From: Ketmar Dark Date: Sun, 17 Sep 2017 06:10:35 +0000 (+0300) Subject: hashtable cosmetic updates X-Git-Url: http://deadsoftware.ru/gitweb?a=commitdiff_plain;h=f924968c450e1dc566b3abdde8d2aeac4de11fd0;p=d2df-sdl.git hashtable cosmetic updates --- diff --git a/src/game/g_triggers.pas b/src/game/g_triggers.pas index 664faf6..f5bf2d2 100644 --- a/src/game/g_triggers.pas +++ b/src/game/g_triggers.pas @@ -237,7 +237,7 @@ begin if (Length(afldname) > 4) and (afldname[1] = 'u') and (afldname[2] = 's') and (afldname[3] = 'e') and (afldname[4] = 'r') then begin - if (me.userVars = nil) then me.userVars := THashStrVariant.Create(hsihash, hsiequ); + if (me.userVars = nil) then me.userVars := THashStrVariant.Create(hashStrHash, hashStrEqu); me.userVars.put(afldname, aval); exit; end; @@ -2447,7 +2447,7 @@ begin // update cached trigger variables trigUpdateCacheData(gTriggers[find_id], gTriggers[find_id].trigDataRec); - gTriggers[find_id].userVars := nil; //THashStrVariant.Create(hsihash, hsiequ); + gTriggers[find_id].userVars := nil; //THashStrVariant.Create(hashStrHash, hashStrEqu); try gTriggers[find_id].exoThink := TExprBase.parseStatList(tgclist, VarToStr(trec.user['exoma_think'])); @@ -3347,7 +3347,7 @@ begin if (uvcount < 0) or (uvcount > 1024*1024) then raise XStreamError.Create('invalid number of user vars in trigger'); if (uvcount > 0) then begin - gTriggers[i].userVars := THashStrVariant.Create(hsihash, hsiequ); + gTriggers[i].userVars := THashStrVariant.Create(hashStrHash, hashStrEqu); vv := Unassigned; while (uvcount > 0) do begin diff --git a/src/shared/hashtable.pas b/src/shared/hashtable.pas index a51fc91..85133c3 100644 --- a/src/shared/hashtable.pas +++ b/src/shared/hashtable.pas @@ -35,11 +35,6 @@ type const LoadFactorPrc = 90; // it is ok for robin hood hashes public - type THashFn = function (constref o: KeyT): LongWord; - type TEquFn = function (constref a, b: KeyT): Boolean; - type TIteratorFn = function (constref k: KeyT; constref v: ValueT): Boolean is nested; // return `true` to stop - type TIteratorExFn = function (constref k: KeyT; constref v: ValueT; keyhash: LongWord): Boolean is nested; // return `true` to stop - type PEntry = ^TEntry; TEntry = record @@ -49,10 +44,20 @@ type private hash: LongWord; // key hash or 0 nextFree: PEntry; // next free entry + private + function getEmpty (): Boolean; inline; public - property keyhash: LongWord read hash; + property empty: Boolean read getEmpty; + property keyhash: LongWord read hash; // cannot be 0 end; + type THashFn = function (constref o: KeyT): LongWord; + type TEquFn = function (constref a, b: KeyT): Boolean; + type TFreeKeyFn = procedure (var k: KeyT); // this may free key + type TFreeValueFn = procedure (var v: ValueT); // this may free value + type TIteratorFn = function (constref k: KeyT; constref v: ValueT): Boolean is nested; // return `true` to stop + type TIteratorExFn = function (constref k: KeyT; constref v: ValueT; keyhash: LongWord): Boolean is nested; // return `true` to stop + private type TEntryArray = array of TEntry; @@ -98,6 +103,8 @@ type private hashfn: THashFn; equfn: TEquFn; + freekeyfn: TFreeKeyFn; + freevalfn: TFreeValueFn; mBuckets: array of PEntry; // entries, points to mEntries elements mBucketsUsed: Integer; mEntries: TEntryArray; @@ -112,14 +119,16 @@ type function allocEntry (): PEntry; procedure