/usr/include/bullet/Bullet3Common/b3ResizablePool.h is in libbullet-dev 2.87+dfsg-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 | #ifndef B3_RESIZABLE_POOL_H
#define B3_RESIZABLE_POOL_H
#include "Bullet3Common/b3AlignedObjectArray.h"
enum
{
B3_POOL_HANDLE_TERMINAL_FREE=-1,
B3_POOL_HANDLE_TERMINAL_USED =-2
};
template <typename U>
struct b3PoolBodyHandle : public U
{
B3_DECLARE_ALIGNED_ALLOCATOR();
int m_nextFreeHandle;
void setNextFree(int next)
{
m_nextFreeHandle = next;
}
int getNextFree() const
{
return m_nextFreeHandle;
}
};
template <typename T>
class b3ResizablePool
{
protected:
b3AlignedObjectArray<T> m_bodyHandles;
int m_numUsedHandles; // number of active handles
int m_firstFreeHandle; // free handles list
T* getHandleInternal(int handle)
{
return &m_bodyHandles[handle];
}
const T* getHandleInternal(int handle) const
{
return &m_bodyHandles[handle];
}
public:
b3ResizablePool()
{
initHandles();
}
virtual ~b3ResizablePool()
{
exitHandles();
}
///handle management
int getNumHandles() const
{
return m_bodyHandles.size();
}
void getUsedHandles(b3AlignedObjectArray<int>& usedHandles) const
{
for (int i=0;i<m_bodyHandles.size();i++)
{
if (m_bodyHandles[i].getNextFree()==B3_POOL_HANDLE_TERMINAL_USED)
{
usedHandles.push_back(i);
}
}
}
T* getHandle(int handle)
{
b3Assert(handle>=0);
b3Assert(handle<m_bodyHandles.size());
if ((handle<0) || (handle>=m_bodyHandles.size()))
{
return 0;
}
if (m_bodyHandles[handle].getNextFree()==B3_POOL_HANDLE_TERMINAL_USED)
{
return &m_bodyHandles[handle];
}
return 0;
}
const T* getHandle(int handle) const
{
b3Assert(handle>=0);
b3Assert(handle<m_bodyHandles.size());
if ((handle<0) || (handle>=m_bodyHandles.size()))
{
return 0;
}
if (m_bodyHandles[handle].getNextFree()==B3_POOL_HANDLE_TERMINAL_USED)
{
return &m_bodyHandles[handle];
}
return 0;
}
void increaseHandleCapacity(int extraCapacity)
{
int curCapacity = m_bodyHandles.size();
//b3Assert(curCapacity == m_numUsedHandles);
int newCapacity = curCapacity + extraCapacity;
m_bodyHandles.resize(newCapacity);
{
for (int i = curCapacity; i < newCapacity; i++)
m_bodyHandles[i].setNextFree(i + 1);
m_bodyHandles[newCapacity - 1].setNextFree(-1);
}
m_firstFreeHandle = curCapacity;
}
void initHandles()
{
m_numUsedHandles = 0;
m_firstFreeHandle = -1;
increaseHandleCapacity(1);
}
void exitHandles()
{
m_bodyHandles.resize(0);
m_firstFreeHandle = -1;
m_numUsedHandles = 0;
}
int allocHandle()
{
b3Assert(m_firstFreeHandle>=0);
int handle = m_firstFreeHandle;
m_firstFreeHandle = getHandleInternal(handle)->getNextFree();
m_numUsedHandles++;
if (m_firstFreeHandle<0)
{
//int curCapacity = m_bodyHandles.size();
int additionalCapacity= m_bodyHandles.size();
increaseHandleCapacity(additionalCapacity);
getHandleInternal(handle)->setNextFree(m_firstFreeHandle);
}
getHandleInternal(handle)->setNextFree(B3_POOL_HANDLE_TERMINAL_USED);
getHandleInternal(handle)->clear();
return handle;
}
void freeHandle(int handle)
{
b3Assert(handle >= 0);
if (m_bodyHandles[handle].getNextFree()==B3_POOL_HANDLE_TERMINAL_USED)
{
getHandleInternal(handle)->clear();
getHandleInternal(handle)->setNextFree(m_firstFreeHandle);
m_firstFreeHandle = handle;
m_numUsedHandles--;
}
}
};
///end handle management
#endif //B3_RESIZABLE_POOL_H
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