Alien-Judy

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src/judy-1.0.5/src/JudyL/JudyL.h  view on Meta::CPAN

#endif

// This special Type is merely a sentinel for doing relative calculations.
// This value should not be used in switch statements (to avoid allocating code
// for it), which is also why it appears at the end of the enum list.

        cJL_JPIMMED_CAP

} jpL_Type_t;


// RELATED VALUES:

// Index Size (state) for leaf JP, and JP type based on Index Size (state):

#define JL_LEAFINDEXSIZE(jpType) ((jpType)    - cJL_JPLEAF1 + 1)
#define JL_LEAFTYPE(IndexSize)   ((IndexSize) + cJL_JPLEAF1 - 1)


// MAXIMUM POPULATIONS OF LINEAR LEAVES:

#ifndef JU_64BIT // 32-bit

#define J_L_MAXB                (sizeof(Word_t) * 64)
#define ALLOCSIZES { 3, 5, 7, 11, 15, 23, 32, 47, 64, TERMINATOR } // in words.
#define cJL_LEAF1_MAXWORDS               (32)   // max Leaf1 size in words.

// Note:  cJL_LEAF1_MAXPOP1 is chosen such that the index portion is less than
// 32 bytes -- the number of bytes the index takes in a bitmap leaf.

#define cJL_LEAF1_MAXPOP1 \
   ((cJL_LEAF1_MAXWORDS * cJU_BYTESPERWORD)/(1 + cJU_BYTESPERWORD))
#define cJL_LEAF2_MAXPOP1       (J_L_MAXB / (2 + cJU_BYTESPERWORD))
#define cJL_LEAF3_MAXPOP1       (J_L_MAXB / (3 + cJU_BYTESPERWORD))
#define cJL_LEAFW_MAXPOP1 \
           ((J_L_MAXB - cJU_BYTESPERWORD) / (2 * cJU_BYTESPERWORD))

#else // 64-bit

#define J_L_MAXB                (sizeof(Word_t) * 64)
#define ALLOCSIZES { 3, 5, 7, 11, 15, 23, 32, 47, 64, TERMINATOR } // in words.
#define cJL_LEAF1_MAXWORDS       (15)   // max Leaf1 size in words.

#define cJL_LEAF1_MAXPOP1 \
   ((cJL_LEAF1_MAXWORDS * cJU_BYTESPERWORD)/(1 + cJU_BYTESPERWORD))
#define cJL_LEAF2_MAXPOP1       (J_L_MAXB / (2 + cJU_BYTESPERWORD))
#define cJL_LEAF3_MAXPOP1       (J_L_MAXB / (3 + cJU_BYTESPERWORD))
#define cJL_LEAF4_MAXPOP1       (J_L_MAXB / (4 + cJU_BYTESPERWORD))
#define cJL_LEAF5_MAXPOP1       (J_L_MAXB / (5 + cJU_BYTESPERWORD))
#define cJL_LEAF6_MAXPOP1       (J_L_MAXB / (6 + cJU_BYTESPERWORD))
#define cJL_LEAF7_MAXPOP1       (J_L_MAXB / (7 + cJU_BYTESPERWORD))
#define cJL_LEAFW_MAXPOP1 \
           ((J_L_MAXB - cJU_BYTESPERWORD) / (2 * cJU_BYTESPERWORD))

#endif // 64-bit


// MAXIMUM POPULATIONS OF IMMEDIATE JPs:
//
// These specify the maximum Population of immediate JPs with various Index
// Sizes (== sizes of remaining undecoded Index bits).  Since the JP Types enum
// already lists all the immediates in order by state and size, calculate these
// values from it to avoid redundancy.

#define cJL_IMMED1_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 1)        // 3 [7].
#define cJL_IMMED2_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 2)        // 1 [3].
#define cJL_IMMED3_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 3)        // 1 [2].

#ifdef JU_64BIT
#define cJL_IMMED4_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 4)        //   [1].
#define cJL_IMMED5_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 5)        //   [1].
#define cJL_IMMED6_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 6)        //   [1].
#define cJL_IMMED7_MAXPOP1  ((cJU_BYTESPERWORD - 1) / 7)        //   [1].
#endif


// ****************************************************************************
// JUDYL LEAF BITMAP (JLLB) SUPPORT
// ****************************************************************************
//
// Assemble bitmap leaves out of smaller units that put bitmap subexpanses
// close to their associated pointers.  Why not just use a bitmap followed by a
// series of pointers?  (See 4.27.)  Turns out this wastes a cache fill on
// systems with smaller cache lines than the assumed value cJU_WORDSPERCL.

#define JL_JLB_BITMAP(Pjlb, Subexp)  ((Pjlb)->jLlb_jLlbs[Subexp].jLlbs_Bitmap)
#define JL_JLB_PVALUE(Pjlb, Subexp)  ((Pjlb)->jLlb_jLlbs[Subexp].jLlbs_PValue)

typedef struct J__UDYL_LEAF_BITMAP_SUBEXPANSE
{
        BITMAPL_t jLlbs_Bitmap;
        Pjv_t     jLlbs_PValue;

} jLlbs_t;

typedef struct J__UDYL_LEAF_BITMAP
{
        jLlbs_t jLlb_jLlbs[cJU_NUMSUBEXPL];

} jLlb_t, * PjLlb_t;

// Words per bitmap leaf:

#define cJL_WORDSPERLEAFB1  (sizeof(jLlb_t) / cJU_BYTESPERWORD)


// ****************************************************************************
// MEMORY ALLOCATION SUPPORT
// ****************************************************************************

// ARRAY-GLOBAL INFORMATION:
//
// At the cost of an occasional additional cache fill, this object, which is
// pointed at by a JRP and in turn points to a JP_BRANCH*, carries array-global
// information about a JudyL array that has sufficient population to amortize
// the cost.  The jpm_Pop0 field prevents having to add up the total population
// for the array in insert, delete, and count code.  The jpm_JP field prevents
// having to build a fake JP for entry to a state machine; however, the
// jp_DcdPopO field in jpm_JP, being one byte too small, is not used.
//
// Note:  Struct fields are ordered to keep "hot" data in the first 8 words



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