releaseEntry (e: PEntry); - //function distToStIdx (idx: LongWord): LongWord; inline; + function distToStIdx (idx: LongWord): LongWord; inline; procedure putEntryInternal (swpe: PEntry); function getCapacity (): Integer; inline; + procedure freeEntries (); + public - constructor Create (ahashfn: THashFn; aequfn: TEquFn); + constructor Create (ahashfn: THashFn; aequfn: TEquFn; afreekeyfn: TFreeKeyFn=nil; afreevalfn: TFreeValueFn=nil); destructor Destroy (); override; procedure clear (); @@ -174,10 +183,13 @@ type type THashIntInt = specialize THashBase; THashStrInt = specialize THashBase; + THashIntStr = specialize THashBase; THashStrStr = specialize THashBase; + function hashNewIntInt (): THashIntInt; function hashNewStrInt (): THashStrInt; +function hashNewIntStr (): THashIntStr; function hashNewStrStr (): THashStrStr; @@ -189,10 +201,11 @@ function nextPOT (x: LongWord): LongWord; inline; // for integer keys -function hiiequ (constref a, b: Integer): Boolean; -function hiihash (constref k: Integer): LongWord; -function hsiequ (constref a, b: AnsiString): Boolean; -function hsihash (constref k: AnsiString): LongWord; +function hashIntEqu (constref a, b: Integer): Boolean; +function hashIntHash (constref k: Integer): LongWord; +function hashStrEqu (constref a, b: AnsiString): Boolean; +function hashStrHash (constref k: AnsiString): LongWord; +procedure hashStrFree (var s: AnsiString); implementation @@ -219,12 +232,13 @@ end; // ////////////////////////////////////////////////////////////////////////// // -function hiiequ (constref a, b: Integer): Boolean; begin result := (a = b); end; -function hsiequ (constref a, b: AnsiString): Boolean; begin result := (a = b); end; +function hashIntEqu (constref a, b: Integer): Boolean; begin result := (a = b); end; +function hashStrEqu (constref a, b: AnsiString): Boolean; begin result := (a = b); end; +procedure hashStrFree (var s: AnsiString); begin s := ''; end; {$PUSH} {$RANGECHECKS OFF} -function hiihash (constref k: Integer): LongWord; +function hashIntHash (constref k: Integer): LongWord; begin result := LongWord(k); result -= (result shl 6); @@ -236,7 +250,7 @@ begin result := result xor (result shr 15); end; -function hsihash (constref k: AnsiString): LongWord; +function hashStrHash (constref k: AnsiString): LongWord; begin if (Length(k) > 0) then result := fnvHash(PAnsiChar(k)^, Length(k)) else result := 0; end; @@ -245,19 +259,25 @@ end; function hashNewIntInt (): THashIntInt; begin - result := THashIntInt.Create(hiihash, hiiequ); + result := THashIntInt.Create(hashIntHash, hashIntEqu); end; function hashNewStrInt (): THashStrInt; begin - result := THashStrInt.Create(hsihash, hsiequ); + result := THashStrInt.Create(hashStrHash, hashStrEqu, hashStrFree); +end; + + +function hashNewIntStr (): THashIntStr; +begin + result := THashIntStr.Create(hashIntHash, hashIntEqu, nil, hashStrFree); end; function hashNewStrStr (): THashStrStr; begin - result := THashStrStr.Create(hsihash, hsiequ); + result := THashStrStr.Create(hashStrHash, hashStrEqu, hashStrFree, hashStrFree); end; @@ -361,15 +381,26 @@ end; // ////////////////////////////////////////////////////////////////////////// // -constructor THashBase.Create (ahashfn: THashFn; aequfn: TEquFn); +function THashBase.TEntry.getEmpty (): Boolean; inline; begin result := (hash = 