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/* Copyright (C) 2003 MySQL AB
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; version 2 of the License.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */
#ifndef DYNARR256_HPP
#define DYNARR256_HPP
#include "Pool.hpp"
class DynArr256;
struct DA256Page;
class DynArr256Pool
{
friend class DynArr256;
public:
DynArr256Pool();
void init(Uint32 type_id, const Pool_context& pc);
protected:
Uint32 m_type_id;
Uint32 m_first_free;
Pool_context m_ctx;
struct DA256Page* m_memroot;
private:
Uint32 seize();
void release(Uint32);
};
class DynArr256
{
public:
struct Head
{
Head() { m_ptr_i = RNIL; m_sz = 0;}
Uint32 m_ptr_i;
Uint32 m_sz;
bool isEmpty() const { return m_sz == 0;}
};
DynArr256(DynArr256Pool & pool, Head& head) :
m_head(head), m_pool(pool){}
Uint32* set(Uint32 pos);
Uint32* get(Uint32 pos) const ;
struct ReleaseIterator
{
Uint32 m_sz;
Uint32 m_pos;
Uint32 m_ptr_i[5];
};
void init(ReleaseIterator&);
/**
* return 0 - done
* 1 - data (in retptr)
* 2 - nodata
*/
Uint32 release(ReleaseIterator&, Uint32* retptr);
protected:
Head & m_head;
DynArr256Pool & m_pool;
bool expand(Uint32 pos);
void handle_invalid_ptr(Uint32 pos, Uint32 ptrI, Uint32 p0);
};
#endif
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