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Annotation of coherent/f/usr/include.78/sys/malloc.h, revision 1.1

1.1     ! root        1: /* (-lgl
        !             2:  *     COHERENT Version 4.0.2
        !             3:  *     Copyright (c) 1982, 1993 by Mark Williams Company.
        !             4:  *     All rights reserved. May not be copied without permission.
        !             5:  -lgl) */
        !             6: /*
        !             7:  * /usr/include/sys/malloc.h
        !             8:  * Header file for malloc.c, notmem.c, realloc.c.
        !             9:  */
        !            10: 
        !            11: #ifndef        __SYS_MALLOC_H__
        !            12: #define        __SYS_MALLOC_H__
        !            13: 
        !            14: /* Manifest constants. */
        !            15: /*
        !            16:  * N.B. 1<<ARENASIZE must be greater than sizeof(struct mblock)
        !            17:  * so that malloc.c/newarena() does not cause trouble when it combines arenas.
        !            18:  */
        !            19: #if    _I386
        !            20: #define        ARENASIZE       12      /* round arena sizes up to 1<<12==4096  */
        !            21: #define        BLOCKSIZE       2       /* round block sizes up to 1<<2==4      */
        !            22: #else
        !            23: #define        ARENASIZE       11      /* round arena sizes up to 1<<11==2048  */
        !            24: #define        BLOCKSIZE       1       /* round block sizes up to 1<<1==2      */
        !            25: #endif
        !            26: #define        ALIGNMENT (1<<BLOCKSIZE) /* maximum alignment for any data type */
        !            27: #define        BADSBRK   ((char *)-1)  /* sbrk() failure return value          */
        !            28: #define        DECRSIZE        4096    /* arena size decrement at end          */
        !            29: #define        FREE            1       /* free block marker                    */
        !            30: #define        LEASTFREE (2*sizeof(unsigned))  /* free nothing smaller         */
        !            31: 
        !            32: /* Macros. */
        !            33: #define        bumpp(p,n)      (((char *)(p))+(n))     /* bump pointer p by n bytes */
        !            34: #define        isfree(x)       (((unsigned)(x))&FREE)
        !            35: #define        mblockp(p)      ((char *)(p)-sizeof(unsigned))  /* convert malloc ptr */
        !            36: #define        realsize(x)     ((x) & ~FREE)
        !            37: #define        roundup(i,j)    (((i) + (1 << (j)) - 1) & ~((1 << (j)) - 1))
        !            38: 
        !            39: /* Memory block structure. */
        !            40: typedef        struct  mblock  {
        !            41:        unsigned blksize;
        !            42:        union {
        !            43:                char     *next;
        !            44:                unsigned usera[];
        !            45:        } uval;
        !            46: } MBLOCK;
        !            47: 
        !            48: /* Globals common to malloc/realloc/memok/notmem. */
        !            49: extern unsigned __a_count;
        !            50: extern MBLOCK  *__a_scanp, *__a_first, *__a_top;
        !            51: 
        !            52: #endif
        !            53: 
        !            54: /* end of /usr/include/sys/malloc.h */

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