LCOV - code coverage report
Current view: top level - util/tmpl - fd_map_chain.c (source / functions) Hit Total Coverage
Test: cov.lcov Lines: 298 299 99.7 %
Date: 2025-09-18 04:41:32 Functions: 657 9175 7.2 %

          Line data    Source code
       1             : /* Generate prototypes, inlines and/or implementations for ultra high
       2             :    performance maps based on hash chains.  A map can store a practically
       3             :    unbounded number of elements but, if sized on creation for the
       4             :    maximum number of mapped elements, typical map operations are a fast
       5             :    O(1) time and map element overhead is a small O(1) space.
       6             : 
       7             :    This API is designed for ultra tight coupling with pools, treaps,
       8             :    heaps, lists, other maps, etc.  Likewise, a map can be persisted
       9             :    beyond the lifetime of the creating process, used concurrently in
      10             :    many common operations, used inter-process, relocated in memory,
      11             :    naively serialized/deserialized, moved between hosts, supports index
      12             :    compression for cache and memory bandwidth efficiency, etc.
      13             : 
      14             :    Memory efficiency and flexible footprint are prioritized.  Elements
      15             :    that are recently queried can be optionally moved to the front of
      16             :    hash chains to adaptively optimize the maps for recent queries in
      17             :    non-concurrent use cases.
      18             : 
      19             :    Typical usage:
      20             : 
      21             :      struct myele {
      22             :        ulong key;  // Technically "MAP_KEY_T MAP_KEY"  (default is ulong key),  do not modify while the element is in the map
      23             :        ulong next; // Technically "MAP_IDX_T MAP_NEXT" (default is ulong next), do not modify while the element is in the map
      24             :        ... key and next can be located arbitrarily in the element and
      25             :        ... can be reused for other purposes when the element is not in a
      26             :        ... map.  The mapping of a key to an element storage index is
      27             :        ... arbitrary but an element should not be moved / released while
      28             :        ... an element is in a map.
      29             : 
      30             :        ... if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL is set to 1, elements
      31             :        ... must also have a prev field.  This field is used to optimize
      32             :        ... removing elements from a chain quickly, if they are pointed
      33             :        ... to by some other index.
      34             :        ulong prev; // Technically "MAP_IDX_T MAP_PREV" (default is ulong prev), do not modify while the element is in the map
      35             :      };
      36             : 
      37             :      typedef struct myele myele_t;
      38             : 
      39             :      #define MAP_NAME  mymap
      40             :      #define MAP_ELE_T myele_t
      41             :      #include "tmpl/fd_map_chain.c"
      42             : 
      43             :    will declare the following APIs as a header only style library in the
      44             :    compilation unit:
      45             : 
      46             :      // mymap_ele_max returns the theoretical maximum number of elements
      47             :      // that can be mapped by a mymap.
      48             : 
      49             :      ulong mymap_ele_max( void );
      50             : 
      51             :      // mymap_chain_max returns the theoretical maximum number possible
      52             :      // chains in a mymap.  Will be an integer power-of-two.
      53             : 
      54             :      ulong mymap_chain_max( void );
      55             : 
      56             :      // mymap_chain_cnt_est returns a reasonable number of chains to use
      57             :      // for a map that is expected to hold up to ele_max_est elements.
      58             :      // ele_max_est will be clamped to be in [1,mymap_ele_max()] and the
      59             :      // return value will be an integer power-of-two in
      60             :      // [1,mymap_chain_max()].
      61             : 
      62             :      ulong mymap_chain_cnt_est( ulong ele_max_est );
      63             : 
      64             :      // mymap_{align,footprint} returns the alignment and footprint
      65             :      // needed for a memory region to be used as a mymap.  align will be
      66             :      // an integer power-of-two and footprint will be a multiple of
      67             :      // align.  footprint returns 0 if chain_cnt is not an integer
      68             :      // power-of-two in [1,mymap_chain_max()].
      69             :      //
      70             :      // mymap_new formats a memory region with the appropriate alignment
      71             :      // and footprint whose first byte in the caller's address space is
      72             :      // pointed by shmem for use as a mymap.  Returns shmem on success
      73             :      // and NULL on failure (logs details).  Caller is not joined on
      74             :      // return.  The map will be empty.
      75             :      //
      76             :      // mymap_join joins a mymap.  Assumes shmap points at a memory
      77             :      // region formatted as a mymap in the caller's address space.
      78             :      // Returns a handle to the caller's local join on success and NULL
      79             :      // on failure (logs details).  Do not assume this is a simple cast
      80             :      // of shmap!
      81             :      //
      82             :      // mymap_leave leaves a mymap.  Assumes join points to a current
      83             :      // local join.  Returns shmap used on join.  Do not assume this is
      84             :      // a simple cast of join!
      85             :      //
      86             :      // mymap_delete unformats a memory region used as a mymap.  Assumes
      87             :      // shmap points to a memory region in the caller's local address
      88             :      // space formatted as a mymap, that there are no joins to the mymap
      89             :      // and that any application cleanup of the entries has already been
      90             :      // done.  Returns shmap on success and NULL on failure.
      91             : 
      92             :      ulong     mymap_align    ( void );
      93             :      ulong     mymap_footprint( ulong chain_cnt );
      94             :      void *    mymap_new      ( void * shmem, ulong chain_cnt, ulong seed );
      95             :      mymap_t * mymap_join     ( void * shmap );
      96             :      void *    mymap_leave    ( mymap_t * join  );
      97             :      void *    mymap_delete   ( void * shmap );
      98             : 
      99             :      // mymap_{chain_cnt,seed} return the values used to construct the
     100             :      // map.  They assume join is a current local join.  The values will
     101             :      // be constant for the map lifetime.
     102             : 
     103             :      ulong mymap_chain_cnt( mymap_t const * join );
     104             :      ulong mymap_seed     ( mymap_t const * join );
     105             : 
     106             :      // mymap_key_{eq,hash} expose the provided MAP_KEY_{EQ,HASH} macros
     107             :      // as inline functions with strict semantics.  They assume that the
     108             :      // provided pointers are in the caller's address space to keys that
     109             :      // will not be changed concurrently.  They retain no interest in
     110             :      // any keys on return.
     111             :      //
     112             :      // mymap_key_eq returns 1 if *k0 and *k1 are equal and 0 otherwise.
     113             :      //
     114             :      // mymap_key_hash returns the hash of *key using the hash function
     115             :      // seed.  Should ideally be a random mapping from MAP_KEY_T to
     116             :      // ulong but this depends on what the user actually passed in for
     117             :      // MAP_KEY_HASH.  The seed used by a particular instance of a map
     118             :      // can be obtained above.
     119             : 
     120             :      int   mymap_key_eq  ( ulong * k0,  ulong * k1 );
     121             :      ulong mymap_key_hash( ulong * key, ulong seed );
     122             : 
     123             :      // mymap_idx_insert inserts an element into the map.  The caller
     124             :      // promises the element is not currently in the map and that
     125             :      // element key is not equal to the key of any other element
     126             :      // currently in the map, except if MAP_MULTI is enabled.  Assumes
     127             :      // there are no concurrent operations on the map.  This always
     128             :      // succeeds.
     129             : 
     130             :      mymap_t *                            // Returns join
     131             :      mymap_idx_insert( mymap_t * join,    // Current local join to element map
     132             :                        ulong     ele_idx, // Index of element to insert
     133             :                        myele_t * pool );  // Current local join to element storage
     134             : 
     135             :      // mymap_idx_remove removes the mapping of a key to an element.
