2013-04-19 02:52:48 +00:00
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////////////////////////////////////////////////////////////////////////////////////////
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// RAVEN STANDARD TEMPLATE LIBRARY
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// (c) 2002 Activision
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//
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//
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// Memory Pool
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// -----------
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// The memory pool class is a simple routine for constant time allocation and deallocation
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// from a fixed size pool of objects. The class uses a simple array to hold the actual
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// data, a queue for the free list, and a bit field to mark which spots in the array
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// are allocated.
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//
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//
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//
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// NOTES:
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//
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//
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//
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_POOL_VS_INC)
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#define RATL_POOL_VS_INC
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////////////////////////////////////////////////////////////////////////////////////////
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// Includes
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////////////////////////////////////////////////////////////////////////////////////////
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#if !defined(RATL_COMMON_INC)
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#include "ratl_common.h"
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#endif
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#if !defined(RATL_QUEUE_VS_INC)
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#include "queue_vs.h"
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#endif
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namespace ratl
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{
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// fixme, this could be made more efficient by keepingtrack of the highest slot ever used
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// then there is no need to fill the free list
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template <class T>
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class pool_root : public ratl_base
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{
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public:
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2013-04-21 05:00:23 +00:00
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typedef T TStorageTraits;
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2013-04-19 02:52:48 +00:00
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typedef typename T::TValue TTValue;
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////////////////////////////////////////////////////////////////////////////////////
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// Capacity Enum
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////////////////////////////////////////////////////////////////////////////////////
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enum
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{
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CAPACITY = T::CAPACITY
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};
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private:
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////////////////////////////////////////////////////////////////////////////////////
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// Data
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////////////////////////////////////////////////////////////////////////////////////
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array_base<TStorageTraits> mData;
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queue_vs<int, CAPACITY> mFree;
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bits_base<CAPACITY> mUsed;
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int mSize;
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void FillFreeList()
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{
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mFree.clear();
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int i;
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for (i=0;i<CAPACITY;i++)
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{
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mFree.push(i);
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}
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}
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int alloc_low()
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{
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assert(mSize<CAPACITY);
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assert(!mUsed[mFree.top()]);
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int NextIndex = mFree.top(); // Get The First Available Location
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mUsed.set_bit(NextIndex);
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mFree.pop();
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mSize ++;
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return NextIndex;
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}
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public:
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////////////////////////////////////////////////////////////////////////////////////
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// Constructor
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////////////////////////////////////////////////////////////////////////////////////
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pool_root() : mSize(0)
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{
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FillFreeList();
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Number Of Objects Allocated
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////////////////////////////////////////////////////////////////////////////////////
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int size() const
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{
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return (mSize);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If This Memory Pool Is Empty
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////////////////////////////////////////////////////////////////////////////////////
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bool empty() const
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{
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return (mSize==0);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check To See If This Memory Pool Is Full
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////////////////////////////////////////////////////////////////////////////////////
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bool full() const
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{
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return (mSize==CAPACITY);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Constant Accessor
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////////////////////////////////////////////////////////////////////////////////////
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const TTValue& value_at_index(int i) const
