1.1 --- /dev/null	Thu Jan 01 00:00:00 1970 +0000
     1.2 +++ b/src/StringPool.cpp	Tue Jul 24 23:53:34 2012 -0700
     1.3 @@ -0,0 +1,69 @@
     1.4 +/*
     1.5 + * Copyright (C) 2012 David Anderson
     1.6 + *
     1.7 + * This file is part of JITCraft.
     1.8 + *
     1.9 + * JITCraft is free software: you can redistribute it and/or modify it under
    1.10 + * the terms of the GNU General Public License as published by the Free
    1.11 + * Software Foundation, either version 3 of the License, or (at your option)
    1.12 + * any later version.
    1.13 + * 
    1.14 + * Foobar is distributed in the hope that it will be useful, but WITHOUT ANY
    1.15 + * WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    1.16 + * FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.
    1.17 + *
    1.18 + * You should have received a copy of the GNU General Public License along with
    1.19 + * JITCraft. If not, see http://www.gnu.org/licenses/.
    1.20 + */
    1.21 +#include "StringPool.h"
    1.22 +#include "Strings.h"
    1.23 +#include "Spaces.h"
    1.24 +
    1.25 +using namespace ke;
    1.26 +
    1.27 +StringPool::StringPool(Zone *zone)
    1.28 +  : zone_(zone),
    1.29 +    set_(ZoneAllocatorPolicy())
    1.30 +{
    1.31 +}
    1.32 +
    1.33 +StringPool::~StringPool()
    1.34 +{
    1.35 +}
    1.36 +
    1.37 +bool
    1.38 +StringPool::initialize()
    1.39 +{
    1.40 +    if (!set_.init(32))
    1.41 +        return false;
    1.42 +    return true;
    1.43 +}
    1.44 +
    1.45 +String *
    1.46 +StringPool::add(const char *str, size_t length)
    1.47 +{
    1.48 +    StringSet::Insert i = set_.findForAdd(CharsAndLength(str, length));
    1.49 +    if (i.found())
    1.50 +        return *i;
    1.51 +
    1.52 +    Local<String> obj(zone_, String::New(zone_, str, length, Heap::Tenure_Old));
    1.53 +    if (!obj)
    1.54 +        return NULL;
    1.55 +
    1.56 +    set_.add(i, obj);
    1.57 +    return obj;
    1.58 +}
    1.59 +
    1.60 +void
    1.61 +StringPool::sweep()
    1.62 +{
    1.63 +    for (StringSet::iterator i(&set_); !i.empty(); i.next()) {
    1.64 +        String *obj = *i;
    1.65 +        MarkBit bits = HeapChunk::GetMarkBit(obj);
    1.66 +        if (HeapChunk::IsWhite(bits))
    1.67 +            i.erase();
    1.68 +        else
    1.69 +            assert(HeapChunk::IsBlack(bits));
    1.70 +    }
    1.71 +    set_.checkDensity();
    1.72 +}