     136             :      // Assumes there are no concurrent operations on the map and that
     137             :      // *key will not be modified during the remove.  The map retains no
     138             :      // interest in key.  On success, the map will no longer have an
     139             :      // interest in the returned element.  On failure, the returned
     140             :      // index lifetime will be that of the sentinel.
     141             : 
     142             :      ulong                                     // Index of removed element on success, sentinel on failure
     143             :      mymap_idx_remove( mymap_t *     join,     // Current local join to element map
     144             :                        ulong const * key,      // Points to the key to remove in the caller's address space
     145             :                        ulong         sentinel, // Value to return if key not in map
     146             :                        myele_t *     pool );   // Current local join to element storage
     147             : 
     148             :      // mymap_idx_query finds the element corresponding to key.  Assumes
     149             :      // there are no concurrent operations on the map and that *key will
     150             :      // not be modified during the query.  The map retains no interest
     151             :      // in key.  On success, the returned index lifetime will be at
     152             :      // least as long as the corresponding element is still in the map.
     153             :      // On failure, the returned index lifetime will be that of the
     154             :      // sentinel.
     155             : 
     156             :      ulong                                    // Index of found element on success, sentinel on failure
     157             :      mymap_idx_query( mymap_t *     join,     // Current local join to the element map
     158             :                       ulong const * key,      // Points to the key to find in the caller's address space
     159             :                       ulong         sentinel, // Value to return on failure
     160             :                       myele_t *     pool );   // Current local join to element storage
     161             : 
     162             :      // mymap_idx_query_const is the same as mymap_idx_query but
     163             :      // supports concurrent queries so long as there no concurrently
     164             :      // running insert/remove/query operations.  The value fields of the
     165             :      // element returned by this function can be changed by the
     166             :      // application but it is up to the application to manage
     167             :      // concurrency between different users modifying the same element.
     168             : 
     169             :      ulong                                            // Index of found element on success, sentinel on failure
     170             :      mymap_idx_query_const( mymap_t const * join,     // Current local join to element map
     171             :                             ulong const *   key,      // Points to the key to find in the caller's address space
     172             :                             ulong           sentinel, // Value to return on failure
     173             :                             myele_t const * pool );   // Current local join to element storage
     174             : 
     175             :      // The mymap_ele_{insert,remove,query,query_const} variants are the
     176             :      // same as the above but use pointers in the caller's address
     177             :      // instead of pool element storage indices.
     178             : 
     179             :      mymap_t *                           // Returns join
     180             :      mymap_ele_insert( mymap_t * join,   // Current local join to element map
     181             :                        myele_t * ele,    // Element to insert (assumed to be in pool)
     182             :                        myele_t * pool ); // Current local join to element storage
     183             : 
     184             :      myele_t *                                 // Removed element on success (will be from pool), sentinel on failure
     185             :      mymap_ele_remove( mymap_t *     join,     // Current local join to element map
     186             :                        ulong const * key,      // Points to the key to remove in the caller's address space
     187             :                        myele_t *     sentinel, // Value to return if key not in map
     188             :                        myele_t *     pool );   // Current local join to element storage
     189             : 
     190             :      myele_t *                                // Found element on success (will be from pool), sentinel on failure
     191             :      mymap_ele_query( mymap_t *     join,     // Current local join to element map
     192             :                       ulong const * key,      // Points to the key to find in the caller's address space
     193             :                       myele_t *     sentinel, // Value to return if key not in map
     194             :                       myele_t *     pool );   // Current local join to element storage
     195             : 
     196             :      myele_t const *                                  // Found element on success (will be from pool), sentinel on failure
     197             :      mymap_ele_query_const( mymap_t const * join,     // Current local join to element map
     198             :                             ulong const *   key,      // Points to the key to find in the caller's address space
     199             :                             myele_t const * sentinel, // Value to return if key not in map
     200             :                             myele_t const * pool );   // Current local join to element storage
     201             : 
     202             :      // mymap_iter_* support fast iteration over all the elements in a
     203             :      // map.  The iteration will be in a random order but the order will
     204             :      // be identical if repeated with no insert/remove/query operations
     205             :      // done in between.  Assumes no concurrent insert/remove/query
     206             :      // operations (query_const is fine).  Example usage:
     207             :      //
     208             :      //   for( mymap_iter_t iter = mymap_iter_init( join, pool );
     209             :      //        !mymap_iter_done( iter, join, pool );
     210             :      //        iter = mymap_iter_next( iter, join, pool ) ) {
     211             :      //     ulong ele_idx = mymap_iter_idx( iter, join, pool );
     212             :      //
     213             :      //     ... process element here
     214             :      //
     215             :      //     ... IMPORTANT!  It is _not_ _safe_ to insert, remove
     216             :      //     ... or query here (query_const is fine).
     217             :      //   }
     218             : 
     219             :      struct mymap_iter_private { ... internal use only ... };
     220             :      typedef struct mymap_iter_private mymap_iter_t;
     221             : 
     222             :      mymap_iter_t    mymap_iter_init     (                    mymap_t const * join, myele_t const * pool );
     223             :      int             mymap_iter_done     ( mymap_iter_t iter, mymap_t const * join, myele_t const * pool );
     224             :      mymap_iter_t    mymap_iter_next     ( mymap_iter_t iter, mymap_t const * join, myele_t const * pool ); // assumes not done
     225             :      ulong           mymap_iter_idx      ( mymap_iter_t iter, mymap_t const * join, myele_t const * pool ); // assumes not done
     226             :      myele_t *       mymap_iter_ele      ( mymap_iter_t iter, mymap_t const * join, myele_t *       pool ); // assumes not done
     227             :      myele_t const * mymap_iter_ele_const( mymap_iter_t iter, mymap_t const * join, myele_t const * pool ); // assumes not done
     228             : 
     229             :      // mymap_verify returns 0 if the mymap is not obviously corrupt or
     230             :      // -1 (i.e. ERR_INVAL) otherwise (logs details).
     231             : 
     232             :      int
     233             :      mymap_verify( mymap_t const * join,    // Current local join to a mymap.
     234             :                    ulong           ele_cnt, // Element storage size, in [0,mymap_ele_max()]
     235             :                    myele_t const * pool );  // Current local join to element storage, indexed [0,ele_cnt)
     236             : 
     237             :    You can do this as often as you like in a compilation unit to get
     238             :    different types of maps.  Variants exist for making header prototypes
     239             :    only and/or implementations if doing a library with multiple
     240             :    compilation units.  Further, options exist to use index compression,
     241             :    different hashing functions, comparison functions, etc as detailed
     242             :    below.
     243             : 
     244             :    If MAP_MULTI is defined to be 1, the map will support multiple
     245             :    entries for the same key. In this case, the existing API works as
     246             :    is, but new methods are provided:
     247             : 
     248             :      ulong                                           // Index of found element on success, sentinel on failure
     249             :      mymap_idx_next_const( ulong           prev,     // Previous result of mymap_idx_query_const
     250             :                            ulong           sentinel, // Value to return on failure
     251             :                            myele_t const * pool );   // Current local join to element storage
     252             : 
     253             :      myele_t const *                                 // Found element on success (will be from pool), sentinel on failure
     254             :      mymap_ele_next_const( myele_t const * prev,     // Previous result of mymap_ele_query_const
     255             :                            myele_t const * sentinel, // Value to return if key not in map
     256             :                            myele_t const * pool );   // Current local join to element storage
     257             : 
     258             :    These take a previous result from query_const (or next_const) and
     259             :    return the next element with the same key in the chain.
     260             : 
     261             :   IF MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL is defined to be 1, the map will
     262             :   support removing elements with a known index from the chain in O(1)
     263             :   time without needing to search for them in the chain.  This requires
     264             :   threading a reverse pointer through the elements in the chain.