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{
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assert(mUsed[i]);
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return (mData[i]);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Accessor
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////////////////////////////////////////////////////////////////////////////////////
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TTValue& value_at_index(int i)
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{
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assert(mUsed[i]);
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return (mData[i]);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Clear - Removes all allocation information
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////////////////////////////////////////////////////////////////////////////////////
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void clear()
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{
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mSize = 0;
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mUsed.clear();
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mData.clear();
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FillFreeList();
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Check If An Index Has Been Allocated
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////////////////////////////////////////////////////////////////////////////////////
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bool is_used_index(int i) const
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{
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return mUsed[i];
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Convert a pointer back to an index
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////////////////////////////////////////////////////////////////////////////////////
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int pointer_to_index(const TTValue *me) const
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{
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assert(mSize>0);
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int index=mData.pointer_to_index(me);
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assert(index>=0 && index<CAPACITY);
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assert(mUsed[index]); // I am disallowing obtaining the index of a freed item
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return index;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Convert a pointer back to an index
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////////////////////////////////////////////////////////////////////////////////////
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int pointer_to_index(const TRatlNew *me) const
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{
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assert(mSize>0);
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int index=mData.pointer_to_index(me);
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assert(index>=0 && index<CAPACITY);
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assert(mUsed[index]); // I am disallowing obtaining the index of a freed item
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return index;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Swap two items based on index
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////////////////////////////////////////////////////////////////////////////////////
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void swap_index(int i,int j)
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{
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assert(i>=0 && i<CAPACITY);
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assert(j>=0 && j<CAPACITY);
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mData.swap(i,j);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Allocator
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////////////////////////////////////////////////////////////////////////////////////
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int alloc_index()
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{
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int NextIndex = alloc_low();
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mData.construct(NextIndex);
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return NextIndex;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Allocator
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////////////////////////////////////////////////////////////////////////////////////
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int alloc_index(const TTValue &v)
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{
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int NextIndex = alloc_low();
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mData.construct(NextIndex,v);
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return NextIndex;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Allocator
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////////////////////////////////////////////////////////////////////////////////////
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TRatlNew * alloc_raw()
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{
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int NextIndex = alloc_low();
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return mData.alloc_raw(NextIndex);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Deallocator
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////////////////////////////////////////////////////////////////////////////////////
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void free_index(int i)
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{
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assert(mSize>0);
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assert(i>=0 && i<CAPACITY);
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assert(mUsed[i]);
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mData.destruct(i);
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mUsed.clear_bit(i);
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mFree.push(i);
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mSize --;
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}
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////////////////////////////////////////////////////////////////////////////////////
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// The Deallocator
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////////////////////////////////////////////////////////////////////////////////////
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void free(TTValue *me)
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{
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free(pointer_to_index(me));
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Iterator
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////////////////////////////////////////////////////////////////////////////////////
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class const_iterator;
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class iterator
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{
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friend class pool_root<T>;
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friend class const_iterator;
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int mIndex;
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pool_root<T>* mOwner;
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public:
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// Constructors
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//--------------
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iterator() : mOwner(0)
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{}
