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authorRĂ©mi Verschelde <rverschelde@gmail.com>2018-01-13 14:43:30 +0100
committerGitHub <noreply@github.com>2018-01-13 14:43:30 +0100
commita3ee252993e8200c856be3fe664937f9461ee268 (patch)
treeaf68e434545e20c538f896e28b73f2db7d626edd /thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h
parentc01575b3125ce1828f0cacb3f9f00286136f373c (diff)
parente12c89e8c9896b2e5cdd70dbd2d2acb449ff4b94 (diff)
Merge pull request #15664 from akien-mga/thirdparty
Bugfix updates to various thirdparty libraries
Diffstat (limited to 'thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h')
-rw-r--r--thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h533
1 files changed, 533 insertions, 0 deletions
diff --git a/thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h b/thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h
new file mode 100644
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+++ b/thirdparty/bullet/Bullet3Common/b3AlignedObjectArray.h
@@ -0,0 +1,533 @@
+/*
+Bullet Continuous Collision Detection and Physics Library
+Copyright (c) 2003-2013 Erwin Coumans http://bulletphysics.org
+
+This software is provided 'as-is', without any express or implied warranty.
+In no event will the authors be held liable for any damages arising from the use of this software.
+Permission is granted to anyone to use this software for any purpose,
+including commercial applications, and to alter it and redistribute it freely,
+subject to the following restrictions:
+
+1. The origin of this software must not be misrepresented; you must not claim that you wrote the original software. If you use this software in a product, an acknowledgment in the product documentation would be appreciated but is not required.
+2. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
+3. This notice may not be removed or altered from any source distribution.
+*/
+
+
+#ifndef B3_OBJECT_ARRAY__
+#define B3_OBJECT_ARRAY__
+
+#include "b3Scalar.h" // has definitions like B3_FORCE_INLINE
+#include "b3AlignedAllocator.h"
+
+///If the platform doesn't support placement new, you can disable B3_USE_PLACEMENT_NEW
+///then the b3AlignedObjectArray doesn't support objects with virtual methods, and non-trivial constructors/destructors
+///You can enable B3_USE_MEMCPY, then swapping elements in the array will use memcpy instead of operator=
+///see discussion here: http://continuousphysics.com/Bullet/phpBB2/viewtopic.php?t=1231 and
+///http://www.continuousphysics.com/Bullet/phpBB2/viewtopic.php?t=1240
+
+#define B3_USE_PLACEMENT_NEW 1
+//#define B3_USE_MEMCPY 1 //disable, because it is cumbersome to find out for each platform where memcpy is defined. It can be in <memory.h> or <string.h> or otherwise...
+#define B3_ALLOW_ARRAY_COPY_OPERATOR // enabling this can accidently perform deep copies of data if you are not careful
+
+#ifdef B3_USE_MEMCPY
+#include <memory.h>
+#include <string.h>
+#endif //B3_USE_MEMCPY
+
+#ifdef B3_USE_PLACEMENT_NEW
+#include <new> //for placement new
+#endif //B3_USE_PLACEMENT_NEW
+
+
+///The b3AlignedObjectArray template class uses a subset of the stl::vector interface for its methods
