sid.h

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#ifndef _SID_H_
#define _SID_H_

#ifndef NDEBUG

#define SID unsigned int sid;
#define SID_set(p, id)  (p->sid = id)
#define SID_del(p)      (p->sid = 0xffffffff)
#define SID_ok(p, id)   (p->sid == id)

#else /* NDEBUG */

#define SID              /* */
#define SID_set(p, sid)  /* */
#define SID_del(p)       /* */
#define SID_ok(p, id)    true

#endif /* NDEBUG */


#endif /* _SID_H_ */