     265             : 
     266             :     void
     267             :     mymap_idx_remove_fast( mymap_t * join,    // Current uslocal join to element map
     268             :                            ulong     ele_idx, // Index of element to remove in the element storage
     269             :                            myele_t * pool );  // Current local join to element storage
     270             : 
     271             : */
     272             : 
     273             : #include "fd_map.h"
     274             : 
     275             : /* MAP_NAME gives the API prefix to use for map */
     276             : 
     277             : #ifndef MAP_NAME
     278             : #error "Define MAP_NAME"
     279             : #endif
     280             : 
     281             : /* MAP_ELE_T is the map element type. */
     282             : 
     283             : #ifndef MAP_ELE_T
     284             : #error "Define MAP_ELE_T"
     285             : #endif
     286             : 
     287             : /* MAP_KEY_T is the map key type */
     288             : 
     289             : #ifndef MAP_KEY_T
     290             : #define MAP_KEY_T ulong
     291             : #endif
     292             : 
     293             : /* MAP_KEY is the MAP_ELE_T key field */
     294             : 
     295             : #ifndef MAP_KEY
     296     8692917 : #define MAP_KEY key
     297             : #endif
     298             : 
     299             : /* MAP_IDX_T is the type used for the next field in the MAP_ELE_T.
     300             :    Should be a primitive unsigned integer type.  Defaults to ulong.  A
     301             :    map can't use element stores with more elements than the maximum
     302             :    value that can be represented by a MAP_IDX_T.  (E.g. if ushort, the
     303             :    maximum size element store usable by the map is 65535 elements.) */
     304             : 
     305             : #ifndef MAP_IDX_T
     306        9420 : #define MAP_IDX_T ulong
     307             : #endif
     308             : 
     309             : /* MAP_NEXT is the MAP_ELE_T next field */
     310             : 
     311             : #ifndef MAP_NEXT
     312   535681266 : #define MAP_NEXT next
     313             : #endif
     314             : 
     315             : /* If we're using the optimized random access removal, then we also need
     316             :    a MAP_ELE_T prev field. */
     317             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     318             : #  ifndef MAP_PREV
     319     6006960 : #    define MAP_PREV prev
     320             : #  endif
     321             : #endif
     322             : 
     323             : /* MAP_KEY_EQ returns 0/1 if *k0 is the same/different as *k1 */
     324             : 
     325             : #ifndef MAP_KEY_EQ
     326  5654307951 : #define MAP_KEY_EQ(k0,k1) ((*(k0))==(*(k1)))
     327             : #endif
     328             : 
     329             : /* MAP_KEY_HASH maps *key into ulong uniform pseudo randomly. */
     330             : 
     331             : #ifndef MAP_KEY_HASH
     332     2893239 : #define MAP_KEY_HASH(key,seed) fd_ulong_hash( (*(key)) ^ (seed) )
     333             : #endif
     334             : 
     335             : /* MAP_MAGIC is the magic number to use for the structure to aid in
     336             :    persistent and or IPC usage. */
     337             : 
     338             : #ifndef MAP_MAGIC
     339        1371 : #define MAP_MAGIC (0xf17eda2c37c3a900UL) /* firedancer cmap version 0 */
     340             : #endif
     341             : 
     342             : /* 0 - local use only
     343             :    1 - library header declaration
     344             :    2 - library implementation */
     345             : 
     346             : #ifndef MAP_IMPL_STYLE
     347             : #define MAP_IMPL_STYLE 0
     348             : #endif
     349             : 
     350             : /* 0 - do NOT support multiple values with the same key
     351             :    1 - support multiple values with the same key */
     352             : 
     353             : #ifndef MAP_MULTI
     354             : #define MAP_MULTI 0
     355             : #endif
     356             : 
     357             : /* MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL controls whether the map supports
     358             :    removal of an element in a chain without iterating the whole chain
     359             :    from the beginning. */
     360             : 
     361             : #ifndef MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     362             : #define MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL 0
     363             : #endif
     364             : 
     365             : /* MAP_INSERT_FENCE prevents the compiler from reordering the two
     366             :    operations: setting the next pointer of the new chain head and
     367             :    updating the chain head. */
     368             : 
     369             : #ifndef MAP_INSERT_FENCE
     370             : #define MAP_INSERT_FENCE 0
     371             : #endif
     372             : 
     373             : /* Implementation *****************************************************/
     374             : 
     375             : /* Constructors and verification log details on failure (rest only needs
     376             :    fd_bits.h, consider making logging a compile time option). */
     377             : 
     378             : #include "../log/fd_log.h"
     379             : 
     380 69609854343 : #define MAP_(n) FD_EXPAND_THEN_CONCAT3(MAP_NAME,_,n)
     381             : 
     382             : #if MAP_IMPL_STYLE==0 || MAP_IMPL_STYLE==1 /* need structures and inlines */
     383             : 
     384             : struct MAP_(private) {
     385             : 
     386             :   /* join points here */
     387             : 
     388             :   /* FIXME: consider having an ele_cnt for number of elements in the
     389             :      underlying storage? (probably not) consider having a memo of the
     390             :      chain in which an element is stored and/or using doubly linked
     391             :      chains?  We could do a faster remove by index then. */
     392             : 
     393             :   ulong magic;     /* == MAP_MAGIC */
     394             :   ulong seed;      /* Hash seed, arbitrary */
     395             :   ulong chain_cnt; /* Number of chains, positive integer power-of-two */
     396             : 
     397             :   /* MAP_IDX_T chain[ chain_cnt ] here */
     398             : 
     399             : };
     400             : 
     401             : typedef struct MAP_(private) MAP_(private_t);
     402             : 
     403             : typedef MAP_(private_t) MAP_(t);
     404             : 
     405             : typedef struct fd_map_chain_iter MAP_(iter_t);
     406             : 
     407             : FD_PROTOTYPES_BEGIN
     408             : 
     409             : /* map_private returns the location of the map private for a current
     410             :    local join.  Assumes join is a current local join.  map_private_const
     411             :    is a const correct version. */
     412             : 
     413  1259071174 : FD_FN_CONST static inline MAP_(private_t) *       MAP_(private)      ( MAP_(t) *       join ) { return join; }
     414  2842428835 : FD_FN_CONST static inline MAP_(private_t) const * MAP_(private_const)( MAP_(t) const * join ) { return join; }
     415             : 
     416             : /* map_private_chain returns the location in the caller's address space
     417             :    of the map chains.  Assumes map is valid.  map_private_chain_const is
     418             :    a const correct version. */
     419             : 
     420             : FD_FN_CONST static inline MAP_IDX_T *
     421  1258368134 : MAP_(private_chain)( MAP_(private_t) * map ) {
     422  1258368134 :   return (MAP_IDX_T *)(map+1);
     423  1258368134 : }
     424             : 
     425             : FD_FN_CONST static inline MAP_IDX_T const *
     426  2842428817 : MAP_(private_chain_const)( MAP_(private_t) const * map ) {
     427  2842428817 :   return (MAP_IDX_T const *)(map+1);
     428  2842428817 : }
     429             : 
     430             : /* map_private_chain_idx returns the index of the chain (in
     431             :    [0,chain_cnt) that will contain the element corresponding to key (if
     432             :    present at all) for a map with chain_cnt elements and seed.  Assumes
     433             :    chain_cnt is an integer power-of-two.  Assumes key points to a key is
     434             :    in the caller's address space that will not be changed concurrently.