+///It is developed to replace stl::vector to avoid portability issues, including STL alignment issues to add SIMD/SSE data
+template <typename T>
+//template <class T>
+class b3AlignedObjectArray
+{
+ b3AlignedAllocator<T , 16> m_allocator;
+
+ int m_size;
+ int m_capacity;
+ T* m_data;
+ //PCK: added this line
+ bool m_ownsMemory;
+
+#ifdef B3_ALLOW_ARRAY_COPY_OPERATOR
+public:
+ B3_FORCE_INLINE b3AlignedObjectArray<T>& operator=(const b3AlignedObjectArray<T> &other)
+ {
+ copyFromArray(other);
+ return *this;
+ }
+#else//B3_ALLOW_ARRAY_COPY_OPERATOR
+private:
+ B3_FORCE_INLINE b3AlignedObjectArray<T>& operator=(const b3AlignedObjectArray<T> &other);
+#endif//B3_ALLOW_ARRAY_COPY_OPERATOR
+
+protected:
+ B3_FORCE_INLINE int allocSize(int size)
+ {
+ return (size ? size*2 : 1);
+ }
+ B3_FORCE_INLINE void copy(int start,int end, T* dest) const
+ {
+ int i;
+ for (i=start;i<end;++i)
+#ifdef B3_USE_PLACEMENT_NEW
+ new (&dest[i]) T(m_data[i]);
+#else
+ dest[i] = m_data[i];
+#endif //B3_USE_PLACEMENT_NEW
+ }
+
+ B3_FORCE_INLINE void init()
+ {
+ //PCK: added this line
+ m_ownsMemory = true;
+ m_data = 0;
+ m_size = 0;
+ m_capacity = 0;
+ }
+ B3_FORCE_INLINE void destroy(int first,int last)
+ {
+ int i;
+ for (i=first; i<last;i++)
+ {
+ m_data[i].~T();
+ }
+ }
+
+ B3_FORCE_INLINE void* allocate(int size)
+ {
+ if (size)
+ return m_allocator.allocate(size);
+ return 0;
+ }
+
+ B3_FORCE_INLINE void deallocate()
+ {
+ if(m_data) {
+ //PCK: enclosed the deallocation in this block
+ if (m_ownsMemory)
+ {
+ m_allocator.deallocate(m_data);
+ }
+ m_data = 0;
+ }
+ }
+
+
+
+
+ public:
+
+ b3AlignedObjectArray()
+ {
+ init();
+ }
+
+ ~b3AlignedObjectArray()
+ {
+ clear();
+ }
+
+ ///Generally it is best to avoid using the copy constructor of an b3AlignedObjectArray, and use a (const) reference to the array instead.
+ b3AlignedObjectArray(const b3AlignedObjectArray& otherArray)
+ {
+ init();
+
+ int otherSize = otherArray.size();
+ resize (otherSize);
+ otherArray.copy(0, otherSize, m_data);
+ }
+
+
+
+ /// return the number of elements in the array
+ B3_FORCE_INLINE int size() const
+ {
+ return m_size;
+ }
+
+ B3_FORCE_INLINE const T& at(int n) const
+ {
+ b3Assert(n>=0);
+ b3Assert(n<size());
+ return m_data[n];
+ }
+
+ B3_FORCE_INLINE T& at(int n)
+ {
+ b3Assert(n>=0);
+ b3Assert(n<size());
+ return m_data[n];
+ }
+
+ B3_FORCE_INLINE const T& operator[](int n) const
+ {
+ b3Assert(n>=0);
+ b3Assert(n<size());
+ return m_data[n];
+ }
+
+ B3_FORCE_INLINE T& operator[](int n)
+ {
+ b3Assert(n>=0);
+ b3Assert(n<size());
+ return m_data[n];
+ }
+
+
+ ///clear the array, deallocated memory. Generally it is better to use array.resize(0), to reduce performance overhead of run-time memory (de)allocations.
+ B3_FORCE_INLINE void clear()
+ {
+ destroy(0,size());
+
+ deallocate();
+
+ init();
+ }
+
+ B3_FORCE_INLINE void pop_back()
+ {
+ b3Assert(m_size>0);
+ m_size--;
+ m_data[m_size].~T();
+ }
+
+
+ ///resize changes the number of elements in the array. If the new size is larger, the new elements will be constructed using the optional second argument.
+ ///when the new number of elements is smaller, the destructor will be called, but memory will not be freed, to reduce performance overhead of run-time memory (de)allocations.
