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Allocator.h
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Allocator.h
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/* ***** BEGIN LICENSE BLOCK *****
* Version: MPL 1.1/GPL 2.0/LGPL 2.1
*
* The contents of this file are subject to the Mozilla Public License Version
* 1.1 (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
* http://www.mozilla.org/MPL/
*
* Software distributed under the License is distributed on an "AS IS" basis,
* WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
* for the specific language governing rights and limitations under the
* License.
*
* The Original Code is CBash code.
*
* The Initial Developer of the Original Code is
* Waruddar.
* Portions created by the Initial Developer are Copyright (C) 2010
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* Alternatively, the contents of this file may be used under the terms of
* either the GNU General Public License Version 2 or later (the "GPL"), or
* the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
* in which case the provisions of the GPL or the LGPL are applicable instead
* of those above. If you wish to allow use of your version of this file only
* under the terms of either the GPL or the LGPL, and not to allow others to
* use your version of this file under the terms of the MPL, indicate your
* decision by deleting the provisions above and replace them with the notice
* and other provisions required by the GPL or the LGPL. If you do not delete
* the provisions above, a recipient may use your version of this file under
* the terms of any one of the MPL, the GPL or the LGPL.
*
* ***** END LICENSE BLOCK ***** */
#pragma once
#include "Common.h"
//#include "GenericRecord.h"
#include <vector>
#include <malloc.h>
template<class T, UINT32 RecType, UINT32 AllocUnit>
class RecordPoolAllocator
{
private:
unsigned char *freed_position;
std::vector<unsigned char *> buffers;
public:
RecordPoolAllocator():
freed_position(NULL)
{
//reserve(AllocUnit);
}
~RecordPoolAllocator()
{
purge_with_destructors();
}
//UINT32 try_to_free()
// {
// //attempts to free any unused buffers. Will mostly fail to free any memory unless a large number of records have been destroyed.
// //this is a relatively slow function. Don't call it unless necessary.
// UINT32 freed_bytes = 0;
// if(freed_position)
// {
// boost::unordered_set<unsigned char *> free_set;
// MakeFreeSet(free_set);
// for(SINT32 p = (SINT32)buffers.size() - 1;p >= 0; --p)
// {
// unsigned char *buffer = buffers[p];
// UINT32 buffer_size = (UINT32)_msize(buffer);
// //in case malloc returned more than the requested amount
// buffer_size -= buffer_size % sizeof(T);
// unsigned char *end_of_buffer = buffer + buffer_size;
// bool buffer_in_use = false;
// for(unsigned char *last_position = buffer;last_position < end_of_buffer; last_position += sizeof(T))
// {
// if(free_set.find(last_position) == free_set.end())
// {
// buffer_in_use = true;
// break;
// }
// }
// if(!buffer_in_use)
// {
// UINT32 max_count = buffer_size / sizeof(T);
// UINT32 removed_count = 0;
// //Remove any freed entries at the head of the list
// while(removed_count < max_count && (freed_position >= buffer && freed_position < end_of_buffer))
// {
// removed_count++;
// freed_position = *(unsigned char **)freed_position;
// };
// for(unsigned char *last_position = freed_position, *next_position = NULL; removed_count < max_count && (last_position != NULL);last_position = next_position)
// {
// next_position = *(unsigned char **)last_position;
// while(next_position >= buffer && next_position < end_of_buffer)
// {
// removed_count++;
// next_position = *(unsigned char **)next_position;
// *(unsigned char **)last_position = next_position;
// };
// }
// freed_bytes += (UINT32)_msize(buffer);
// free(buffer);
// buffers.erase(buffers.begin() + p);
// }
// }
// }
// return freed_bytes;
// }
void purge_no_destructors()
{
for(UINT32 p = 0;p < buffers.size(); p++)
free(buffers[p]);
buffers.clear();
//_heapmin();
freed_position = NULL;
}
void purge_with_destructors()
{
boost::unordered_set<unsigned char *> free_set;
MakeFreeSet(free_set);
for(UINT32 p = 0;p < buffers.size(); p++)
{
UINT32 buffer_size = (UINT32)_msize(buffers[p]);
//in case malloc returned more than the requested amount
