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Annotation of coherent/c/usr/include/sys/malloc.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT Version 3.1.0
        !             3:  *     Copyright (c) 1982, 1990 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: /*
        !             7:  * malloc.h
        !             8:  * Header file for malloc.c, notmem.c, realloc.c.
        !             9:  */
        !            10: 
        !            11: #ifndef        MALLOC_H
        !            12: #define        MALLOC_H
        !            13: 
        !            14: /* Manifest constants. */
        !            15: /*
        !            16:  * N.B. 2^ARENASIZE must be greater than sizeof(struct mblock)
        !            17:  * so that malloc.c/newarena() does not cause trouble when it combines arenas.
        !            18:  */
        !            19: #define        ARENASIZE       11      /* round arena sizes up to 2^11==2048   */
        !            20: #define        BADSBRK   ((char *)-1)  /* sbrk() failure return value          */
        !            21: #define        BLOCKSIZE       1       /* round block sizes up to 2^1==2       */
        !            22: #define        DECRSIZE        256     /* arena size decrement at end          */
        !            23: #define        FREE            1       /* free block marker                    */
        !            24: #define        LEASTFREE (2*sizeof(unsigned))  /* free nothing smaller         */
        !            25: 
        !            26: /* Macros. */
        !            27: #define        bumpp(p,n)      (((char *)(p))+(n))     /* bump pointer p by n bytes */
        !            28: #define        isfree(x)       (((unsigned)(x))&FREE)
        !            29: #define        mblockp(p)      ((char *)(p)-sizeof(unsigned))  /* convert malloc ptr */
        !            30: #define        realsize(x)     ((x) & ~FREE)
        !            31: #define        roundup(i,j)    (((i) + (1 << (j)) - 1) & ~((1 << (j)) - 1))
        !            32: 
        !            33: /* Memory block structure. */
        !            34: typedef        struct  mblock  {
        !            35:        unsigned blksize;
        !            36:        union {
        !            37:                char     *next;
        !            38:                unsigned usera[];
        !            39:        } uval;
        !            40: } MBLOCK;
        !            41: 
        !            42: /* Globals common to malloc/realloc/memok/notmem. */
        !            43: extern unsigned __a_count;
        !            44: extern MBLOCK  *__a_scanp, *__a_first;
        !            45: 
        !            46: #endif

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