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products/sources/formale Sprachen/Java/Openjdk/src/hotspot/share/ci/ (Sun/Oracle ^©) Datei vom 13.11.2022 mit Größe 2 kB

Quelle ciConstantPoolCache.cpp Sprache: C

/*
* Copyright (c) 1999, 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.
*
*/

#include "precompiled.hpp"
#include "ci/ciConstantPoolCache.hpp"
#include "ci/ciUtilities.inline.hpp"
#include "memory/allocation.hpp"
#include "memory/allocation.inline.hpp"

// ciConstantPoolCache
//
// This class caches indexed constant pool lookups.

// ------------------------------------------------------------------
// ciConstantPoolCache::ciConstantPoolCache
ciConstantPoolCache::ciConstantPoolCache(Arena* arena,
                                 int expected_size) {
  _elements =
    new (arena) GrowableArray<void*>(arena, expected_size, 0, 0);
  _keys = new (arena) GrowableArray<int>(arena, expected_size, 0, 0);
}

int ciConstantPoolCache::key_compare(const int& key, const int& elt) {
  if (key < elt)      return -1;
  else if (key > elt) return 1;
  else                  return 0;
}

// ------------------------------------------------------------------
// ciConstantPoolCache::get
//
// Get the entry at some index
void* ciConstantPoolCache::get(int index) {
  ASSERT_IN_VM;
  bool found = false;
  int pos = _keys->find_sorted<int, ciConstantPoolCache::key_compare>(index, found);
  if (!found) {
    // This element is not present in the cache.
    return NULL;
  }
  return _elements->at(pos);
}

// ------------------------------------------------------------------
// ciConstantPoolCache::insert
//
// Insert a ciObject into the table at some index.
void ciConstantPoolCache::insert(int index, void* elem) {
  bool found = false;
  int pos = _keys->find_sorted<int, ciConstantPoolCache::key_compare>(index, found);
  assert(!found, "duplicate");
  _keys->insert_before(pos, index);
  _elements->insert_before(pos, elem);
}

// ------------------------------------------------------------------
// ciConstantPoolCache::print
//
// Print debugging information about the cache.
void ciConstantPoolCache::print() {
  Unimplemented();
}

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