     435             :    Retains no interest in key on return. */
     436             : 
     437             : FD_FN_PURE static inline ulong
     438             : MAP_(private_chain_idx)( MAP_KEY_T const * key,
     439             :                          ulong             seed,
     440  5370000125 :                          ulong             chain_cnt ) {
     441  5370000125 :   return (MAP_KEY_HASH( (key), (seed) )) & (chain_cnt-1UL);
     442  5370000125 : }
     443             : 
     444             : /* map_private_{box,unbox} compress / decompress 64-bit in-register
     445             :    indices to/from their in-memory representations. */
     446             : 
     447   362856733 : FD_FN_CONST static inline MAP_IDX_T MAP_(private_box)  ( ulong     idx  ) { return (MAP_IDX_T)idx;  }
     448 24209530685 : FD_FN_CONST static inline ulong     MAP_(private_unbox)( MAP_IDX_T cidx ) { return (ulong)    cidx; }
     449             : 
     450             : /* map_private_idx_null returns the element storage index that
     451             :    represents NULL. */
     452             : 
     453  8585346960 : FD_FN_CONST static inline ulong MAP_(private_idx_null)( void ) { return (ulong)(MAP_IDX_T)(~0UL); }
     454             : 
     455             : /* map_private_idx_is_null returns 1 if idx is the NULL map index
     456             :    and 0 otherwise. */
     457             : 
     458 26523607582 : FD_FN_CONST static inline int MAP_(private_idx_is_null)( ulong idx ) { return idx==(ulong)(MAP_IDX_T)(~0UL); }
     459             : 
     460    13868964 : FD_FN_CONST static inline ulong MAP_(ele_max)( void ) { return (ulong)(MAP_IDX_T)(~0UL); }
     461             : 
     462             : FD_FN_CONST static inline ulong
     463    13874316 : MAP_(chain_max)( void ) {
     464    13874316 :   return fd_ulong_pow2_dn( (ULONG_MAX + 1UL - alignof(MAP_(t)) - sizeof(MAP_(t))) / sizeof(MAP_IDX_T) );
     465    13874316 : }
     466             : 
     467             : FD_FN_CONST static inline ulong
     468     6003408 : MAP_(chain_cnt_est)( ulong ele_max_est ) {
     469             : 
     470             :   /* Clamp to be in [1,ele_max] (as ele_max_est 0 is degenerate and as
     471             :      the map is guaranteed to hold at most ele_max keys). */
     472             : 
     473     6003408 :   ele_max_est = fd_ulong_min( fd_ulong_max( ele_max_est, 1UL ), MAP_(ele_max)() );
     474             : 
     475             :   /* Compute the number of chains as the power of 2 that makes the
     476             :      average chain length between ~1 and ~2 when ele_max_est are stored
     477             :      in the map and then clamp to the chain max. */
     478             : 
     479     6003408 :   ulong chain_min = (ele_max_est>>1) + (ele_max_est&1UL); /* chain_min = ceil(ele_max_est/2), in [1,2^63], computed w/o overflow */
     480     6003408 :   ulong chain_cnt = fd_ulong_pow2_up( chain_min );        /* Power of 2 in [1,2^63] */
     481             : 
     482     6003408 :   return fd_ulong_min( chain_cnt, MAP_(chain_max)() );
     483     6003408 : }
     484             : 
     485          12 : FD_FN_PURE static inline ulong MAP_(chain_cnt)( MAP_(t) const * join ) { return MAP_(private_const)( join )->chain_cnt; }
     486           6 : FD_FN_PURE static inline ulong MAP_(seed)     ( MAP_(t) const * join ) { return MAP_(private_const)( join )->seed;      }
     487             : 
     488             : FD_FN_PURE static inline int
     489             : MAP_(key_eq)( MAP_KEY_T const * k0,
     490  5961061625 :               MAP_KEY_T const * k1 ) {
     491  5961061625 :   return !!(MAP_KEY_EQ( (k0), (k1) ));
     492  5961061625 : }
     493             : 
     494             : FD_FN_PURE static inline ulong
     495             : MAP_(key_hash)( MAP_KEY_T const * key,
     496     6001038 :                 ulong             seed ) {
     497     6001038 :   return (MAP_KEY_HASH( (key), (seed) ));
     498     6001038 : }
     499             : 
     500             : FD_FN_PURE static inline MAP_(iter_t)
     501             : MAP_(iter_init)( MAP_(t) const *   join,
     502     3078999 :                  MAP_ELE_T const * pool ) {
     503     3078999 :   (void)pool;
     504             : 
     505     3078999 :   MAP_(private_t) const * map   = MAP_(private_const)( join );
     506     3078999 :   MAP_IDX_T const *       chain = MAP_(private_chain_const)( map );
     507             : 
     508             :   /* Find first element.  If the map is empty, chain_rem will be 0 and
     509             :      ele_idx will be idx_null. */
     510             : 
     511     3078999 :   ulong chain_rem = map->chain_cnt; /* At least 1 */
     512     3078999 :   ulong ele_idx;
     513    16155850 :   do {
     514    16155850 :     ele_idx = MAP_(private_unbox)( chain[ chain_rem-1UL ] );
     515    16155850 :     if( !MAP_(private_idx_is_null)( ele_idx ) ) break;
     516    16155850 :   } while( --chain_rem );
     517             : 
     518     3078999 :   MAP_(iter_t) iter;
     519     3078999 :   iter.chain_rem = chain_rem;
     520     3078999 :   iter.ele_idx   = ele_idx;
     521     3078999 :   return iter;
     522     3078999 : }
     523             : 
     524             : FD_FN_CONST static inline int
     525             : MAP_(iter_done)( MAP_(iter_t)      iter,
     526             :                  MAP_(t) const *   join,
     527   791047644 :                  MAP_ELE_T const * pool ) {
     528   791047644 :   (void)join; (void)pool;
     529   791047644 :   return !iter.chain_rem;
     530   791047644 : }
     531             : 
     532             : FD_FN_PURE static inline MAP_(iter_t)
     533             : MAP_(iter_next)( MAP_(iter_t)      iter,
     534             :                  MAP_(t) const *   join,
     535   787968645 :                  MAP_ELE_T const * pool ) {
     536             : # if FD_TMPL_USE_HANDHOLDING
     537             :   if( FD_UNLIKELY( MAP_(iter_done)( iter, join, pool ) ) ) FD_LOG_CRIT(( "assumes not done" ));
     538             : # endif
     539   787968645 :   ulong chain_rem = iter.chain_rem;
     540   787968645 :   ulong ele_idx   = iter.ele_idx;
     541             : 
     542             :   /* At this point, we are just finished iterating over element ele_idx
     543             :      on chain chain_rem-1 and we already iterated over all elements in
     544             :      chains (chain_rem,chain_cnt] and all elements in chain chain_rem-1
     545             :      before this element.  As such, ele_idx is in [0,ele_cnt) and
     546             :      chain_rem is in (0,chain_cnt].  Get the next element in the chain
     547             :      chain_rem-1. */
     548             : 
     549   787968645 :   ele_idx = MAP_(private_unbox)( pool[ ele_idx ].MAP_NEXT );
     550   787968645 :   if( MAP_(private_idx_is_null)( ele_idx ) ) {
     551             : 
     552             :     /* There were no more elements in chain chain_rem-1.  Find the next
     553             :        chain to start processing.  If all unprocessed chains are empty,
     554             :        then we are done. */
     555             : 
     556   380909938 :     MAP_IDX_T const * chain = MAP_(private_chain_const)( MAP_(private_const)( join ) );
