8e9eebeba1
OrderedHashTable is an insertion-ordered HashTable based on Jason Orendorff's writeup of a data structure attributed to Tyler Close: https://wiki.mozilla.org/User:Jorend/Deterministic_hash_tables It is intended as the new backing store for JSSet/JSMap, as ES6 requires insertion-order-based iteration. Note, however, that in the interest of keeping the initial check-in small this patch does not yet include any iteration support. This change also doesn't yet touch any existing behavior, but in a branch I've verified that these structures pass the existing JSSet/JSMap mjsunit tests. BUG=v8:1793 LOG=N R=mstarzinger@chromium.org Review URL: https://codereview.chromium.org/220293002 git-svn-id: http://v8.googlecode.com/svn/branches/bleeding_edge@20522 ce2b1a6d-e550-0410-aec6-3dcde31c8c00
159 lines
6.7 KiB
C++
159 lines
6.7 KiB
C++
// Copyright 2014 the V8 project authors. All rights reserved.
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// Redistribution and use in source and binary forms, with or without
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// modification, are permitted provided that the following conditions are
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// met:
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//
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// * Redistributions of source code must retain the above copyright
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// notice, this list of conditions and the following disclaimer.
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// * Redistributions in binary form must reproduce the above
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// copyright notice, this list of conditions and the following
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// disclaimer in the documentation and/or other materials provided
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// with the distribution.
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// * Neither the name of Google Inc. nor the names of its
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// contributors may be used to endorse or promote products derived
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// from this software without specific prior written permission.
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//
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// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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#include <stdlib.h>
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#include "v8.h"
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#include "cctest.h"
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#include "factory.h"
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namespace {
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using namespace v8::internal;
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TEST(Set) {
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LocalContext context;
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Isolate* isolate = CcTest::i_isolate();
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Factory* factory = isolate->factory();
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HandleScope scope(isolate);
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Handle<OrderedHashSet> ordered_set = factory->NewOrderedHashSet();
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CHECK_EQ(2, ordered_set->NumberOfBuckets());
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CHECK_EQ(0, ordered_set->NumberOfElements());
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CHECK_EQ(0, ordered_set->NumberOfDeletedElements());
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Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
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Handle<JSObject> obj = factory->NewJSObjectFromMap(map);
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CHECK(!ordered_set->Contains(*obj));
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ordered_set = OrderedHashSet::Add(ordered_set, obj);
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CHECK_EQ(1, ordered_set->NumberOfElements());
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CHECK(ordered_set->Contains(*obj));
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ordered_set = OrderedHashSet::Remove(ordered_set, obj);
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CHECK_EQ(0, ordered_set->NumberOfElements());
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CHECK(!ordered_set->Contains(*obj));
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// Test for collisions/chaining
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Handle<JSObject> obj1 = factory->NewJSObjectFromMap(map);
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ordered_set = OrderedHashSet::Add(ordered_set, obj1);
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Handle<JSObject> obj2 = factory->NewJSObjectFromMap(map);
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ordered_set = OrderedHashSet::Add(ordered_set, obj2);
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Handle<JSObject> obj3 = factory->NewJSObjectFromMap(map);
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ordered_set = OrderedHashSet::Add(ordered_set, obj3);
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CHECK_EQ(3, ordered_set->NumberOfElements());
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CHECK(ordered_set->Contains(*obj1));
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CHECK(ordered_set->Contains(*obj2));
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CHECK(ordered_set->Contains(*obj3));
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// Test growth
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ordered_set = OrderedHashSet::Add(ordered_set, obj);
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Handle<JSObject> obj4 = factory->NewJSObjectFromMap(map);
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ordered_set = OrderedHashSet::Add(ordered_set, obj4);
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CHECK(ordered_set->Contains(*obj));
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CHECK(ordered_set->Contains(*obj1));
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CHECK(ordered_set->Contains(*obj2));
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CHECK(ordered_set->Contains(*obj3));
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CHECK(ordered_set->Contains(*obj4));
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CHECK_EQ(5, ordered_set->NumberOfElements());