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iterator(pool_root<T>* p, int index) : mOwner(p), mIndex(index)
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{}
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iterator(const iterator &t) : mOwner(t.mOwner), mIndex(t.mIndex)
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{}
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// Assignment Operator
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//---------------------
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void operator= (const iterator &t)
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{
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mOwner = t.mOwner;
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mIndex = t.mIndex;
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}
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// Equality Operators
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//--------------------
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bool operator!=(const iterator& t) {assert(mOwner && mOwner==t.mOwner); return (mIndex!=t.mIndex);}
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bool operator==(const iterator& t) {assert(mOwner && mOwner==t.mOwner); return (mIndex==t.mIndex);}
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// Dereference Operators
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//----------------------
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TTValue& operator* () const {assert(mOwner && mOwner->is_used_index(mIndex)); return (mOwner->mData[mIndex]);}
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TTValue* operator->() const {assert(mOwner && mOwner->is_used_index(mIndex)); return (&mOwner->mData[mIndex]);}
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// Handle & Index Access
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//-----------------------
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int index() {assert(mOwner && mOwner->is_used_index(mIndex)); return mIndex;}
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// Inc Operator
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//-------------
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iterator operator++(int) // postfix
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{
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assert(mIndex>=0&&mIndex<CAPACITY); // this typically means you did end()++
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assert(mOwner && mOwner->is_used_index(mIndex));
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iterator ret(*this);
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mIndex = mOwner->mUsed.next_bit(mIndex+1);
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return ret;
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}
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// Inc Operator
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//-------------
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iterator operator++() // prefix
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{
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assert(mIndex>=0&&mIndex<CAPACITY); // this typically means you did end()++
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assert(mOwner && mOwner->is_used_index(mIndex));
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mIndex = mOwner->mUsed.next_bit(mIndex+1);
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return *this;
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}
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};
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friend class iterator;
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////////////////////////////////////////////////////////////////////////////////////
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// Iterator
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////////////////////////////////////////////////////////////////////////////////////
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class const_iterator
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{
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int mIndex;
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const pool_root<T>* mOwner;
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public:
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// Constructors
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//--------------
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const_iterator() : mOwner(0)
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{}
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const_iterator(const pool_root<T>* p, int index) : mOwner(p), mIndex(index)
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{}
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const_iterator(const iterator &t) : mOwner(t.mOwner), mIndex(t.mIndex)
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{}
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const_iterator(const const_iterator &t) : mOwner(t.mOwner), mIndex(t.mIndex)
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{}
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// Equality Operators
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//--------------------
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bool operator!=(const const_iterator& t) const {assert(mOwner && mOwner==t.mOwner); return (mIndex!=t.mIndex);}
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bool operator==(const const_iterator& t) const {assert(mOwner && mOwner==t.mOwner); return (mIndex==t.mIndex);}
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bool operator!=(const iterator& t) const {assert(mOwner && mOwner==t.mOwner); return (mIndex!=t.mIndex);}
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bool operator==(const iterator& t) const {assert(mOwner && mOwner==t.mOwner); return (mIndex==t.mIndex);}
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// Dereference Operators
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//----------------------
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const TTValue& operator* () const {assert(mOwner && mOwner->is_used_index(mIndex)); return (mOwner->mData[mIndex]);}
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const TTValue* operator->() const {assert(mOwner && mOwner->is_used_index(mIndex)); return (&mOwner->mData[mIndex]);}
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// Handle & Index Access
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//-----------------------
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int index() const {assert(mOwner && mOwner->is_used_index(mIndex)); return mIndex;}
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// Inc Operator
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//-------------
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const_iterator operator++(int) // postfix
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{
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assert(mIndex>=0&&mIndex<CAPACITY); // this typically means you did end()++
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assert(mOwner && mOwner->is_used_index(mIndex));
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const_iterator ret(*this);
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mIndex = mOwner->mUsed.next_bit(mIndex+1);
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return ret;
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}
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// Inc Operator
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//-------------
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const_iterator operator++() // prefix
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{
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assert(mIndex>=0&&mIndex<CAPACITY); // this typically means you did end()++
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assert(mOwner && mOwner->is_used_index(mIndex));
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mIndex = mOwner->mUsed.next_bit(mIndex+1);