     557   782028536 :     while( --chain_rem ) {
     558   778956206 :       ele_idx = MAP_(private_unbox)( chain[ chain_rem-1UL ] );
     559   778956206 :       if( !MAP_(private_idx_is_null)( ele_idx ) ) break;
     560   778956206 :     }
     561             : 
     562   380909938 :   }
     563             : 
     564   787968645 :   iter.chain_rem = chain_rem;
     565   787968645 :   iter.ele_idx   = ele_idx;
     566   787968645 :   return iter;
     567   787968645 : }
     568             : 
     569             : FD_FN_CONST static inline ulong
     570             : MAP_(iter_idx)( MAP_(iter_t)    iter,
     571             :                 MAP_(t) const * join,
     572   787968162 :                 MAP_ELE_T *     pool ) {
     573             : # if FD_TMPL_USE_HANDHOLDING
     574             :   if( FD_UNLIKELY( MAP_(iter_done)( iter, join, pool ) ) ) FD_LOG_CRIT(( "assumes not done" ));
     575             : # endif
     576   787968162 :   (void)join; (void)pool;
     577   787968162 :   return iter.ele_idx;
     578   787968162 : }
     579             : 
     580             : FD_FN_CONST static inline MAP_ELE_T *
     581             : MAP_(iter_ele)( MAP_(iter_t)    iter,
     582             :                 MAP_(t) const * join,
     583   787968012 :                 MAP_ELE_T *     pool ) {
     584             : # if FD_TMPL_USE_HANDHOLDING
     585             :   if( FD_UNLIKELY( MAP_(iter_done)( iter, join, pool ) ) ) FD_LOG_CRIT(( "assumes not done" ));
     586             : # endif
     587   787968012 :   (void)join;
     588   787968012 :   return pool + iter.ele_idx;
     589   787968012 : }
     590             : 
     591             : FD_FN_CONST static inline MAP_ELE_T const *
     592             : MAP_(iter_ele_const) ( MAP_(iter_t)      iter,
     593             :                        MAP_(t) const *   join,
     594   787968048 :                        MAP_ELE_T const * pool ) {
     595             : # if FD_TMPL_USE_HANDHOLDING
     596             :   if( FD_UNLIKELY( MAP_(iter_done)( iter, join, pool ) ) ) FD_LOG_CRIT(( "assumes not done" ));
     597             : # endif
     598   787968048 :   (void)join;
     599   787968048 :   return pool + iter.ele_idx;
     600   787968048 : }
     601             : 
     602             : FD_PROTOTYPES_END
     603             : 
     604             : #endif
     605             : 
     606             : #if MAP_IMPL_STYLE==1 /* need prototypes */
     607             : 
     608             : FD_PROTOTYPES_BEGIN
     609             : 
     610             : FD_FN_CONST ulong MAP_(align)    ( void );
     611             : FD_FN_CONST ulong MAP_(footprint)( ulong chain_cnt );
     612             : void *            MAP_(new)      ( void * shmem, ulong chain_cnt, ulong seed );
     613             : MAP_(t) *         MAP_(join)     ( void * shmap );
     614             : void *            MAP_(leave)    ( MAP_(t) * join );
     615             : void *            MAP_(delete)   ( void * shmap );
     616             : 
     617             : MAP_(t) *
     618             : MAP_(idx_insert)( MAP_(t) *   join,
     619             :                   ulong       ele_idx,
     620             :                   MAP_ELE_T * pool );
     621             : 
     622             : ulong
     623             : MAP_(idx_remove)( MAP_(t) *         join,
     624             :                   MAP_KEY_T const * key,
     625             :                   ulong             sentinel,
     626             :                   MAP_ELE_T *       pool );
     627             : 
     628             : FD_FN_PURE ulong
     629             : MAP_(idx_query)( MAP_(t) *         join,
     630             :                  MAP_KEY_T const * key,
     631             :                  ulong             sentinel,
     632             :                  MAP_ELE_T *       pool );
     633             : 
     634             : FD_FN_PURE ulong
     635             : MAP_(idx_query_const)( MAP_(t) const *   join,
     636             :                        MAP_KEY_T const * key,
     637             :                        ulong             sentinel,
     638             :                        MAP_ELE_T const * pool );
     639             : 
     640             : #if MAP_MULTI!=0
     641             : 
     642             : FD_FN_PURE ulong
     643             : MAP_(idx_next_const)( ulong             prev,     // Previous result of mymap_idx_query_const
     644             :                       ulong             sentinel, // Value to return on failure
     645             :                       MAP_ELE_T const * pool );   // Current local join to element storage
     646             : 
     647             : #endif /* MAP_MULTI!=0 */
     648             : 
     649             : int
     650             : MAP_(verify)( MAP_(t) const *   join,
     651             :               ulong             ele_cnt,
     652             :               MAP_ELE_T const * pool );
     653             : 
     654             : FD_PROTOTYPES_END
     655             : 
     656             : #else /* need implementations */
     657             : 
     658             : #if MAP_IMPL_STYLE==0 /* local only */
     659             : #define MAP_IMPL_STATIC FD_FN_UNUSED static
     660             : #else
     661             : #define MAP_IMPL_STATIC
     662             : #endif
     663             : 
     664       12954 : FD_FN_CONST MAP_IMPL_STATIC ulong MAP_(align)( void ) { return alignof(MAP_(t)); }
     665             : 
     666             : FD_FN_CONST MAP_IMPL_STATIC ulong
     667        5364 : MAP_(footprint)( ulong chain_cnt ) {
     668        5364 :   if( !(fd_ulong_is_pow2( chain_cnt ) & (chain_cnt<=MAP_(chain_max)())) ) return 0UL;
     669        5328 :   return fd_ulong_align_up( sizeof(MAP_(t)) + chain_cnt*sizeof(MAP_IDX_T), alignof(MAP_(t)) ); /* no overflow */
     670        5364 : }
     671             : 
     672             : MAP_IMPL_STATIC void *
     673             : MAP_(new)( void * shmap,
     674             :            ulong  chain_cnt,
     675        1401 :            ulong  seed ) {
     676             : 
     677        1401 :   if( FD_UNLIKELY( !shmap ) ) {
     678           6 :     FD_LOG_WARNING(( "NULL shmap" ));
     679           6 :     return NULL;
     680           6 :   }
     681             : 
     682        1395 :   if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)shmap, MAP_(align)() ) ) ) {
     683           6 :     FD_LOG_WARNING(( "misaligned shmap" ));
     684           6 :     return NULL;
     685           6 :   }
     686             : 
     687        1389 :   ulong footprint = MAP_(footprint)( chain_cnt );
     688        1389 :   if( FD_UNLIKELY( !footprint ) ) {
     689          18 :     FD_LOG_WARNING(( "bad footprint" ));
     690          18 :     return NULL;
     691          18 :   }
     692             : 
     693             :   /* seed is arbitrary */
     694             : 
     695             :   /* Init the metadata */
     696             : 
     697        1371 :   MAP_(private_t) * map = (MAP_(private_t) *)shmap;
     698             : 
     699        1371 :   map->seed      = seed;
     700        1371 :   map->chain_cnt = chain_cnt;