buffer_size -= buffer_size % sizeof(T);
unsigned char *end_of_buffer = buffers[p] + buffer_size;
for(unsigned char *last_position = buffers[p];last_position < end_of_buffer; last_position += sizeof(T))
{
if(free_set.find(last_position) == free_set.end())
{
//printer("Destroying: %08X\n", ((Record *)last_position)->formID);
((Record *)last_position)->~Record();
}
}
free(buffers[p]);
}
buffers.clear();
freed_position = NULL;
}
void reserve(UINT32 elements)
{
//Allocate memory
unsigned char *buffer = (unsigned char *)malloc(sizeof(T) * elements);
if(buffer == 0)
throw std::bad_alloc();
buffers.push_back(buffer);
//memset(buffer, 0x00, buffer_size);
//Populate the free linked list in reverse so that the first freed_position is at the beginning of the buffer
for(unsigned char *last_position = buffer + (sizeof(T) * elements) - sizeof(T);last_position >= buffer; last_position -= sizeof(T))
{
*(unsigned char **)last_position = freed_position;
freed_position = last_position;
}
}
Record *construct(unsigned char *recData, void *Parent, bool IsMod)
{
if(freed_position == NULL)
reserve(AllocUnit);
unsigned char *next_position = *(unsigned char **)freed_position;
Record * curRecord = new (freed_position) T(recData);
curRecord->SetParent(Parent, IsMod);
freed_position = next_position;
return curRecord;
}
Record *construct(Record *SourceRecord, void *Parent, bool IsMod)
{
if(freed_position == NULL)
reserve(AllocUnit);
unsigned char *next_position = *(unsigned char **)freed_position;
Record * curRecord = new (freed_position) T((T *)SourceRecord);
curRecord->SetParent(Parent, IsMod);
freed_position = next_position;
return curRecord;
}
void destroy(Record *curRecord)
{
if(curRecord == NULL)
return;
curRecord->~Record();
*(unsigned char **)curRecord = freed_position;
freed_position = (unsigned char *)curRecord;
}
void deallocate(Record *curRecord)
{
if(curRecord == NULL)
return;
*(unsigned char **)curRecord = freed_position;
freed_position = (unsigned char *)curRecord;
}
UINT32 object_capacity()
{
UINT32 size = 0;
for(UINT32 p = 0;p < buffers.size(); p++)
{
UINT32 buffer_size = (UINT32)_msize(buffers[p]);
//in case malloc returned more than the requested amount
buffer_size -= buffer_size % sizeof(T);
size += buffer_size / sizeof(T);
}
return size;
}
UINT32 free_object_capacity()
{
UINT32 size = 0;
if(freed_position)
{
size++;
for(unsigned char *next_position = *(unsigned char **)freed_position; next_position != NULL; next_position = *(unsigned char **)next_position)
{
size++;
}
}
return size;
}
UINT32 used_object_capacity()
{
return object_capacity() - free_object_capacity();
}
UINT32 bytes_capacity()
{
return object_capacity() * sizeof(T);
}
UINT32 free_bytes_capacity()
{
return free_object_capacity() * sizeof(T);
}
UINT32 used_bytes_capacity()
{
return used_object_capacity() * sizeof(T);
}
bool VisitRecords(RecordOp &op)
{
boost::unordered_set<unsigned char *> free_set;
MakeFreeSet(free_set);
for(UINT32 p = 0;p < buffers.size(); p++)
{
UINT32 buffer_size = (UINT32)_msize(buffers[p]);
//in case malloc returned more than the requested amount
buffer_size -= buffer_size % sizeof(T);
unsigned char *end_of_buffer = buffers[p] + buffer_size;
for(unsigned char *last_position = buffers[p];last_position < end_of_buffer; last_position += sizeof(T))
{
if(free_set.find(last_position) == free_set.end())
{
if(op.Accept((Record *&)last_position))
return true;
}
}
}
return false;
}
void MakeFreeSet(boost::unordered_set<unsigned char *> &free_set)
{
if(freed_position)
{
unsigned char *next_position = *(unsigned char **)freed_position;
free_set.insert(freed_position);
while(next_position != NULL)
{
free_set.insert(next_position);
next_position = *(unsigned char **)next_position;
};
}
}
void MakeFreeVector(std::vector<unsigned char *> &free_vector)
{
if(freed_position)
{
unsigned char *next_position = *(unsigned char **)freed_position;
free_vector.push_back(freed_position);
while(next_position != NULL)
{
free_vector.push_back(next_position);
next_position = *(unsigned char **)next_position;
};
std::sort(free_vector.begin(), free_vector.end());
}
}
void MakeRecordsVector(std::vector<Record *> &Records)
{
boost::unordered_set<unsigned char *> free_set;
MakeFreeSet(free_set);
Records.reserve(object_capacity() - free_set.size());
for(UINT32 p = 0;p < buffers.size(); p++)