0); end; + + +// ////////////////////////////////////////////////////////////////////////// // +function THashBase.getCapacity (): Integer; inline; begin result := Length(mBuckets); end; + + +constructor THashBase.Create (ahashfn: THashFn; aequfn: TEquFn; afreekeyfn: TFreeKeyFn=nil; afreevalfn: TFreeValueFn=nil); begin if not assigned(ahashfn) then raise Exception.Create('cannot create hash without hash function'); if not assigned(aequfn) then raise Exception.Create('cannot create hash without equality function'); hashfn := ahashfn; equfn := aequfn; + freekeyfn := afreekeyfn; + freevalfn := afreevalfn; mSeed := u32Hash($29a); + mFirstEntry := -1; + mLastEntry := -1; clear(); end; @@ -382,44 +413,65 @@ begin end; -procedure THashBase.clear (); +procedure THashBase.freeEntries (); var - idx: Integer; + f: Integer; + e: PEntry; begin - SetLength(mBuckets, InitSize); - for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; - SetLength(mEntries, Length(mBuckets)); - mBucketsUsed := 0; + if (mFirstEntry >= 0) then + begin + for f := mFirstEntry to mLastEntry do + begin + e := @mEntries[f]; + if not e.empty then + begin + if assigned(freekeyfn) then freekeyfn(e.key); + if assigned(freevalfn) then freevalfn(e.value); + e.key := Default(KeyT); + e.value := Default(ValueT); + e.hash := 0; + end; + end; + end + else if (Length(mEntries) > 0) then + begin + FillChar(mEntries[0], Length(mEntries)*sizeof(mEntries[0]), 0); + end; + mFreeEntryHead := nil; + mFirstEntry := -1; + mLastEntry := -1; {$IFDEF RBHASH_SANITY_CHECKS} mEntriesUsed := 0; {$ENDIF} - mFreeEntryHead := nil; //@mEntries[0]; - mFirstEntry := -1; - mLastEntry := -1; +end; + + +procedure THashBase.clear (); +//var idx: Integer; +begin + freeEntries(); + SetLength(mBuckets, InitSize); + FillChar(mBuckets[0], InitSize*sizeof(mBuckets[0]), 0); + //for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; + SetLength(mEntries, InitSize); + FillChar(mEntries[0], InitSize*sizeof(mEntries[0]), 0); + mBucketsUsed := 0; end; procedure THashBase.reset (); -var - idx: Integer; +//var idx: Integer; begin + freeEntries(); if (mBucketsUsed > 0) then begin - for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; + //for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; + FillChar(mBuckets[0], Length(mBuckets)*sizeof(mBuckets[0]), 0); mBucketsUsed := 0; - {$IFDEF RBHASH_SANITY_CHECKS} - mEntriesUsed := 0; - {$ENDIF} - mFreeEntryHead := nil; //@mEntries[0]; - mFirstEntry := -1; - mLastEntry := -1; end; end; -function THashBase.getCapacity (): Integer; inline; begin result := Length(mBuckets); end; - - function THashBase.allocEntry (): PEntry; var idx: Integer; @@ -442,7 +494,7 @@ begin end; {$IFDEF RBHASH_SANITY_CHECKS} if (mFreeEntryHead = nil) then raise Exception.Create('internal error in hash entry allocator (0)'); - if (mFreeEntryHead.hash <> 0) then raise Exception.Create('internal error in hash entry allocator (1)'); + if (not mFreeEntryHead.empty) then raise Exception.Create('internal error in hash entry allocator (1)'); {$ENDIF} result := mFreeEntryHead; mFreeEntryHead := result.nextFree; @@ -469,19 +521,23 @@ begin if (mEntriesUsed = 0) then raise Exception.Create('internal error in hash entry allocator'); if (mEntriesUsed <> mBucketsUsed) then raise Exception.Create('internal error in hash entry allocator (entry/bucket count mismatch)'); if (e = nil) then raise