Check for APR and GNU make.

[cycript.git] / Pooling.hpp

/* Cycript - Inlining/Optimizing JavaScript Compiler
 * Copyright (C) 2009  Jay Freeman (saurik)
*/

/* Modified BSD License {{{ */
/*
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 * forms, with or without modification, are permitted
 * provided that the following conditions are met:
 *
 * 1. Redistributions of source code must retain the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the
 *    above copyright notice, this list of conditions
 *    and the following disclaimer in the documentation
 *    and/or other materials provided with the
 *    distribution.
 * 3. The name of the author may not be used to endorse
 *    or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS''
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING,
 * BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
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*/
/* }}} */

#ifndef CYPOOLING_HPP
#define CYPOOLING_HPP

#include <apr_pools.h>
#include <apr_strings.h>

#include "Exception.hpp"
#include "Standard.hpp"

#include <cstdlib>

_finline void *operator new(size_t size, apr_pool_t *pool) {
    return apr_palloc(pool, size);
}

_finline void *operator new [](size_t size, apr_pool_t *pool) {
    return apr_palloc(pool, size);
}

class CYPool {
  private:
    apr_pool_t *pool_;

  public:
    CYPool() {
        _aprcall(apr_pool_create(&pool_, NULL));
    }

    ~CYPool() {
        apr_pool_destroy(pool_);
    }

    void Clear() {
        apr_pool_clear(pool_);
    }

    operator apr_pool_t *() const {
        return pool_;
    }

    char *operator ()(const char *data) const {
        return apr_pstrdup(pool_, data);
    }

    char *operator ()(const char *data, size_t size) const {
        return apr_pstrndup(pool_, data, size);
    }
};

struct CYData {
    apr_pool_t *pool_;
    unsigned count_;

    CYData() :
        count_(1)
    {
    }

    virtual ~CYData() {
    }

    static void *operator new(size_t size, apr_pool_t *pool) {
        void *data(apr_palloc(pool, size));
        reinterpret_cast<CYData *>(data)->pool_ = pool;
        return data;
    }

    static void *operator new(size_t size) {
        apr_pool_t *pool;
        _aprcall(apr_pool_create(&pool, NULL));
        return operator new(size, pool);
    }

    static void operator delete(void *data) {
        apr_pool_destroy(reinterpret_cast<CYData *>(data)->pool_);
    }
};

template <typename Type_>
struct CYPoolAllocator {
    apr_pool_t *pool_;

    typedef Type_ value_type;
    typedef value_type *pointer;
    typedef const value_type *const_pointer;
    typedef value_type &reference;
    typedef const value_type &const_reference;
    typedef std::size_t size_type;
    typedef std::ptrdiff_t difference_type;

    CYPoolAllocator() :
        pool_(NULL)
    {
    }

    template <typename Right_>
    CYPoolAllocator(const CYPoolAllocator<Right_> &rhs) :
        pool_(rhs.pool_)
    {
    }

    pointer allocate(size_type size, const void *hint = 0) {
        return reinterpret_cast<pointer>(apr_palloc(pool_, size));
    }

    void deallocate(pointer data, size_type size) {
    }

    void construct(pointer address, const Type_ &rhs) {
        new(address) Type_(rhs);
    }

    void destroy(pointer address) {
        address->~Type_();
    }

    template <typename Right_>
    inline bool operator==(const CYPoolAllocator<Right_> &rhs) {
        return pool_ == rhs.pool_;
    }

    template <typename Right_>
    inline bool operator!=(const CYPoolAllocator<Right_> &rhs) {
        return !operator==(rhs);
    }

    template <typename Right_>
    struct rebind {
        typedef CYPoolAllocator<Right_> other;
    };
};

#endif/*CYPOOLING_HPP*/