     701             : 
     702             :   /* Set all the chains to NULL */
     703             : 
     704        1371 :   MAP_IDX_T * chain = MAP_(private_chain)( map );
     705    25418502 :   for( ulong chain_idx=0UL; chain_idx<chain_cnt; chain_idx++ ) chain[ chain_idx ] = MAP_(private_box)( MAP_(private_idx_null)() );
     706             : 
     707        1371 :   FD_COMPILER_MFENCE();
     708        1371 :   FD_VOLATILE( map->magic ) = MAP_MAGIC;
     709        1371 :   FD_COMPILER_MFENCE();
     710             : 
     711        1371 :   return shmap;
     712        1389 : }
     713             : 
     714             : MAP_IMPL_STATIC MAP_(t) *
     715        2049 : MAP_(join)( void * shmap ) {
     716        2049 :   MAP_(private_t) * map = (MAP_(private_t) *)shmap;
     717             : 
     718        2049 :   if( FD_UNLIKELY( !map ) ) {
     719           6 :     FD_LOG_WARNING(( "NULL shmap" ));
     720           6 :     return NULL;
     721           6 :   }
     722             : 
     723        2043 :   if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)map, MAP_(align)() ) ) ) {
     724           6 :     FD_LOG_WARNING(( "misaligned shmap" ));
     725           6 :     return NULL;
     726           6 :   }
     727             : 
     728        2037 :   if( FD_UNLIKELY( map->magic!=MAP_MAGIC ) ) {
     729           6 :     FD_LOG_WARNING(( "bad magic" ));
     730           6 :     return NULL;
     731           6 :   }
     732             : 
     733        2031 :   return (MAP_(t) *)map;
     734        2037 : }
     735             : 
     736             : MAP_IMPL_STATIC void *
     737          21 : MAP_(leave)( MAP_(t) * join ) {
     738             : 
     739          21 :   if( FD_UNLIKELY( !join ) ) {
     740           6 :     FD_LOG_WARNING(( "NULL join" ));
     741           6 :     return NULL;
     742           6 :   }
     743             : 
     744          15 :   return (void *)join;
     745          21 : }
     746             : 
     747             : MAP_IMPL_STATIC void *
     748          24 : MAP_(delete)( void * shmap ) {
     749          24 :   MAP_(private_t) * map = (MAP_(private_t) *)shmap;
     750             : 
     751          24 :   if( FD_UNLIKELY( !map ) ) {
     752           6 :     FD_LOG_WARNING(( "NULL shmap" ));
     753           6 :     return NULL;
     754           6 :   }
     755             : 
     756          18 :   if( FD_UNLIKELY( !fd_ulong_is_aligned( (ulong)map, MAP_(align)() ) ) ) {
     757           6 :     FD_LOG_WARNING(( "misaligned shmap" ));
     758           6 :     return NULL;
     759           6 :   }
     760             : 
     761          12 :   if( FD_UNLIKELY( map->magic!=MAP_MAGIC ) ) {
     762           6 :     FD_LOG_WARNING(( "bad magic" ));
     763           6 :     return NULL;
     764           6 :   }
     765             : 
     766           6 :   FD_COMPILER_MFENCE();
     767           6 :   FD_VOLATILE( map->magic ) = 0UL;
     768           6 :   FD_COMPILER_MFENCE();
     769             : 
     770           6 :   return shmap;
     771          12 : }
     772             : 
     773             : FD_FN_PURE MAP_IMPL_STATIC ulong
     774             : MAP_(idx_query)( MAP_(t) *         join,
     775             :                  MAP_KEY_T const * key,
     776             :                  ulong             sentinel,
     777  1212082794 :                  MAP_ELE_T *       pool ) {
     778  1212082794 :   MAP_(private_t) * map = MAP_(private)( join );
     779             : 
     780             :   /* Find the key */
     781             : 
     782  1212082794 :   MAP_IDX_T * head = MAP_(private_chain)( map ) + MAP_(private_chain_idx)( key, map->seed, map->chain_cnt );
     783  1212082794 :   MAP_IDX_T * cur  = head;
     784  2127545196 :   for(;;) {
     785  2127545196 :     ulong ele_idx = MAP_(private_unbox)( *cur );
     786  2127545196 :     if( FD_UNLIKELY( MAP_(private_idx_is_null)( ele_idx ) ) ) break; /* optimize for found */
     787  1330208079 :     if( FD_LIKELY( MAP_(key_eq)( key, &pool[ ele_idx ].MAP_KEY ) ) ) { /* optimize for found */
     788             :       /* Found, move it to the front of the chain */
     789   414745677 :       if( FD_UNLIKELY( cur!=head ) ) { /* Assume already at head from previous query */
     790             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     791      213354 :         if( FD_UNLIKELY( !MAP_(private_idx_is_null)( pool[ ele_idx ].MAP_NEXT ) ) ) pool[ pool[ ele_idx ].MAP_NEXT ].MAP_PREV = pool[ ele_idx ].MAP_PREV;
     792      213354 :         pool[ ele_idx ].MAP_PREV = MAP_(private_box)( MAP_(private_idx_null)() );
     793      213354 :         pool[ *head   ].MAP_PREV = MAP_(private_box)( ele_idx );
     794             : #endif
     795   289520109 :         *cur = pool[ ele_idx ].MAP_NEXT;
     796   289520109 :         pool[ ele_idx ].MAP_NEXT = *head;
     797   289520109 :         *head = MAP_(private_box)( ele_idx );
     798   289520109 :       }
     799   414745677 :       return ele_idx;
     800   414745677 :     }
     801   915462402 :     cur = &pool[ ele_idx ].MAP_NEXT; /* Retain the pointer to next so we can rewrite it later. */
     802   915462402 :   }
     803             : 
     804             :   /* Not found */
     805             : 
     806   797337117 :   return sentinel;
     807  1212082794 : }
     808             : 
     809             : MAP_IMPL_STATIC MAP_(t) *
     810             : MAP_(idx_insert)( MAP_(t) *   join,
     811             :                   ulong       ele_idx,
     812    21197592 :                   MAP_ELE_T * pool ) {
     813             : # if FD_TMPL_USE_HANDHOLDING && !MAP_MULTI
     814             :   if( FD_UNLIKELY( !MAP_(private_idx_is_null)( MAP_(idx_query)( join, &pool[ ele_idx ].MAP_KEY, MAP_(private_idx_null)(), pool ) ) ) ) {
     815             :     FD_LOG_CRIT(( "ele_idx already in map" ));
     816             :   }
     817             : # endif
     818    21197592 :   MAP_(private_t) * map = MAP_(private)( join );
     819             : 
     820    21197592 :   MAP_IDX_T * head = MAP_(private_chain)( map ) + MAP_(private_chain_idx)( &pool[ ele_idx ].MAP_KEY, map->seed, map->chain_cnt );
     821             : 
     822             : # if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     823    18038922 :   if( FD_UNLIKELY( !MAP_(private_idx_is_null)( *head ) ) ) pool[ *head ].MAP_PREV = MAP_(private_box)( ele_idx );
     824    18038922 :   pool[ ele_idx ].MAP_PREV = MAP_(private_box)( MAP_(private_idx_null)() );
     825             : # endif
     826    21197592 :   pool[ ele_idx ].MAP_NEXT = *head;
     827             : # if MAP_INSERT_FENCE
     828          51 :   FD_COMPILER_MFENCE();
     829             : # endif
     830    21197592 :   *head = MAP_(private_box)( ele_idx );
     831             : 
     832    21197592 :   return join;
     833    21197592 : }
     834             : 
     835             : MAP_IMPL_STATIC ulong
     836             : MAP_(idx_remove)( MAP_(t) *         join,
     837             :                   MAP_KEY_T const * key,
     838             :                   ulong             sentinel,
     839     7774938 :                   MAP_ELE_T *       pool ) {