Exception.Create('internal error in hash entry allocator (trying to release nil entry)'); - if (e.hash = 0) then raise Exception.Create('internal error in hash entry allocator (trying to release unallocated entry)'); + if (e.empty) then raise Exception.Create('internal error in hash entry allocator (trying to release unallocated entry)'); {$ENDIF} idx := Integer((PtrUInt(e)-PtrUInt(@mEntries[0])) div sizeof(mEntries[0])); {$IFDEF RBHASH_SANITY_CHECKS} if (idx < 0) or (idx > High(mEntries)) then raise Exception.Create('internal error in hash entry allocator (invalid entry address)'); if (e <> @mEntries[idx]) then raise Exception.Create('internal error in hash entry allocator (wtf?!)'); {$ENDIF} + if assigned(freekeyfn) then freekeyfn(e.key); + if assigned(freevalfn) then freevalfn(e.value); {$IFDEF RBHASH_SANITY_CHECKS} Dec(mEntriesUsed); {$ENDIF} + e.key := Default(KeyT); + e.value := Default(ValueT); e.hash := 0; e.nextFree := mFreeEntryHead; - mFreeEntryHead := e; //idx; + mFreeEntryHead := e; // fix mFirstEntry and mLastEntry {$IFDEF RBHASH_SANITY_CHECKS} if (mFirstEntry < 0) or (mLastEntry < 0) then raise Exception.Create('internal error in hash entry allocator (invalid first/last range; 0)'); @@ -491,6 +547,7 @@ begin {$IFDEF RBHASH_SANITY_CHECKS} if (mEntriesUsed <> 0) then raise Exception.Create('internal error in hash entry allocator (invalid first/last range; 1)'); {$ENDIF} + mFreeEntryHead := nil; mFirstEntry := -1; mLastEntry := -1; end @@ -503,7 +560,7 @@ begin if (idx = mFirstEntry) then begin cidx := idx+1; - while (mEntries[cidx].hash = 0) do Inc(cidx); + while (mEntries[cidx].empty) do Inc(cidx); {$IFDEF RBHASH_SANITY_CHECKS} if (cidx > High(mEntries)) then raise Exception.Create('internal error in hash entry allocator (invalid first/last range; 3)'); {$ENDIF} @@ -513,7 +570,7 @@ begin if (idx = mLastEntry) then begin cidx := idx-1; - while (mEntries[cidx].hash = 0) do Dec(cidx); + while (mEntries[cidx].empty) do Dec(cidx); {$IFDEF RBHASH_SANITY_CHECKS} if (cidx < 0) then raise Exception.Create('internal error in hash entry allocator (invalid first/last range; 3)'); {$ENDIF} @@ -523,7 +580,6 @@ begin end; -(* function THashBase.distToStIdx (idx: LongWord): LongWord; inline; begin {$IFDEF RBHASH_SANITY_CHECKS} @@ -533,7 +589,6 @@ begin result := (mBuckets[idx].hash xor mSeed) and High(mBuckets); if (result <= idx) then result := idx-result else result := idx+(Length(mBuckets)-result); end; -*) function THashBase.has (constref akey: KeyT; keyhashin: PLongWord=nil): Boolean; @@ -565,10 +620,7 @@ begin for dist := 0 to bhigh do begin if (mBuckets[idx] = nil) then break; - //pdist := distToStIdx(idx); - pdist := (mBuckets[idx].hash xor xseed) and bhigh; - if (pdist <= idx) then pdist := idx-pdist else pdist := idx+((bhigh+1)-pdist); - // + pdist := distToStIdx(idx); if (dist > pdist) then break; result := (mBuckets[idx].hash = khash) and equfn(mBuckets[idx].key, akey); if result then break; @@ -605,10 +657,7 @@ begin for dist := 0 to bhigh do begin if (mBuckets[idx] = nil) then break; - //pdist := distToStIdx(idx); - pdist := (mBuckets[idx].hash xor xseed) and bhigh; - if (pdist <= idx) then pdist := idx-pdist else pdist := idx+((bhigh+1)-pdist); - // + pdist := distToStIdx(idx); if (dist > pdist) then break; result := (mBuckets[idx].hash = khash) and equfn(mBuckets[idx].key, akey); if result