not to have value?

From: janus <emekamicro@xxxxxxxxx>
Date: Thu, 17 May 2012 09:32:03 -0700 (PDT)

Hello All,

I saw the below in a code I was going through, however I could not make much from it. Why should one have define without values?

#define MUT_RIDX_MAINTHREAD
#define MUT_RIDX_GLOBALS

Regards, \Janus
.

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