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Annotation of coherent/b/lib/libc/gen/malloc/notmem.c, revision 1.1

1.1     ! root        1: /*
        !             2:  * notmem.c
        !             3:  * Test if pointer is in malloc arena.
        !             4:  */
        !             5: 
        !             6: #include <stdio.h>
        !             7: #include <sys/malloc.h>
        !             8: 
        !             9: /*
        !            10:  * Return 1 if cp is not in the malloc arena,
        !            11:  * 0 if cp is in the malloc arena, or
        !            12:  * -1 if trouble is detected in the arena.
        !            13:  * Note that this returns 0 for freed blocks in the arena.
        !            14:  */
        !            15: notmem(cp) char *cp;
        !            16: {
        !            17:        register unsigned len, counter;
        !            18:        register MBLOCK *mp, *ap;
        !            19: 
        !            20:        if (cp == NULL
        !            21:           || (mp = __a_scanp) == NULL
        !            22:           || ((ap = mblockp(cp))->blksize) == 0)
        !            23:                return 1;                       /* obviously bad */
        !            24: 
        !            25:        for (counter = __a_count; counter--; ) {
        !            26:                if (mp == ap)
        !            27:                        return 0;               /* obviously good */
        !            28:                len = mp->blksize;
        !            29:                mp = (len) ? bumpp(mp, realsize(len)) : mp->uval.next;
        !            30:        }
        !            31:        if (mp != __a_scanp)
        !            32:                return -1;                      /* trouble in arena */
        !            33:        return 1;                               /* not found */
        !            34: }

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