then begin rval := mBuckets[idx].value; break; end; @@ -622,7 +671,7 @@ end; procedure THashBase.putEntryInternal (swpe: PEntry); var idx, dist, pcur, pdist: LongWord; - tmpe: PEntry; // current entry to swap (or nothing) + tmpe: PEntry; bhigh, xseed: LongWord; begin bhigh := High(mBuckets); @@ -640,10 +689,7 @@ begin Inc(mBucketsUsed); break; end; - //pdist := distToStIdx(idx); - pdist := (mBuckets[idx].hash xor xseed) and bhigh; - if (pdist <= idx) then pdist := idx-pdist else pdist := idx+((bhigh+1)-pdist); - // + pdist := distToStIdx(idx); if (pcur > pdist) then begin // swapping the current bucket with the one to insert @@ -680,16 +726,15 @@ begin for dist := 0 to bhigh do begin if (mBuckets[idx] = nil) then break; - //pdist := distToStIdx(idx); - pdist := (mBuckets[idx].hash xor xseed) and bhigh; - if (pdist <= idx) then pdist := idx-pdist else pdist := idx+((bhigh+1)-pdist); - // + pdist := distToStIdx(idx); if (dist > pdist) then break; result := (mBuckets[idx].hash = khash) and equfn(mBuckets[idx].key, akey); if result then begin // replace element - //mBuckets[idx].key := akey; + if assigned(freekeyfn) then freekeyfn(mBuckets[idx].key); + if assigned(freevalfn) then freevalfn(mBuckets[idx].value); + mBuckets[idx].key := akey; mBuckets[idx].value := aval; exit; end; @@ -756,10 +801,7 @@ begin for dist := 0 to bhigh do begin if (mBuckets[idx] = nil) then break; - //pdist := distToStIdx(idxcur); - pdist := (mBuckets[idx].hash xor xseed) and bhigh; - if (pdist <= idx) then pdist := idx-pdist else pdist := idx+((bhigh+1)-pdist); - // + pdist := distToStIdx(idx); if (dist > pdist) then break; result := (mBuckets[idx].hash = khash) and equfn(mBuckets[idx].key, akey); if result then break; @@ -787,10 +829,7 @@ begin writeln(' dist=', dist, '; idx=', idx, '; idxnext=', idxnext, '; ce=', (mBuckets[idx] <> nil), '; ne=', (mBuckets[idxnext] <> nil)); {$ENDIF} if (mBuckets[idxnext] = nil) then begin {$IFDEF RBHASH_DEBUG_DELETE}writeln(' idxnext nil');{$ENDIF} mBuckets[idx] := nil; break; end; - //pdist := distToStIdx(idxnext); - pdist := (mBuckets[idxnext].hash xor xseed) and bhigh; - if (pdist <= idxnext) then pdist := idxnext-pdist else pdist := idxnext+((bhigh+1)-pdist); - // + pdist := distToStIdx(idxnext); if (pdist = 0) then begin {$IFDEF RBHASH_DEBUG_DELETE}writeln(' pdist is zero');{$ENDIF} mBuckets[idx] := nil; break; end; {$IFDEF RBHASH_DEBUG_DELETE}writeln(' pdist=', pdist);{$ENDIF} mBuckets[idx] := mBuckets[idxnext]; @@ -816,7 +855,8 @@ begin if (mSeed = 0) then mSeed := $29a; mSeed := u32Hash(mSeed); // clear buckets - for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; + //for idx := 0 to High(mBuckets) do mBuckets[idx] := nil; + FillChar(mBuckets[0], Length(mBuckets)*sizeof(mBuckets[0]), 0); mBucketsUsed := 0; // reinsert entries mFreeEntryHead := nil; @@ -824,7 +864,7 @@ begin for idx := 0 to High(mEntries) do begin e := @mEntries[idx]; - if (e.hash <> 0) then + if (not e.empty) then begin {$IFDEF RBHASH_SANITY_CHECKS} if (e.nextFree <> nil) then raise Exception.Create('internal error in rehash: inconsistent'); @@ -870,12 +910,12 @@ begin if (mBucketsUsed < 1) then raise Exception.Create('internal error in hash table (invalid bucket count; 0)'); {$ENDIF} didx := 0; - while (didx < Length(mEntries)) do if (mEntries[didx].hash <> 0) then Inc(didx) else break; + while (didx < Length(mEntries)) do if (not mEntries[didx].empty) then Inc(didx) else break; f := didx+1; // copy entries while true do begin - if (mEntries[f].hash <> 0) then + if (not mEntries[f].empty) then begin {$IFDEF RBHASH_SANITY_CHECKS} if (didx >= f) then raise Exception.Create('internal error in hash: inconsistent'); @@ -884,7 +924,7 @@ begin mEntries[f].hash := 0; Inc(didx); if (f = mLastEntry) then break; - while (didx < Length(mEntries)) do if (mEntries[didx].hash <> 0) then Inc(didx) else break; + while (didx < Length(mEntries)) do if (not mEntries[didx].empty) then Inc(didx) else break; end; Inc(f); end; @@ -897,14 +937,14 @@ begin cnt := 0; for f := mFirstEntry to mLastEntry do begin - if (mEntries[f].hash = 0) then raise Exception.Create('internal error in hash table (invalid first/last range; 2)'); + if (mEntries[f].empty) then raise Exception.Create('internal error in hash table (invalid first/last range; 2)'); Inc(cnt); end; if (cnt <> mBucketsUsed) then raise Exception.Create('internal error in hash table (invalid first/last range; 3)'); if (cnt <> mEntriesUsed) then raise Exception.Create('internal error in hash table (invalid first/last range; 4)'); for f := mLastEntry+1 to High(mEntries) do begin - if (mEntries[f].hash <> 0) then raise Exception.Create('internal error in hash table (invalid first/last range; 5)'); + if (not mEntries[f].empty) then raise Exception.Create('internal error in hash table (invalid first/last range; 5)'); end; {$ENDIF} end @@ -925,39 +965,33 @@ end; function THashBase.forEach (it: TIteratorFn): Boolean; overload; var - i: Integer; + f: Integer; begin result := false; - if not assigned(it) then exit; - i := mFirstEntry; - if (i < 0) then exit; - while (i <= mLastEntry) do + if not assigned(it) or (mFirstEntry < 0) then exit; + for f := mFirstEntry to mLastEntry do begin - if (mEntries[i].hash <> 0) then + if (not mEntries[f].empty) then begin - result := it(mEntries[i].key, mEntries[i].value); + result := it(mEntries[f].key, mEntries[f].value); if result then exit; end; - Inc(i); end; end; function THashBase.forEach (it: TIteratorExFn): Boolean; overload; var - i: Integer; + f: Integer; begin result := false; - if not assigned(it) then exit; - i := mFirstEntry; - if (i < 0) then exit; - while (i <= mLastEntry) do + if not assigned(it) or (mFirstEntry < 0) then exit; + for f := mFirstEntry to mLastEntry do begin - if (mEntries[i].hash <> 0) then + if (not mEntries[f].empty) then begin - result := it(mEntries[i].key, mEntries[i].value, mEntries[i].hash); + result := it(mEntries[f].key, mEntries[f].value, mEntries[f].hash); if result then exit; end; - Inc(i); end; end; @@ -1007,7 +1041,7 @@ begin Inc(cur); while (cur <= mLastEntry) do begin - if (mEntries[cur].hash <> 0) then begin result := true; exit; end; + if (not mEntries[cur].empty) then begin result := true; exit; end; end; result := false; end; @@ -1032,7 +1066,7 @@ begin Inc(cur); while (cur <= mLastEntry) do begin - if (mEntries[cur].hash <> 0) then begin result := true; exit; end; + if (not mEntries[cur].empty) then begin result := true; exit; end; end; result := false; end; @@ -1057,7 +1091,7 @@ begin Inc(cur); while (cur <= mLastEntry) do begin - if (mEntries[cur].hash <> 0) then begin result := true; exit; end; + if (not mEntries[cur].empty) then begin result := true; exit; end; end; result := false; end;