asherkin@263: /*
asherkin@263:  * Copyright (C) 2012 David Anderson
asherkin@263:  *
asherkin@263:  * This file is part of JITCraft.
asherkin@263:  *
asherkin@263:  * JITCraft is free software: you can redistribute it and/or modify it under
asherkin@263:  * the terms of the GNU General Public License as published by the Free
asherkin@263:  * Software Foundation, either version 3 of the License, or (at your option)
asherkin@263:  * any later version.
asherkin@263:  * 
asherkin@263:  * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
asherkin@263:  * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
asherkin@263:  * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
asherkin@263:  *
asherkin@263:  * You should have received a copy of the GNU General Public License along with
asherkin@263:  * JITCraft. If not, see http://www.gnu.org/licenses/.
asherkin@263:  */
asherkin@263: #include "Zone.h"
asherkin@263: #include "StringPool.h"
asherkin@263: #include "Strings.h"
asherkin@263: #include "Spaces.h"
asherkin@263: #include "Spaces-inl.h"
asherkin@263: #include "Heap-inl.h"
asherkin@263: 
asherkin@263: using namespace ke;
asherkin@263: 
asherkin@263: StringPool::StringPool(Zone *zone)
asherkin@263:   : zone_(zone),
asherkin@263:     set_(ZoneAllocatorPolicy())
asherkin@263: {
asherkin@263: }
asherkin@263: 
asherkin@263: StringPool::~StringPool()
asherkin@263: {
asherkin@263: }
asherkin@263: 
asherkin@263: bool
asherkin@263: StringPool::initialize()
asherkin@263: {
asherkin@263:     if (!set_.init(32))
asherkin@263:         return false;
asherkin@263:     return true;
asherkin@263: }
asherkin@263: 
asherkin@263: String *
asherkin@263: StringPool::add(const char *str, size_t length)
asherkin@263: {
asherkin@263:     StringSet::Insert i = set_.findForAdd(CharsAndLength(str, length));
asherkin@263:     if (i.found())
asherkin@263:         return *i;
asherkin@263: 
asherkin@263:     Local<String> obj(zone_, String::New(zone_, str, length, Heap::Tenure_Old));
asherkin@263:     if (!obj)
asherkin@263:         return NULL;
asherkin@263: 
asherkin@263:     set_.add(i, obj);
asherkin@263:     return obj;
asherkin@263: }
asherkin@263: 
asherkin@263: void
asherkin@263: StringPool::sweep()
asherkin@263: {
asherkin@263:     for (StringSet::iterator i(&set_); !i.empty(); i.next()) {
asherkin@263:         String *obj = *i;
asherkin@263:         MarkBit bits = HeapChunk::GetMarkBit(obj);
asherkin@263:         if (HeapChunk::IsWhite(bits))
asherkin@263:             i.erase();
asherkin@263:         else
asherkin@263:             assert(HeapChunk::IsBlack(bits));
asherkin@263:     }
asherkin@263:     set_.checkDensity();
asherkin@263: }