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return *this;
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}
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};
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friend class const_iterator;
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////////////////////////////////////////////////////////////////////////////////////
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// Get An Iterator To The First Allocated Memory Block
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////////////////////////////////////////////////////////////////////////////////////
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iterator begin()
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{
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int idx=mUsed.next_bit(0);
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return iterator(this,idx); // Find The First Allocated
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get An Iterator To The Object At index
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////////////////////////////////////////////////////////////////////////////////////
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iterator at_index(int index)
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{
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assert(mUsed[index]); // disallow iterators to non alloced things
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return iterator(this, index);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get An Iterator To The End Of The Memroy (One Step Beyond)
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////////////////////////////////////////////////////////////////////////////////////
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iterator end()
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{
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return iterator(this, CAPACITY);
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get An Iterator To The First Allocated Memory Block
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////////////////////////////////////////////////////////////////////////////////////
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const_iterator begin() const
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{
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int idx=mUsed.next_bit(0);
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return iterator(this,idx); // Find The First Allocated
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}
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////////////////////////////////////////////////////////////////////////////////////
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// Get An Iterator To The Object At index
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////////////////////////////////////////////////////////////////////////////////////
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const_iterator at_index(int index) const
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{
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assert(mUsed[index]); // disallow iterators to non alloced things
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return iterator(this, index);
|
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Get An Iterator To The End Of The Memroy (One Step Beyond)
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
const_iterator end() const
|
|
|
|
{
|
|
|
|
return iterator(this, CAPACITY);
|
|
|
|
}
|
|
|
|
|
|
|
|
template<class CAST_TO>
|
|
|
|
CAST_TO *verify_alloc(CAST_TO *p) const
|
|
|
|
{
|
|
|
|
return mData.verify_alloc(p);
|
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
/*
|
|
|
|
pool_base, base class for the pools
|
|
|
|
|
|
|
|
operations:
|
|
|
|
|
|
|
|
size()
|
|
|
|
empty()
|
|
|
|
full()
|
|
|
|
clear() op[]
|
|
|
|
at_index() op[]
|
|
|
|
at_index() const
|
|
|
|
index pointer_to_index(ptr)
|
|
|
|
index alloc_index() alloc()
|
|
|
|
index alloc_index(ref) alloc()
|
|
|
|
ptr alloc_raw()
|
|
|
|
free_index(index)
|
|
|
|
free(ptr)
|
|
|
|
is_used_index(index)
|
|
|
|
|
|
|
|
*/
|
|
|
|
|
|
|
|
template <class T>
|
|
|
|
class pool_base : public pool_root<T>
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
typedef typename T::TValue TTValue;
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Constant Accessor
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
const TTValue& operator[](int i) const
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->value_at_index(i);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Accessor
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
TTValue& operator[](int i)
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->value_at_index(i);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
bool is_used(int i) const
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->is_used_index(i);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Swap two items based on index
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void swap(int i,int j)
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
this->swap_index(i,j);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// The Allocator returns an index
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int alloc()
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->alloc_index();
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// The Allocator returns an index
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
int alloc(const TTValue &v)
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->alloc_index(v);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// The Deallocator
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
void free(int i)
|
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
this->free_index(i);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Get An Iterator To The Object At index
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
2013-04-21 05:00:23 +00:00
|
|
|
typename pool_root<T>::iterator at(int index)
|
2013-04-19 02:52:48 +00:00
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->at_index(index);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
|
|
|
// Get An Iterator To The Object At index
|
|
|
|
////////////////////////////////////////////////////////////////////////////////////
|
2013-04-21 05:00:23 +00:00
|
|
|
typename pool_root<T>::const_iterator at(int index) const
|
2013-04-19 02:52:48 +00:00
|
|
|
{
|
2013-04-21 05:00:23 +00:00
|
|
|
return this->at_index(index);
|
2013-04-19 02:52:48 +00:00
|
|
|
}
|
|
|
|
};
|
|
|
|
|
|
|
|
template<class T, int ARG_CAPACITY>
|
|
|
|
class pool_vs : public pool_base<storage::value_semantics<T,ARG_CAPACITY> >
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
typedef typename storage::value_semantics<T,ARG_CAPACITY> TStorageTraits;
|
|
|
|
typedef typename TStorageTraits::TValue TTValue;
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
CAPACITY = ARG_CAPACITY
|
|
|
|
};
|
|
|
|
pool_vs() {}
|
|
|
|
};
|
|
|
|
|
|
|
|
template<class T, int ARG_CAPACITY>
|
|
|
|
class pool_os : public pool_base<storage::object_semantics<T,ARG_CAPACITY> >
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
typedef typename storage::object_semantics<T,ARG_CAPACITY> TStorageTraits;
|
|
|
|
typedef typename TStorageTraits::TValue TTValue;
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
CAPACITY = ARG_CAPACITY
|
|
|
|
};
|
|
|
|
pool_os() {}
|
|
|
|
};
|
|
|
|
|
|
|
|
template<class T, int ARG_CAPACITY, int ARG_MAX_CLASS_SIZE>
|
|
|
|
class pool_is : public pool_base<storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> >
|
|
|
|
{
|
|
|
|
public:
|
|
|
|
typedef typename storage::virtual_semantics<T,ARG_CAPACITY,ARG_MAX_CLASS_SIZE> TStorageTraits;
|
|
|
|
typedef typename TStorageTraits::TValue TTValue;
|
|
|
|
enum
|
|
|
|
{
|
|
|
|
CAPACITY = ARG_CAPACITY,
|
|
|
|
MAX_CLASS_SIZE = ARG_MAX_CLASS_SIZE
|
|
|
|
};
|
|
|
|
pool_is() {}
|
|
|
|
};
|
|
|
|
|
|
|
|
}
|
2013-04-21 05:00:23 +00:00
|
|
|
#endif
|