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/*
* Copyright 2011-2015 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_GUARDED_ALLOCATOR_H__
#define __UTIL_GUARDED_ALLOCATOR_H__
#include <cstddef>
#include <memory>
#include "util_debug.h"
#include "util_types.h"
#ifdef WITH_BLENDER_GUARDEDALLOC
# include "../../guardedalloc/MEM_guardedalloc.h"
#endif
CCL_NAMESPACE_BEGIN
/* Internal use only. */
void util_guarded_mem_alloc(size_t n);
void util_guarded_mem_free(size_t n);
/* Guarded allocator for the use with STL. */
template <typename T>
class GuardedAllocator {
public:
typedef size_t size_type;
typedef ptrdiff_t difference_type;
typedef T *pointer;
typedef const T *const_pointer;
typedef T& reference;
typedef const T& const_reference;
typedef T value_type;
GuardedAllocator() {}
GuardedAllocator(const GuardedAllocator&) {}
T *allocate(size_t n, const void *hint = 0)
{
util_guarded_mem_alloc(n * sizeof(T));
(void)hint;
#ifdef WITH_BLENDER_GUARDEDALLOC
if(n == 0) {
return NULL;
}
return (T*)MEM_mallocN(n * sizeof(T), "Cycles Alloc");
#else
return (T*)malloc(n * sizeof(T));
#endif
}
void deallocate(T *p, size_t n)
{
util_guarded_mem_free(n * sizeof(T));
if(p != NULL) {
#ifdef WITH_BLENDER_GUARDEDALLOC
MEM_freeN(p);
#else
free(p);
#endif
}
}
T *address(T& x) const
{
return &x;
}
const T *address(const T& x) const
{
return &x;
}
GuardedAllocator<T>& operator=(const GuardedAllocator&)
{
return *this;
}
void construct(T *p, const T& val)
{
new ((T *)p) T(val);
}
void destroy(T *p)
{
p->~T();
}
size_t max_size() const
{
return size_t(-1);
}
template <class U>
struct rebind {
typedef GuardedAllocator<U> other;
};
template <class U>
GuardedAllocator(const GuardedAllocator<U>&) {}
template <class U>
GuardedAllocator& operator=(const GuardedAllocator<U>&) { return *this; }
};
/* Get memory usage and peak from the guarded STL allocator. */
size_t util_guarded_get_mem_used(void);
size_t util_guarded_get_mem_peak(void);
CCL_NAMESPACE_END
#endif /* __UTIL_GUARDED_ALLOCATOR_H__ */
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