Bullet Collision Detection & Physics Library
btGenericPoolAllocator.h
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1
6/*
7Bullet Continuous Collision Detection and Physics Library
8Copyright (c) 2003-2006 Erwin Coumans http://continuousphysics.com/Bullet/
9
10This software is provided 'as-is', without any express or implied warranty.
11In no event will the authors be held liable for any damages arising from the use of this software.
12Permission is granted to anyone to use this software for any purpose,
13including commercial applications, and to alter it and redistribute it freely,
14subject to the following restrictions:
15
161. 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.
172. Altered source versions must be plainly marked as such, and must not be misrepresented as being the original software.
183. This notice may not be removed or altered from any source distribution.
19*/
20
21#ifndef BT_GENERIC_POOL_ALLOCATOR_H
22#define BT_GENERIC_POOL_ALLOCATOR_H
23
24#include <limits.h>
25#include <stdio.h>
26#include <string.h>
28
29#define BT_UINT_MAX UINT_MAX
30#define BT_DEFAULT_MAX_POOLS 16
31
32
35{
36public:
37 unsigned char * m_pool; //[m_element_size*m_max_element_count];
38 size_t * m_free_nodes; //[m_max_element_count];//! free nodes
39 size_t * m_allocated_sizes;//[m_max_element_count];//! Number of elements allocated per node
42protected:
45
46 size_t allocate_from_free_nodes(size_t num_elements);
47 size_t allocate_from_pool(size_t num_elements);
48
49public:
50
51 void init_pool(size_t element_size, size_t element_count);
52
53 void end_pool();
54
55
56 btGenericMemoryPool(size_t element_size, size_t element_count)
57 {
58 init_pool(element_size, element_count);
59 }
60
62 {
63 end_pool();
64 }
65
66
67 inline size_t get_pool_capacity()
68 {
70 }
71
72 inline size_t gem_element_size()
73 {
74 return m_element_size;
75 }
76
77 inline size_t get_max_element_count()
78 {
80 }
81
82 inline size_t get_allocated_count()
83 {
84 return m_allocated_count;
85 }
86
88 {
89 return m_free_nodes_count;
90 }
91
92 inline void * get_element_data(size_t element_index)
93 {
94 return &m_pool[element_index*m_element_size];
95 }
96
98
101 void * allocate(size_t size_bytes);
102
103 bool freeMemory(void * pointer);
104};
105
106
107
108
110
114{
115protected:
118public:
121
122
123 inline size_t get_pool_capacity()
124 {
126 }
127
128
129protected:
130 // creates a pool
132
133 void * failback_alloc(size_t size_bytes);
134
135 bool failback_free(void * pointer);
136public:
137
138 btGenericPoolAllocator(size_t pool_element_size, size_t pool_element_count)
139 {
140 m_pool_count = 0;
141 m_pool_element_size = pool_element_size;
142 m_pool_element_count = pool_element_count;
143 }
144
145 virtual ~btGenericPoolAllocator();
146
148
151 void * allocate(size_t size_bytes);
152
153 bool freeMemory(void * pointer);
154};
155
156
157
158void * btPoolAlloc(size_t size);
159void * btPoolRealloc(void *ptr, size_t oldsize, size_t newsize);
160void btPoolFree(void *ptr);
161
162
163#endif
static DBVT_INLINE btScalar size(const btDbvtVolume &a)
Definition: btDbvt.cpp:52
#define BT_DEFAULT_MAX_POOLS
void * btPoolRealloc(void *ptr, size_t oldsize, size_t newsize)
void * btPoolAlloc(size_t size)
void btPoolFree(void *ptr)
Generic Pool class.
void * get_element_data(size_t element_index)
btGenericMemoryPool(size_t element_size, size_t element_count)
bool freeMemory(void *pointer)
size_t allocate_from_pool(size_t num_elements)
void init_pool(size_t element_size, size_t element_count)
size_t allocate_from_free_nodes(size_t num_elements)
*************** btGenericMemoryPool ******************‍///////////
void * allocate(size_t size_bytes)
Allocates memory in pool.
Generic Allocator with pools.
btGenericMemoryPool * push_new_pool()
virtual ~btGenericPoolAllocator()
*******************! btGenericPoolAllocator *******************!///
btGenericMemoryPool * m_pools[BT_DEFAULT_MAX_POOLS]
void * failback_alloc(size_t size_bytes)
bool failback_free(void *pointer)
btGenericPoolAllocator(size_t pool_element_size, size_t pool_element_count)
void * allocate(size_t size_bytes)
Allocates memory in pool.