forked from bartvdbraak/blender
166 lines
3.2 KiB
C++
166 lines
3.2 KiB
C++
/*
|
|
* Copyright 2011-2013 Blender Foundation
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* http://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License
|
|
*/
|
|
|
|
#ifndef __UTIL_VECTOR_H__
|
|
#define __UTIL_VECTOR_H__
|
|
|
|
/* Vector */
|
|
|
|
#include <string.h>
|
|
#include <vector>
|
|
|
|
#include "util_types.h"
|
|
|
|
CCL_NAMESPACE_BEGIN
|
|
|
|
using std::vector;
|
|
|
|
static inline void *malloc_aligned(size_t size, size_t alignment)
|
|
{
|
|
void *data = (void*)malloc(size + sizeof(void*) + alignment - 1);
|
|
|
|
union { void *ptr; size_t offset; } u;
|
|
u.ptr = (char*)data + sizeof(void*);
|
|
u.offset = (u.offset + alignment - 1) & ~(alignment - 1);
|
|
*(((void**)u.ptr) - 1) = data;
|
|
|
|
return u.ptr;
|
|
}
|
|
|
|
static inline void free_aligned(void *ptr)
|
|
{
|
|
if(ptr) {
|
|
void *data = *(((void**)ptr) - 1);
|
|
free(data);
|
|
}
|
|
}
|
|
|
|
/* Array
|
|
*
|
|
* Simplified version of vector, serving multiple purposes:
|
|
* - somewhat faster in that it does not clear memory on resize/alloc,
|
|
* this was actually showing up in profiles quite significantly. it
|
|
* also does not run any constructors/destructors
|
|
* - if this is used, we are not tempted to use inefficient operations
|
|
* - aligned allocation for SSE data types */
|
|
|
|
template<typename T, size_t alignment = 16>
|
|
class array
|
|
{
|
|
public:
|
|
array()
|
|
{
|
|
data = NULL;
|
|
datasize = 0;
|
|
}
|
|
|
|
array(size_t newsize)
|
|
{
|
|
if(newsize == 0) {
|
|
data = NULL;
|
|
datasize = 0;
|
|
}
|
|
else {
|
|
data = (T*)malloc_aligned(sizeof(T)*newsize, alignment);
|
|
datasize = newsize;
|
|
}
|
|
}
|
|
|
|
array(const array& from)
|
|
{
|
|
*this = from;
|
|
}
|
|
|
|
array& operator=(const array& from)
|
|
{
|
|
if(from.datasize == 0) {
|
|
data = NULL;
|
|
datasize = 0;
|
|
}
|
|
else {
|
|
data = (T*)malloc_aligned(sizeof(T)*from.datasize, alignment);
|
|
memcpy(data, from.data, from.datasize*sizeof(T));
|
|
datasize = from.datasize;
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
array& operator=(const vector<T>& from)
|
|
{
|
|
datasize = from.size();
|
|
data = NULL;
|
|
|
|
if(datasize > 0) {
|
|
data = (T*)malloc_aligned(sizeof(T)*datasize, alignment);
|
|
memcpy(data, &from[0], datasize*sizeof(T));
|
|
free_aligned(data);
|
|
data = (T*)malloc_aligned(sizeof(T)*datasize, alignment);
|
|
memcpy(data, &from[0], datasize*sizeof(T));
|
|
}
|
|
|
|
return *this;
|
|
}
|
|
|
|
~array()
|
|
{
|
|
free_aligned(data);
|
|
}
|
|
|
|
void resize(size_t newsize)
|
|
{
|
|
if(newsize == 0) {
|
|
clear();
|
|
}
|
|
else if(newsize != datasize) {
|
|
T *newdata = (T*)malloc_aligned(sizeof(T)*newsize, alignment);
|
|
if(data) {
|
|
memcpy(newdata, data, ((datasize < newsize)? datasize: newsize)*sizeof(T));
|
|
free_aligned(data);
|
|
}
|
|
|
|
data = newdata;
|
|
datasize = newsize;
|
|
}
|
|
}
|
|
|
|
void clear()
|
|
{
|
|
free_aligned(data);
|
|
data = NULL;
|
|
datasize = 0;
|
|
}
|
|
|
|
size_t size() const
|
|
{
|
|
return datasize;
|
|
}
|
|
|
|
T& operator[](size_t i) const
|
|
{
|
|
return data[i];
|
|
}
|
|
|
|
protected:
|
|
T *data;
|
|
size_t datasize;
|
|
};
|
|
|
|
CCL_NAMESPACE_END
|
|
|
|
#endif /* __UTIL_VECTOR_H__ */
|
|
|