+ B3_FORCE_INLINE void resizeNoInitialize(int newsize)
+ {
+ int curSize = size();
+
+ if (newsize < curSize)
+ {
+ } else
+ {
+ if (newsize > size())
+ {
+ reserve(newsize);
+ }
+ //leave this uninitialized
+ }
+ m_size = newsize;
+ }
+
+ B3_FORCE_INLINE void resize(int newsize, const T& fillData=T())
+ {
+ int curSize = size();
+
+ if (newsize < curSize)
+ {
+ for(int i = newsize; i < curSize; i++)
+ {
+ m_data[i].~T();
+ }
+ } else
+ {
+ if (newsize > size())
+ {
+ reserve(newsize);
+ }
+#ifdef B3_USE_PLACEMENT_NEW
+ for (int i=curSize;i<newsize;i++)
+ {
+ new ( &m_data[i]) T(fillData);
+ }
+#endif //B3_USE_PLACEMENT_NEW
+
+ }
+
+ m_size = newsize;
+ }
+ B3_FORCE_INLINE T& expandNonInitializing( )
+ {
+ int sz = size();
+ if( sz == capacity() )
+ {
+ reserve( allocSize(size()) );
+ }
+ m_size++;
+
+ return m_data[sz];
+ }
+
+
+ B3_FORCE_INLINE T& expand( const T& fillValue=T())
+ {
+ int sz = size();
+ if( sz == capacity() )
+ {
+ reserve( allocSize(size()) );
+ }
+ m_size++;
+#ifdef B3_USE_PLACEMENT_NEW
+ new (&m_data[sz]) T(fillValue); //use the in-place new (not really allocating heap memory)
+#endif
+
+ return m_data[sz];
+ }
+
+
+ B3_FORCE_INLINE void push_back(const T& _Val)
+ {
+ int sz = size();
+ if( sz == capacity() )
+ {
+ reserve( allocSize(size()) );
+ }
+
+#ifdef B3_USE_PLACEMENT_NEW
+ new ( &m_data[m_size] ) T(_Val);
+#else
+ m_data[size()] = _Val;
+#endif //B3_USE_PLACEMENT_NEW
+
+ m_size++;
+ }
+
+
+ /// return the pre-allocated (reserved) elements, this is at least as large as the total number of elements,see size() and reserve()
+ B3_FORCE_INLINE int capacity() const
+ {
+ return m_capacity;
+ }
+
+ B3_FORCE_INLINE void reserve(int _Count)
+ { // determine new minimum length of allocated storage
+ if (capacity() < _Count)
+ { // not enough room, reallocate
+ T* s = (T*)allocate(_Count);
+ b3Assert(s);
+ if (s==0)
+ {
+ b3Error("b3AlignedObjectArray reserve out-of-memory\n");
+ _Count=0;
+ m_size=0;
+ }
+ copy(0, size(), s);
+
+ destroy(0,size());
+
+ deallocate();
+
+ //PCK: added this line
+ m_ownsMemory = true;
+
+ m_data = s;
+
+ m_capacity = _Count;
+
+ }
+ }
+
+
+ class less
+ {
+ public:
+
+ bool operator() ( const T& a, const T& b )
+ {
+ return ( a < b );
+ }
+ };
+
+
+ template <typename L>
+ void quickSortInternal(const L& CompareFunc,int lo, int hi)
+ {
+ // lo is the lower index, hi is the upper index
+ // of the region of array a that is to be sorted
+ int i=lo, j=hi;
+ T x=m_data[(lo+hi)/2];
+
+ // partition
+ do
+ {
+ while (CompareFunc(m_data[i],x))
+ i++;
+ while (CompareFunc(x,m_data[j]))
+ j--;
+ if (i<=j)
+ {
+ swap(i,j);
+ i++; j--;
+ }
+ } while (i<=j);
+
+ // recursion
+ if (lo<j)
+ quickSortInternal( CompareFunc, lo, j);
+ if (i<hi)
+ quickSortInternal( CompareFunc, i, hi);
+ }
+
+
+ template <typename L>
+ void quickSort(const L& CompareFunc)
+ {
+ //don't sort 0 or 1 elements
+ if (size()>1)