     840     7774938 :   MAP_(private_t) * map = MAP_(private)( join );
     841             : 
     842             :   /* Find the key */
     843             : 
     844     7774938 :   MAP_IDX_T * cur = MAP_(private_chain)( map ) + MAP_(private_chain_idx)( key, map->seed, map->chain_cnt );
     845    11902695 :   for(;;) {
     846    11902695 :     ulong ele_idx = MAP_(private_unbox)( *cur );
     847    11902695 :     if( FD_UNLIKELY( MAP_(private_idx_is_null)( ele_idx ) ) ) break; /* optimize for found (it is remove after all) */
     848     7284252 :     if( FD_LIKELY( MAP_(key_eq)( key, &pool[ ele_idx ].MAP_KEY ) ) ) { /* " */
     849     3156495 :       *cur = pool[ ele_idx ].MAP_NEXT;
     850             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     851           0 :     if( FD_UNLIKELY( !MAP_(private_idx_is_null)( pool[ ele_idx ].MAP_NEXT ) ) ) pool[ pool[ ele_idx ].MAP_NEXT ].MAP_PREV = pool[ ele_idx ].MAP_PREV;
     852             : #endif
     853     3156495 :       return ele_idx;
     854     3156495 :     }
     855     4127757 :     cur = &pool[ ele_idx ].MAP_NEXT; /* Retain the pointer to next so we can rewrite it later. */
     856     4127757 :   }
     857             : 
     858             :   /* Not found */
     859             : 
     860     4618443 :   return sentinel;
     861     7774938 : }
     862             : 
     863             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     864             : MAP_IMPL_STATIC void
     865             : MAP_(idx_remove_fast)( MAP_(t) *   join,
     866             :                        ulong       ele_idx,
     867    18015850 :                        MAP_ELE_T * pool ) {
     868    18015850 :   MAP_(private_t) * map = MAP_(private)( join );
     869             : 
     870    18015850 :   MAP_ELE_T * ele = pool+ele_idx;
     871             : 
     872    18015850 :   if( FD_UNLIKELY( !MAP_(private_idx_is_null)( ele->MAP_NEXT ) ) )          pool[ ele->MAP_NEXT ].MAP_PREV = ele->MAP_PREV;
     873             : 
     874    18015850 :   if( FD_UNLIKELY( !MAP_(private_idx_is_null)( ele->MAP_PREV ) ) )          pool[ ele->MAP_PREV ].MAP_NEXT = ele->MAP_NEXT;
     875    17311433 :   else { MAP_(private_chain)( map )[ MAP_(private_chain_idx)( &ele->MAP_KEY, map->seed, map->chain_cnt ) ] = ele->MAP_NEXT; }
     876    18015850 : }
     877             : #endif
     878             : 
     879             : FD_FN_PURE MAP_IMPL_STATIC ulong
     880             : MAP_(idx_query_const)( MAP_(t) const *   join,
     881             :                        MAP_KEY_T const * key,
     882             :                        ulong             sentinel,
     883  2450574342 :                        MAP_ELE_T const * pool ) {
     884  2450574342 :   MAP_(private_t) const * map = MAP_(private_const)( join );
     885             : 
     886             :   /* Find the key */
     887             : 
     888  2450574342 :   MAP_IDX_T const * cur = MAP_(private_chain_const)( map ) + MAP_(private_chain_idx)( key, map->seed, map->chain_cnt );
     889  3672865982 :   for(;;) {
     890  3672865982 :     ulong ele_idx = MAP_(private_unbox)( *cur );
     891  3672865982 :     if( FD_UNLIKELY( MAP_(private_idx_is_null)( ele_idx ) ) ) break; /* optimize for found */
     892  3671320631 :     if( FD_LIKELY( MAP_(key_eq)( key, &pool[ ele_idx ].MAP_KEY ) ) ) return ele_idx; /* optimize for found */
     893  1222291640 :     cur = &pool[ ele_idx ].MAP_NEXT;
     894  1222291640 :   }
     895             : 
     896             :   /* Not found */
     897             : 
     898     1545351 :   return sentinel;
     899  2450574342 : }
     900             : 
     901             : #if MAP_MULTI!=0
     902             : 
     903             : FD_FN_PURE MAP_IMPL_STATIC ulong
     904             : MAP_(idx_next_const)( ulong             prev,     // Previous result of mymap_idx_query_const
     905             :                       ulong             sentinel, // Value to return on failure
     906   688807017 :                       MAP_ELE_T const * pool ) {  // Current local join to element storage
     907             :   /* Go to next element in chain */
     908             : 
     909   688807017 :   MAP_ELE_T const * prev_ele = &pool[ prev ];
     910   688807017 :   MAP_IDX_T const * cur = &prev_ele->MAP_NEXT;
     911   928248813 :   for(;;) {
     912   928248813 :     ulong ele_idx = MAP_(private_unbox)( *cur );
     913   928248813 :     if( FD_UNLIKELY( MAP_(private_idx_is_null)( ele_idx ) ) ) break; /* optimize for found */
     914   928248660 :     if( FD_LIKELY( MAP_(key_eq)( &prev_ele->MAP_KEY, &pool[ ele_idx ].MAP_KEY ) ) ) return ele_idx; /* optimize for found */
     915   239441796 :     cur = &pool[ ele_idx ].MAP_NEXT;
     916   239441796 :   }
     917             : 
     918             :   /* Not found */
     919             : 
     920         153 :   return sentinel;
     921   688807017 : }
     922             : 
     923             : #endif /* MAP_MULTI!=0 */
     924             : 
     925             : MAP_IMPL_STATIC int
     926             : MAP_(verify)( MAP_(t) const *   join,
     927             :               ulong             ele_cnt,
     928     7865556 :               MAP_ELE_T const * pool ) {
     929             : 
     930  6948746928 : # define MAP_TEST(c) do {                                                        \
     931  6948746928 :     if( FD_UNLIKELY( !(c) ) ) { FD_LOG_WARNING(( "FAIL: %s", #c )); return -1; } \
     932  6948746928 :   } while(0)
     933             : 
     934             :   /* Validate input arguments */
     935             : 
     936     7865556 :   MAP_TEST( join );
     937     7865550 :   MAP_TEST( ele_cnt<=MAP_(ele_max)() );
     938     7865544 :   MAP_TEST( (!!pool) | (!ele_cnt) );
     939             : 
     940             :   /* Validate metadata */
     941             : 
     942     7865538 :   MAP_(private_t) const * map = MAP_(private_const)( join );
     943             : 
     944     7865538 :   MAP_TEST( map->magic==MAP_MAGIC );
     945             : 
     946     7865538 :   ulong seed = map->seed;
     947             :   /* seed is arbitrary */
     948             : 
     949     7865538 :   ulong chain_cnt = map->chain_cnt;
     950     7865538 :   MAP_TEST( fd_ulong_is_pow2( chain_cnt ) );
     951     7865538 :   MAP_TEST( chain_cnt<=MAP_(chain_max)()  );
     952             : 
     953             :   /* Visit each map entry, doing simple chain integrity checks */
     954             : 
     955     7865538 :   MAP_IDX_T const * chain = MAP_(private_chain_const)( map );
     956             : 
     957     7865538 :   ulong rem = ele_cnt; /* We can visit at most ele_cnt elements */
     958  6289750170 :   for( ulong chain_idx=0UL; chain_idx<chain_cnt; chain_idx++ ) {
     959  6281884632 :     ulong prev_ele = MAP_(private_idx_null)();
     960  6281884632 :     (void)prev_ele;
     961  6281884632 :     for( ulong ele_idx = MAP_(private_unbox)( chain[ chain_idx ] );
     962  7942943649 :          !MAP_(private_idx_is_null)( ele_idx );
     963  6281884632 :          ele_idx = MAP_(private_unbox)( pool[ ele_idx ].MAP_NEXT ) ) {
     964  1661059017 :       MAP_TEST( rem ); rem--;                                                                      /* Check for cycles */
