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Annotation of xinu/h/sem.h, revision 1.1.1.1

1.1       root        1: /* sem.h - isbadsem */
                      2: 
                      3: #ifndef        NSEM
                      4: #define        NSEM            100     /* number of semaphores, if not defined */
                      5: #endif
                      6: 
                      7: #define        SFREE   '\01'           /* this semaphore is free               */
                      8: #define        SUSED   '\02'           /* this semaphore is used               */
                      9: 
                     10: struct sentry  {               /* semaphore table entry                */
                     11:        char    sstate;         /* the state SFREE or SUSED             */
                     12:        short   semcnt;         /* count for this semaphore             */
                     13:        short   sqhead;         /* q index of head of list              */
                     14:        short   sqtail;         /* q index of tail of list              */
                     15: };
                     16: extern struct  sentry  semaph[];
                     17: extern int     nextsem;
                     18: 
                     19: #define        isbadsem(s)     (s<0 || s>=NSEM)

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