dvander@54: /*
dvander@54:  * Copyright (C) 2012 David Anderson
dvander@54:  *
dvander@54:  * This file is part of JITCraft.
dvander@54:  *
dvander@54:  * JITCraft is free software: you can redistribute it and/or modify it under
dvander@54:  * the terms of the GNU General Public License as published by the Free
dvander@54:  * Software Foundation, either version 3 of the License, or (at your option)
dvander@54:  * any later version.
dvander@54:  * 
dvander@54:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
dvander@54:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
dvander@54:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
dvander@54:  *
dvander@54:  * You should have received a copy of the GNU General Public License along with
dvander@54:  * JITCraft. If not, see http://www.gnu.org/licenses/.
dvander@54:  */
danderson@92: #include "Zone.h"
dvander@54: #include "StringPool.h"
dvander@54: #include "Strings.h"
dvander@54: #include "Spaces.h"
danderson@92: #include "Spaces-inl.h"
danderson@92: #include "Heap-inl.h"
dvander@54: 
dvander@59: using namespace ke;
dvander@54: 
dvander@54: StringPool::StringPool(Zone *zone)
dvander@54:   : zone_(zone),
dvander@54:     set_(ZoneAllocatorPolicy())
dvander@54: {
dvander@54: }
dvander@54: 
dvander@54: StringPool::~StringPool()
dvander@54: {
dvander@54: }
dvander@54: 
dvander@54: bool
dvander@54: StringPool::initialize()
dvander@54: {
dvander@54:     if (!set_.init(32))
dvander@54:         return false;
dvander@54:     return true;
dvander@54: }
dvander@54: 
dvander@54: String *
dvander@54: StringPool::add(const char *str, size_t length)
dvander@54: {
dvander@54:     StringSet::Insert i = set_.findForAdd(CharsAndLength(str, length));
dvander@54:     if (i.found())
dvander@54:         return *i;
dvander@54: 
dvander@69:     Local<String> obj(zone_, String::New(zone_, str, length, Heap::Tenure_Old));
dvander@54:     if (!obj)
dvander@54:         return NULL;
dvander@54: 
dvander@54:     set_.add(i, obj);
dvander@54:     return obj;
dvander@54: }
dvander@54: 
dvander@54: void
dvander@54: StringPool::sweep()
dvander@54: {
dvander@54:     for (StringSet::iterator i(&set_); !i.empty(); i.next()) {
dvander@54:         String *obj = *i;
dvander@54:         MarkBit bits = HeapChunk::GetMarkBit(obj);
dvander@54:         if (HeapChunk::IsWhite(bits))
dvander@54:             i.erase();
dvander@54:         else
dvander@54:             assert(HeapChunk::IsBlack(bits));
dvander@54:     }
dvander@54:     set_.checkDensity();
dvander@54: }