jdk8-mips64-public/hotspot: src/share/vm/adlc/dict2.hpp@246d977b51f2 (annotated)

src/share/vm/adlc/dict2.hpp@246d977b51f2 (annotated)

src/share/vm/adlc/dict2.hpp

Mon, 25 Jun 2012 21:33:35 -0400

author: coleenp
date: Mon, 25 Jun 2012 21:33:35 -0400
changeset 3875: 246d977b51f2
parent 2314: f95d63e2154a
child 6876: 710a3c8b516e
permissions: -rw-r--r--

7178670: runtime/7158800/BadUtf8.java fails in SymbolTable::rehash_table
Summary: Cannot delete _buckets and HashtableEntries in shared space (CDS)
Reviewed-by: acorn, kvn, dlong, dcubed, kamg

 /*
  * Copyright (c) 1998, 2010, Oracle and/or its affiliates. All rights reserved.
  * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
  *
  * This code is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License version 2 only, as
  * published by the Free Software Foundation.
  *
  * This code is distributed in the hope that it will be useful, but WITHOUT
  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
  * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  * version 2 for more details (a copy is included in the LICENSE file that
  * accompanied this code).
  *
  * You should have received a copy of the GNU General Public License version
  * 2 along with this work; if not, write to the Free Software Foundation,
  * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
  *
  * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
  * or visit www.oracle.com if you need additional information or have any
  * questions.
  *
  */
 #ifndef SHARE_VM_ADLC_DICT2_HPP
 #define SHARE_VM_ADLC_DICT2_HPP
 // Dictionaries - An Abstract Data Type
 class Dict;
 // These dictionaries define a key-value mapping.  They can be inserted to,
 // searched or deleted from.  They grow and shrink as needed.  The key is a
 // pointer to something (or anything which can be stored in a pointer).  A
 // key comparison routine determines if two keys are equal or not.  A hash
 // function can be provided; if it's not provided the key itself is used
 // instead.  A nice string hash function is included.
 typedef int  (*CmpKey)(const void *key1, const void *key2);
 typedef int  (*Hash)(const void *key);
 typedef void (*PrintKeyOrValue)(const void *key_or_value);
 typedef void (*FuncDict)(const void *key, const void *val, Dict *d);
 class Dict { // Dictionary structure
  private:
   class Arena *_arena;          // Where to draw storage from
   class bucket *_bin;           // Hash table is array of buckets
   int _size;                    // Size (# of slots) in hash table
   int _cnt;                     // Number of key-value pairs in hash table
   const Hash _hash;             // Hashing function
   const CmpKey _cmp;            // Key comparison function
   void doubhash( void );        // Double hash table size
  public:
   friend class DictI;            // Friendly iterator function
   // cmp is a key comparision routine.  hash is a routine to hash a key.
   Dict( CmpKey cmp, Hash hash );
   Dict( CmpKey cmp, Hash hash, Arena *arena );
   void init();
   ~Dict();
   Dict( const Dict & );         // Deep-copy guts
   Dict &operator =( const Dict & );
   // Zap to empty; ready for re-use
   void Clear();
   // Return # of key-value pairs in dict
   int Size(void) const { return _cnt; }
   // Insert inserts the given key-value pair into the dictionary.  The prior
   // value of the key is returned; NULL if the key was not previously defined.
   const void *Insert(const void *key, const void *val); // A new key-value
   const void *Delete(void *key);                        // Delete & return old
   // Find finds the value of a given key; or NULL if not found.
   // The dictionary is NOT changed.
   const void *operator [](const void *key) const;  // Do a lookup
   // == compares two dictionaries; they must have the same keys (their keys
   // must match using CmpKey) and they must have the same values (pointer
   // comparison).  If so 1 is returned, if not 0 is returned.
   int operator ==(const Dict &d) const;   // Compare dictionaries for equal
   // Print out the dictionary contents as key-value pairs
   void print();
   void print(PrintKeyOrValue print_key, PrintKeyOrValue print_value);
 };
 // Hashing functions
 int hashstr(const void *s);        // Nice string hash
 // Slimey cheap hash function; no guaranteed performance.  Better than the
 // default for pointers, especially on MS-DOS machines.
 int hashptr(const void *key);
 // Slimey cheap hash function; no guaranteed performance.
 int hashkey(const void *key);
 // Key comparators
 int cmpstr(const void *k1, const void *k2);
 // Slimey cheap key comparator.
 int cmpkey(const void *key1, const void *key2);
 //------------------------------Iteration--------------------------------------
 // The class of dictionary iterators.  Fails in the presences of modifications
 // to the dictionary during iteration (including searches).
 // Usage:  for( DictI i(dict); i.test(); ++i ) { body = i.key; body = i.value;}
 class DictI {
  private:
   const Dict *_d;               // Dictionary being iterated over
   int _i;                      // Counter over the bins
   int _j;                      // Counter inside each bin
  public:
   const void *_key, *_value;          // Easy access to the key-value pair
   DictI( const Dict *d ) {reset(d);}; // Create a new iterator
   void reset( const Dict *dict );     // Reset existing iterator
   void operator ++(void);             // Increment iterator
   int test(void) { return _i<_d->_size;} // Test for end of iteration
 };
 #endif // SHARE_VM_ADLC_DICT2_HPP

Mercurial > jdk8-mips64-public > hotspot / annotate

src/share/vm/adlc/dict2.hpp@246d977b51f2 (annotated)

src/share/vm/adlc/dict2.hpp