Bullet Collision Detection & Physics Library: gim_memory.h Source File

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gim_memory.h
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1#ifndef GIM_MEMORY_H_INCLUDED
2#define GIM_MEMORY_H_INCLUDED
6/*
7-----------------------------------------------------------------------------
8This source file is part of GIMPACT Library.
9
10For the latest info, see http://gimpact.sourceforge.net/
11
12Copyright (c) 2006 Francisco Leon Najera. C.C. 80087371.
13email: projectileman@yahoo.com
14
15 This library is free software; you can redistribute it and/or
16 modify it under the terms of EITHER:
17 (1) The GNU Lesser General Public License as published by the Free
18 Software Foundation; either version 2.1 of the License, or (at
19 your option) any later version. The text of the GNU Lesser
20 General Public License is included with this library in the
21 file GIMPACT-LICENSE-LGPL.TXT.
22 (2) The BSD-style license that is included with this library in
23 the file GIMPACT-LICENSE-BSD.TXT.
24 (3) The zlib/libpng license that is included with this library in
25 the file GIMPACT-LICENSE-ZLIB.TXT.
26
27 This library is distributed in the hope that it will be useful,
28 but WITHOUT ANY WARRANTY; without even the implied warranty of
29 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the files
30 GIMPACT-LICENSE-LGPL.TXT, GIMPACT-LICENSE-ZLIB.TXT and GIMPACT-LICENSE-BSD.TXT for more details.
31
32-----------------------------------------------------------------------------
33*/
34
35#include "gim_math.h"
36#include <string.h>
37
38#ifdef PREFETCH
39#include <xmmintrin.h> // for prefetch
40#define pfval 64
41#define pfval2 128
43#define pf(_x, _i) _mm_prefetch((void *)(_x + _i + pfval), 0)
45#define pf2(_x, _i) _mm_prefetch((void *)(_x + _i + pfval2), 0)
46#else
48#define pf(_x, _i)
50#define pf2(_x, _i)
51#endif
52
54#define GIM_COPY_ARRAYS(dest_array, source_array, element_count) \
55 { \
56 for (GUINT _i_ = 0; _i_ < element_count; ++_i_) \
57 { \
58 dest_array[_i_] = source_array[_i_]; \
59 } \
60 }
61
62#define GIM_COPY_ARRAYS_1(dest_array, source_array, element_count, copy_macro) \
63 { \
64 for (GUINT _i_ = 0; _i_ < element_count; ++_i_) \
65 { \
66 copy_macro(dest_array[_i_], source_array[_i_]); \
67 } \
68 }
69
70#define GIM_ZERO_ARRAY(array, element_count) \
71 { \
72 for (GUINT _i_ = 0; _i_ < element_count; ++_i_) \
73 { \
74 array[_i_] = 0; \
75 } \
76 }
77
78#define GIM_CONSTANT_ARRAY(array, element_count, constant) \
79 { \
80 for (GUINT _i_ = 0; _i_ < element_count; ++_i_) \
81 { \
82 array[_i_] = constant; \
83 } \
84 }
85
87 typedef void *gim_alloc_function(size_t size);
88 typedef void *gim_alloca_function(size_t size); //Allocs on the heap
89 typedef void *gim_realloc_function(void *ptr, size_t oldsize, size_t newsize);
90 typedef void gim_free_function(void *ptr);
91
94void gim_set_alloc_handler(gim_alloc_function *fn);
95void gim_set_alloca_handler(gim_alloca_function *fn);
96void gim_set_realloc_handler(gim_realloc_function *fn);
97void gim_set_free_handler(gim_free_function *fn);
98
100 gim_alloc_function *gim_get_alloc_handler(void);
101 gim_alloca_function *gim_get_alloca_handler(void);
102 gim_realloc_function *gim_get_realloc_handler(void);
103 gim_free_function *gim_get_free_handler(void);
104
106void *gim_alloc(size_t size);
107void *gim_alloca(size_t size);
108void *gim_realloc(void *ptr, size_t oldsize, size_t newsize);
109void gim_free(void *ptr);
110
111#if defined(_WIN32) && !defined(__MINGW32__) && !defined(__CYGWIN__)
112#define GIM_SIMD_MEMORY 1
113#endif
114
116#define SIMD_T GUINT64
118#define SIMD_T_SIZE sizeof(SIMD_T)
119
120 inline void gim_simd_memcpy(void *dst, const void *src, size_t copysize)
121{
122#ifdef GIM_SIMD_MEMORY
123 /*
124//'long long int' is incompatible with visual studio 6...
