mark.h

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/* mark.h - notmarked */

#define MAXMARK 20      /* Maximum number of marked locations   */

extern  int32   *(marks[]);
extern  int32   nmarks;
extern  sid32   mkmutex;
typedef int32   memmark[1]; /* Declare a memory mark to be an array */
                /*   so user can reference the name */
                /*   without a leading &        */

/*------------------------------------------------------------------------
 *  notmarked  -  Return nonzero if a location has not been marked
 *------------------------------------------------------------------------
 */
#define notmarked(L)        (L[0]<0 || L[0]>=nmarks || marks[L[0]]!=L)