+ {
+ quickSortInternal(CompareFunc,0,size()-1);
+ }
+ }
+
+
+ ///heap sort from http://www.csse.monash.edu.au/~lloyd/tildeAlgDS/Sort/Heap/
+ template <typename L>
+ void downHeap(T *pArr, int k, int n, const L& CompareFunc)
+ {
+ /* PRE: a[k+1..N] is a heap */
+ /* POST: a[k..N] is a heap */
+
+ T temp = pArr[k - 1];
+ /* k has child(s) */
+ while (k <= n/2)
+ {
+ int child = 2*k;
+
+ if ((child < n) && CompareFunc(pArr[child - 1] , pArr[child]))
+ {
+ child++;
+ }
+ /* pick larger child */
+ if (CompareFunc(temp , pArr[child - 1]))
+ {
+ /* move child up */
+ pArr[k - 1] = pArr[child - 1];
+ k = child;
+ }
+ else
+ {
+ break;
+ }
+ }
+ pArr[k - 1] = temp;
+ } /*downHeap*/
+
+ void swap(int index0,int index1)
+ {
+#ifdef B3_USE_MEMCPY
+ char temp[sizeof(T)];
+ memcpy(temp,&m_data[index0],sizeof(T));
+ memcpy(&m_data[index0],&m_data[index1],sizeof(T));
+ memcpy(&m_data[index1],temp,sizeof(T));
+#else
+ T temp = m_data[index0];
+ m_data[index0] = m_data[index1];
+ m_data[index1] = temp;
+#endif //B3_USE_PLACEMENT_NEW
+
+ }
+
+ template <typename L>
+ void heapSort(const L& CompareFunc)
+ {
+ /* sort a[0..N-1], N.B. 0 to N-1 */
+ int k;
+ int n = m_size;
+ for (k = n/2; k > 0; k--)
+ {
+ downHeap(m_data, k, n, CompareFunc);
+ }
+
+ /* a[1..N] is now a heap */
+ while ( n>=1 )
+ {
+ swap(0,n-1); /* largest of a[0..n-1] */
+
+
+ n = n - 1;
+ /* restore a[1..i-1] heap */
+ downHeap(m_data, 1, n, CompareFunc);
+ }
+ }
+
+ ///non-recursive binary search, assumes sorted array
+ int findBinarySearch(const T& key) const
+ {
+ int first = 0;
+ int last = size()-1;
+
+ //assume sorted array
+ while (first <= last) {
+ int mid = (first + last) / 2; // compute mid point.
+ if (key > m_data[mid])
+ first = mid + 1; // repeat search in top half.
+ else if (key < m_data[mid])
+ last = mid - 1; // repeat search in bottom half.
+ else
+ return mid; // found it. return position /////
+ }
+ return size(); // failed to find key
+ }
+
+
+ int findLinearSearch(const T& key) const
+ {
+ int index=size();
+ int i;
+
+ for (i=0;i<size();i++)
+ {
+ if (m_data[i] == key)
+ {
+ index = i;
+ break;
+ }
+ }
+ return index;
+ }
+
+ int findLinearSearch2(const T& key) const
+ {
+ int index=-1;
+ int i;
+
+ for (i=0;i<size();i++)
+ {
+ if (m_data[i] == key)
+ {
+ index = i;
+ break;
+ }
+ }
+ return index;
+ }
+
+ void remove(const T& key)
+ {
+
+ int findIndex = findLinearSearch(key);
+ if (findIndex<size())
+ {
+ swap( findIndex,size()-1);
+ pop_back();
+ }
+ }
+
+ //PCK: whole function
+ void initializeFromBuffer(void *buffer, int size, int capacity)
+ {
+ clear();
+ m_ownsMemory = false;
+ m_data = (T*)buffer;
+ m_size = size;
+ m_capacity = capacity;
+ }
+
+ void copyFromArray(const b3AlignedObjectArray& otherArray)
+ {
+ int otherSize = otherArray.size();
+ resize (otherSize);
+ otherArray.copy(0, otherSize, m_data);
+ }
+
+};
+
+#endif //B3_OBJECT_ARRAY__