125 //copy words
126 SIMD_T * ui_src_ptr = (SIMD_T *)src;
127 SIMD_T * ui_dst_ptr = (SIMD_T *)dst;
128 while(copysize>=SIMD_T_SIZE)
129 {
130 *(ui_dst_ptr++) = *(ui_src_ptr++);
131 copysize-=SIMD_T_SIZE;
132 }
133 if(copysize==0) return;
134*/
135
136 char *c_src_ptr = (char *)src;
137 char *c_dst_ptr = (char *)dst;
138 while (copysize > 0)
139 {
140 *(c_dst_ptr++) = *(c_src_ptr++);
141 copysize--;
142 }
143 return;
144#else
145 memcpy(dst, src, copysize);
146#endif
147}
148
149template <class T>
150 inline void gim_swap_elements(T *_array, size_t _i, size_t _j)
151{
152 T _e_tmp_ = _array[_i];
153 _array[_i] = _array[_j];
154 _array[_j] = _e_tmp_;
155}
156
157template <class T>
158 inline void gim_swap_elements_memcpy(T *_array, size_t _i, size_t _j)
159{
160 char _e_tmp_[sizeof(T)];
161 gim_simd_memcpy(_e_tmp_, &_array[_i], sizeof(T));
162 gim_simd_memcpy(&_array[_i], &_array[_j], sizeof(T));
163 gim_simd_memcpy(&_array[_j], _e_tmp_, sizeof(T));
164}
165
166template <int SIZE>
167 inline void gim_swap_elements_ptr(char *_array, size_t _i, size_t _j)
168{
169 char _e_tmp_[SIZE];
170 _i *= SIZE;
171 _j *= SIZE;
172 gim_simd_memcpy(_e_tmp_, _array + _i, SIZE);
173 gim_simd_memcpy(_array + _i, _array + _j, SIZE);
174 gim_simd_memcpy(_array + _j, _e_tmp_, SIZE);
175}
176
177#endif // GIM_MEMORY_H_INCLUDED
size
static DBVT_INLINE btScalar size(const btDbvtVolume &a)
Definition btDbvt.cpp:52
gim_math.h
gim_set_free_handler
void gim_set_free_handler(gim_free_function *fn)
Definition gim_memory.cpp:57
gim_alloc
void * gim_alloc(size_t size)
Standar Memory functions.
Definition gim_memory.cpp:82
gim_realloc
void * gim_realloc(void *ptr, size_t oldsize, size_t newsize)
Definition gim_memory.cpp:108
gim_swap_elements_memcpy
void gim_swap_elements_memcpy(T *_array, size_t _i, size_t _j)
Definition gim_memory.h:158
gim_realloc_function
void * gim_realloc_function(void *ptr, size_t oldsize, size_t newsize)
Definition gim_memory.h:89
gim_get_free_handler
gim_free_function * gim_get_free_handler(void)
Definition gim_memory.cpp:77
gim_simd_memcpy
void gim_simd_memcpy(void *dst, const void *src, size_t copysize)
Definition gim_memory.h:120
gim_swap_elements
void gim_swap_elements(T *_array, size_t _i, size_t _j)
Definition gim_memory.h:150
gim_alloca_function
void * gim_alloca_function(size_t size)
Definition gim_memory.h:88
gim_set_alloca_handler
void gim_set_alloca_handler(gim_alloca_function *fn)
Definition gim_memory.cpp:47
gim_get_alloc_handler
gim_alloc_function * gim_get_alloc_handler(void)
get current memory management functions.
Definition gim_memory.cpp:62
gim_free
void gim_free(void *ptr)
Definition gim_memory.cpp:117
gim_get_realloc_handler
gim_realloc_function * gim_get_realloc_handler(void)
Definition gim_memory.cpp:72
gim_set_alloc_handler
void gim_set_alloc_handler(gim_alloc_function *fn)
Memory Function Handlers set new memory management functions.
Definition gim_memory.cpp:42
gim_get_alloca_handler
gim_alloca_function * gim_get_alloca_handler(void)
Definition gim_memory.cpp:67
gim_alloca
void * gim_alloca(size_t size)
Definition gim_memory.cpp:100
gim_alloc_function
void * gim_alloc_function(size_t size)
Function prototypes to allocate and free memory.
Definition gim_memory.h:87
gim_set_realloc_handler
void gim_set_realloc_handler(gim_realloc_function *fn)
Definition gim_memory.cpp:52
gim_swap_elements_ptr
void gim_swap_elements_ptr(char *_array, size_t _i, size_t _j)
Definition gim_memory.h:167
gim_free_function
void gim_free_function(void *ptr)
Definition gim_memory.h:90