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CHECK_EQ(0, ordered_set->NumberOfDeletedElements());
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CHECK_EQ(4, ordered_set->NumberOfBuckets());
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// Test shrinking
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ordered_set = OrderedHashSet::Remove(ordered_set, obj);
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ordered_set = OrderedHashSet::Remove(ordered_set, obj1);
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ordered_set = OrderedHashSet::Remove(ordered_set, obj2);
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ordered_set = OrderedHashSet::Remove(ordered_set, obj3);
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CHECK_EQ(1, ordered_set->NumberOfElements());
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CHECK_EQ(2, ordered_set->NumberOfBuckets());
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}
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TEST(Map) {
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LocalContext context;
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Isolate* isolate = CcTest::i_isolate();
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Factory* factory = isolate->factory();
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HandleScope scope(isolate);
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Handle<OrderedHashMap> ordered_map = factory->NewOrderedHashMap();
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CHECK_EQ(2, ordered_map->NumberOfBuckets());
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CHECK_EQ(0, ordered_map->NumberOfElements());
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CHECK_EQ(0, ordered_map->NumberOfDeletedElements());
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Handle<Map> map = factory->NewMap(JS_OBJECT_TYPE, JSObject::kHeaderSize);
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Handle<JSObject> obj = factory->NewJSObjectFromMap(map);
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Handle<JSObject> val = factory->NewJSObjectFromMap(map);
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CHECK(ordered_map->Lookup(*obj)->IsTheHole());
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ordered_map = OrderedHashMap::Put(ordered_map, obj, val);
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CHECK_EQ(1, ordered_map->NumberOfElements());
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CHECK(ordered_map->Lookup(*obj)->SameValue(*val));
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ordered_map = OrderedHashMap::Put(
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ordered_map, obj, factory->the_hole_value());
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CHECK_EQ(0, ordered_map->NumberOfElements());
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CHECK(ordered_map->Lookup(*obj)->IsTheHole());
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// Test for collisions/chaining
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Handle<JSObject> obj1 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> obj2 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> obj3 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> val1 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> val2 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> val3 = factory->NewJSObjectFromMap(map);
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ordered_map = OrderedHashMap::Put(ordered_map, obj1, val1);
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ordered_map = OrderedHashMap::Put(ordered_map, obj2, val2);
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ordered_map = OrderedHashMap::Put(ordered_map, obj3, val3);
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CHECK_EQ(3, ordered_map->NumberOfElements());
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CHECK(ordered_map->Lookup(*obj1)->SameValue(*val1));
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CHECK(ordered_map->Lookup(*obj2)->SameValue(*val2));
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CHECK(ordered_map->Lookup(*obj3)->SameValue(*val3));
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// Test growth
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ordered_map = OrderedHashMap::Put(ordered_map, obj, val);
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Handle<JSObject> obj4 = factory->NewJSObjectFromMap(map);
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Handle<JSObject> val4 = factory->NewJSObjectFromMap(map);
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ordered_map = OrderedHashMap::Put(ordered_map, obj4, val4);
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CHECK(ordered_map->Lookup(*obj)->SameValue(*val));
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CHECK(ordered_map->Lookup(*obj1)->SameValue(*val1));
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CHECK(ordered_map->Lookup(*obj2)->SameValue(*val2));
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CHECK(ordered_map->Lookup(*obj3)->SameValue(*val3));
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CHECK(ordered_map->Lookup(*obj4)->SameValue(*val4));
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CHECK_EQ(5, ordered_map->NumberOfElements());
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CHECK_EQ(4, ordered_map->NumberOfBuckets());
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// Test shrinking
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ordered_map = OrderedHashMap::Put(
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ordered_map, obj, factory->the_hole_value());
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ordered_map = OrderedHashMap::Put(
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ordered_map, obj1, factory->the_hole_value());
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ordered_map = OrderedHashMap::Put(
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ordered_map, obj2, factory->the_hole_value());
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ordered_map = OrderedHashMap::Put(
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ordered_map, obj3, factory->the_hole_value());
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CHECK_EQ(1, ordered_map->NumberOfElements());
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CHECK_EQ(2, ordered_map->NumberOfBuckets());
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}
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}
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