     965  1661059017 :       MAP_TEST( ele_idx<ele_cnt );                                                                 /* Check valid element index */
     966  1661059017 :       MAP_TEST( MAP_(private_chain_idx)( &pool[ ele_idx ].MAP_KEY, seed, chain_cnt )==chain_idx ); /* Check in correct chain */
     967             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
     968   257317596 :       MAP_TEST( pool[ ele_idx ].MAP_PREV==prev_ele );
     969   257317596 :       prev_ele = ele_idx;
     970   257317596 : #endif
     971   257317596 :     }
     972  6281884632 :   }
     973             : 
     974             :   /* At this point, we know that there are no cycles in the map chains,
     975             :      all indices are inbounds and elements are in the correct chains for
     976             :      probes.  It is possible for there to be keys that have been
     977             :      inserted more than once though.  We visit all the nodes a second
     978             :      time and make sure each probe resolves to itself to prove the key
     979             :      of every element in the map is unique.  (We could do this faster if
     980             :      we could tag the elements but this verify is written to not modify
     981             :      any memory.) */
     982             : 
     983  6289750170 :   for( ulong chain_idx=0UL; chain_idx<chain_cnt; chain_idx++ )
     984  6281884632 :     for( ulong ele_idx = MAP_(private_unbox)( chain[ chain_idx ] );
     985  7942943649 :          !MAP_(private_idx_is_null)( ele_idx );
     986  6281884632 :          ele_idx = MAP_(private_unbox)( pool[ ele_idx ].MAP_NEXT ) ) {
     987             : #if MAP_MULTI==0
     988  1044314310 :       MAP_TEST( MAP_(idx_query_const)( join, &pool[ ele_idx ].MAP_KEY, ULONG_MAX, pool )==ele_idx );
     989             : #else
     990             :       ulong idx2;
     991   616744707 :       for (idx2 = MAP_(idx_query_const)( join, &pool[ ele_idx ].MAP_KEY, ULONG_MAX, pool );
     992  1046107332 :            idx2 != ULONG_MAX && idx2 != ele_idx;
     993   429362625 :            idx2 = MAP_(idx_next_const)( idx2, ULONG_MAX, pool )) ;
     994   616744707 :       MAP_TEST( idx2 == ele_idx );
     995             : #endif
     996  1661059017 :     }
     997             : 
     998     7865538 : # undef MAP_TEST
     999             : 
    1000     7865538 :   return 0;
    1001     7865538 : }
    1002             : 
    1003             : #undef MAP_IMPL_STATIC
    1004             : 
    1005             : #endif
    1006             : 
    1007             : #if MAP_IMPL_STYLE==0 || MAP_IMPL_STYLE==1 /* need inlines */
    1008             : 
    1009             : FD_PROTOTYPES_BEGIN
    1010             : 
    1011             : static inline MAP_(t) *
    1012             : MAP_(ele_insert)( MAP_(t) *   join,
    1013             :                   MAP_ELE_T * ele,
    1014    16744404 :                   MAP_ELE_T * pool ) {
    1015    16744404 :   return MAP_(idx_insert)( join, (ulong)(ele-pool), pool );
    1016    16744404 : }
    1017             : 
    1018             : static inline MAP_ELE_T *
    1019             : MAP_(ele_remove)( MAP_(t) *         join,
    1020             :                   MAP_KEY_T const * key,
    1021             :                   MAP_ELE_T *       sentinel,
    1022     7680333 :                   MAP_ELE_T *       pool ) {
    1023     7680333 :   ulong ele_idx = MAP_(idx_remove)( join, key, MAP_(private_idx_null)(), pool );
    1024     7680333 :   return fd_ptr_if( !MAP_(private_idx_is_null)( ele_idx ), (MAP_ELE_T       *)( (ulong)pool + (ele_idx * sizeof(MAP_ELE_T)) ), sentinel );
    1025     7680333 : }
    1026             : 
    1027             : #if MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
    1028             : static inline MAP_ELE_T *
    1029             : MAP_(ele_remove_fast)( MAP_(t) *   join,
    1030             :                        MAP_ELE_T * ele,
    1031    13583191 :                        MAP_ELE_T * pool  ) {
    1032    13583191 :   MAP_(idx_remove_fast)( join, (ulong)(ele-pool), pool );
    1033    13583191 :   return ele;
    1034    13583191 : }
    1035             : #endif
    1036             : 
    1037             : FD_FN_PURE static inline MAP_ELE_T *
    1038             : MAP_(ele_query)( MAP_(t) *         join,
    1039             :                  MAP_KEY_T const * key,
    1040             :                  MAP_ELE_T *       sentinel,
    1041  1203163068 :                  MAP_ELE_T *       pool ) {
    1042  1203163068 :   ulong ele_idx = MAP_(idx_query)( join, key, MAP_(private_idx_null)(), pool );
    1043  1203163068 :   return fd_ptr_if( !MAP_(private_idx_is_null)( ele_idx ), (MAP_ELE_T       *)( (ulong)pool + (ele_idx * sizeof(MAP_ELE_T)) ), sentinel );
    1044  1203163068 : }
    1045             : 
    1046             : FD_FN_PURE static inline MAP_ELE_T const *
    1047             : MAP_(ele_query_const)( MAP_(t) const *   join,
    1048             :                        MAP_KEY_T const * key,
    1049             :                        MAP_ELE_T const * sentinel,
    1050   789505284 :                        MAP_ELE_T const * pool ) {
    1051   789505284 :   ulong ele_idx = MAP_(idx_query_const)( join, key, MAP_(private_idx_null)(), pool );
    1052   789505284 :   return fd_ptr_if( !MAP_(private_idx_is_null)( ele_idx ), (MAP_ELE_T const *)( (ulong)pool + (ele_idx * sizeof(MAP_ELE_T)) ), sentinel );
    1053   789505284 : }
    1054             : 
    1055             : #if MAP_MULTI!=0
    1056             : 
    1057             : FD_FN_PURE static inline MAP_ELE_T const *        // Found element on success (will be from pool), sentinel on failure
    1058             : MAP_(ele_next_const)( MAP_ELE_T const * prev,     // Previous result of mymap_ele_query_const
    1059             :                       MAP_ELE_T const * sentinel, // Value to return if key not in map
    1060   259444236 :                       MAP_ELE_T const * pool ) {  // Current local join to element storage
    1061   259444236 :          ulong ele_idx = MAP_(idx_next_const)( (ulong)(prev-pool), MAP_(private_idx_null)(), pool );
    1062   259444236 :   return fd_ptr_if( !MAP_(private_idx_is_null)( ele_idx ), pool + ele_idx, sentinel );
    1063   259444236 : }
    1064             : 
    1065             : #endif /* MAP_MULTI!=0 */
    1066             : 
    1067             : FD_PROTOTYPES_END
    1068             : 
    1069             : #endif
    1070             : 
    1071             : #undef MAP_
    1072             : 
    1073             : #undef MAP_IMPL_STYLE
    1074             : #undef MAP_MAGIC
    1075             : #undef MAP_KEY_HASH
    1076             : #undef MAP_KEY_EQ
    1077             : #undef MAP_NEXT
    1078             : #undef MAP_PREV
    1079             : #undef MAP_IDX_T
    1080             : #undef MAP_KEY
    1081             : #undef MAP_KEY_T
    1082             : #undef MAP_ELE_T
    1083             : #undef MAP_NAME
    1084             : #undef MAP_MULTI
    1085             : #undef MAP_OPTIMIZE_RANDOM_ACCESS_REMOVAL
    1086             : #undef MAP_INSERT_FENCE

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