{
UINT32 buffer_size = (UINT32)_msize(buffers[p]);
//in case malloc returned more than the requested amount
buffer_size -= buffer_size % sizeof(T);
unsigned char *end_of_buffer = buffers[p] + buffer_size;
for(unsigned char *last_position = buffers[p];last_position < end_of_buffer; last_position += sizeof(T))
{
if(free_set.find(last_position) == free_set.end())
Records.push_back((Record *)last_position);
}
}
}
void MakeRecordsArray(RECORDIDARRAY Records)
{
boost::unordered_set<unsigned char *> free_set;
MakeFreeSet(free_set);
UINT32 pos = 0;
for(UINT32 p = 0;p < buffers.size(); p++)
{
UINT32 buffer_size = (UINT32)_msize(buffers[p]);
//in case malloc returned more than the requested amount
buffer_size -= buffer_size % sizeof(T);
unsigned char *end_of_buffer = buffers[p] + buffer_size;
for(unsigned char *last_position = buffers[p];last_position < end_of_buffer; last_position += sizeof(T))
{
if(free_set.find(last_position) == free_set.end())
((RECORDIDARRAY)Records)[pos++] = (Record *)last_position;
}
}
}
void add_buffer(unsigned char *buffer)
{
buffers.push_back(buffer);
return;
}
};
//template<class T, UINT32 AllocUnit>
//class PODPoolAllocator
// {
// private:
// unsigned char *freed_position;
// std::vector<unsigned char *> buffers;
//
// public:
// PODPoolAllocator():
// freed_position(NULL)
// {
// //reserve(AllocUnit);
// }
//
// ~PODPoolAllocator()
// {
// purge_no_destructors();
// }
//
// void purge_no_destructors()
// {
// for(UINT32 p = 0;p < buffers.size(); p++)
// free(buffers[p]);
// buffers.clear();
// //_heapmin();
// freed_position = NULL;
// }
//
// void reserve(UINT32 elements)
// {
// //Allocate memory
// UINT32 buffer_size = sizeof(T) * elements;
// unsigned char *buffer = (unsigned char *)malloc(buffer_size);
// if(buffer == 0)
// throw std::bad_alloc();
// //memset(buffer, 0x00, buffer_size);
//
// //Populate the free linked list in reverse so that the first freed_position is at the beginning of the buffer
// //unsigned char *end_of_buffer = buffer + buffer_size;
// for(unsigned char *last_position = buffer + buffer_size - sizeof(T);last_position >= buffer; last_position -= sizeof(T))
// {
// *(unsigned char **)last_position = freed_position;
// freed_position = last_position;
// }
//
// //Save the buffer so it can be deallocated later
// buffers.push_back(buffer);
// }
//
// Record *construct()
// {
// //See if any memory is free
// if(freed_position)
// {
// unsigned char *next_position = *(unsigned char **)freed_position;
// Record * curRecord = new (freed_position) T();
// freed_position = next_position;
// return curRecord;
// }
// //Otherwise, allocate more memory
// else
// {
// reserve(AllocUnit);
// return construct(recData);
// }
// throw std::bad_alloc();
// return NULL;
// }
//
// void deallocate(T *curPOD)
// {
// if(curPOD == NULL)
// return;
// *(unsigned char **)curPOD = freed_position;
// freed_position = (unsigned char *)curPOD;
// }
//
// UINT32 object_capacity()
// {
// UINT32 size = 0;
// for(UINT32 p = 0;p < buffers.size(); p++)
// {
// UINT32 buffer_size = (UINT32)_msize(buffers[p]);
// //in case malloc returned more than the requested amount
// buffer_size -= buffer_size % sizeof(T);
// size += buffer_size / sizeof(T);
// }
//
// return size;
// }
//
// UINT32 free_object_capacity()
// {
// UINT32 size = 0;
//
// if(freed_position)
// {
// size++;
// unsigned char *next_position = *(unsigned char **)freed_position;
// while(next_position != NULL)
// {
// size++;
// next_position = *(unsigned char **)next_position;
// };
// }
//
// return size;
// }
//
// UINT32 used_object_capacity()
// {
// return object_capacity() - free_object_capacity();
// }
//
// UINT32 bytes_capacity()
// {
// UINT32 size = 0;
// for(UINT32 p = 0;p < buffers.size(); p++)
// {
// UINT32 buffer_size = (UINT32)_msize(buffers[p]);
// //in case malloc returned more than the requested amount
// buffer_size -= buffer_size % sizeof(T);
// size += buffer_size;
// }
//
// return size;
// }
//
// UINT32 free_bytes_capacity()
// {
// UINT32 size = 0;
//
// if(freed_position)
// {
// size++;
// unsigned char *next_position = *(unsigned char **)freed_position;
// while(next_position != NULL)
// {
// size++;
// next_position = *(unsigned char **)next_position;
// };
// }
//
// return size * sizeof(T);
// }
//
// UINT32 used_bytes_capacity()
// {
// return bytes_capacity() - free_bytes_capacity();
// }
// };
//class StringPoolAllocator
// {
// private:
// static char null_term;
// PODPoolAllocator<4, 1024> pool4;
// PODPoolAllocator<6, 1024> pool6;
// PODPoolAllocator<8, 1024> pool8;
// PODPoolAllocator<10, 1024> pool10;
// PODPoolAllocator<12, 1024> pool12;
// PODPoolAllocator<14, 1024> pool14;
// PODPoolAllocator<16, 1024> pool16;
// PODPoolAllocator<18, 1024> pool18;
// PODPoolAllocator<20, 1024> pool20;
// PODPoolAllocator<22, 1024> pool22;
// PODPoolAllocator<24, 1024> pool24;
// PODPoolAllocator<26, 1024> pool26;
// PODPoolAllocator<28, 1024> pool28;
// PODPoolAllocator<30, 1024> pool30;
// PODPoolAllocator<32, 1024> pool32;
// PODPoolAllocator<34, 1024> pool34;
// PODPoolAllocator<36, 1024> pool36;
// PODPoolAllocator<38, 1024> pool38;
// PODPoolAllocator<40, 1024> pool40;
// PODPoolAllocator<48, 1024> pool48;
// PODPoolAllocator<56, 1024> pool56;
// PODPoolAllocator<64, 1024> pool64;
// PODPoolAllocator<128, 1024> pool128;
// PODPoolAllocator<256, 1024> pool256;
// unsigned char *freed_position;
// std::vector<char *> buffers;
//
// public:
// StringPoolAllocator():
// freed_position(NULL),
// null_term(0x00)
// {
// //reserve(AllocUnit);
// }
//
// ~StringPoolAllocator()
// {
// purge_no_destructors();
// }
//
// void purge_no_destructors()
// {
// for(UINT32 p = 0;p < buffers.size(); p++)
// free(buffers[p]);
// buffers.clear();
// //_heapmin();
// freed_position = NULL;
// }
//
// void reserve(UINT32 elements)
// {
// //Allocate memory
// UINT32 buffer_size = sizeof(T) * elements;
// unsigned char *buffer = (unsigned char *)malloc(buffer_size);
// if(buffer == 0)
// throw std::bad_alloc();
// //memset(buffer, 0x00, buffer_size);
//
// //Populate the free linked list in reverse so that the first freed_position is at the beginning of the buffer
// //unsigned char *end_of_buffer = buffer + buffer_size;
// for(unsigned char *last_position = buffer + buffer_size - sizeof(T);last_position >= buffer; last_position -= sizeof(T))
// {
// *(unsigned char **)last_position = freed_position;
// freed_position = last_position;
// }
//
// //Save the buffer so it can be deallocated later
// buffers.push_back(buffer);
// }
//
// Record *construct()
// {
// //See if any memory is free
// if(freed_position)
// {
// unsigned char *next_position = *(unsigned char **)freed_position;
// Record * curRecord = new (freed_position) T();
// freed_position = next_position;
// return curRecord;
// }
// //Otherwise, allocate more memory
// else
// {
// reserve(AllocUnit);
// return construct(recData);
// }
// throw std::bad_alloc();
// return NULL;
// }
//
// void deallocate(T *curPOD)
// {
// if(curPOD == NULL)
// return;
// *(unsigned char **)curPOD = freed_position;
// freed_position = (unsigned char *)curPOD;
// }
//
// UINT32 object_capacity()
// {
// UINT32 size = 0;
// for(UINT32 p = 0;p < buffers.size(); p++)
// {
// UINT32 buffer_size = (UINT32)_msize(buffers[p]);
// //in case malloc returned more than the requested amount
// buffer_size -= buffer_size % sizeof(T);
// size += buffer_size / sizeof(T);
// }
//
// return size;
// }
//
// UINT32 free_object_capacity()
// {
// UINT32 size = 0;
//
// if(freed_position)
// {
// size++;
// unsigned char *next_position = *(unsigned char **)freed_position;
// while(next_position != NULL)
// {
// size++;
// next_position = *(unsigned char **)next_position;
// };
// }
//
// return size;
// }
//
// UINT32 used_object_capacity()
// {
// return object_capacity() - free_object_capacity();
// }
//
// UINT32 bytes_capacity()
// {
// UINT32 size = 0;
// for(UINT32 p = 0;p < buffers.size(); p++)
// {
// UINT32 buffer_size = (UINT32)_msize(buffers[p]);
// //in case malloc returned more than the requested amount
// buffer_size -= buffer_size % sizeof(T);
// size += buffer_size;
// }
//
// return size;
// }
//
// UINT32 free_bytes_capacity()
// {
// UINT32 size = 0;
//
// if(freed_position)
// {
// size++;
// unsigned char *next_position = *(unsigned char **)freed_position;
// while(next_position != NULL)
// {
// size++;
// next_position = *(unsigned char **)next_position;
// };
// }
//
// return size * sizeof(T);
// }
//
// UINT32 used_bytes_capacity()
// {
// return bytes_capacity() - free_bytes_capacity();
// }
// };