135 lines
3.0 KiB
C++
135 lines
3.0 KiB
C++
/*
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* Copyright 2011-2015 Blender Foundation
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef __UTIL_GUARDED_ALLOCATOR_H__
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#define __UTIL_GUARDED_ALLOCATOR_H__
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#include <cstddef>
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#include <memory>
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#include "util_debug.h"
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#include "util_types.h"
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#ifdef WITH_BLENDER_GUARDEDALLOC
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# include "../../guardedalloc/MEM_guardedalloc.h"
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#endif
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CCL_NAMESPACE_BEGIN
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/* Internal use only. */
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void util_guarded_mem_alloc(size_t n);
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void util_guarded_mem_free(size_t n);
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/* Guarded allocator for the use with STL. */
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template <typename T>
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class GuardedAllocator {
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public:
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typedef size_t size_type;
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typedef ptrdiff_t difference_type;
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typedef T *pointer;
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typedef const T *const_pointer;
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typedef T& reference;
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typedef const T& const_reference;
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typedef T value_type;
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GuardedAllocator() {}
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GuardedAllocator(const GuardedAllocator&) {}
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T *allocate(size_t n, const void *hint = 0)
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{
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size_t size = n * sizeof(T);
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util_guarded_mem_alloc(size);
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(void)hint;
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#ifdef WITH_BLENDER_GUARDEDALLOC
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if(n == 0) {
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return NULL;
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}
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/* C++ standard requires allocation functions to allocate memory suitably
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* aligned for any standard type. This is 16 bytes for 64 bit platform as
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* far as i concerned. We might over-align on 32bit here, but that should
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* be all safe actually.
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*/
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return (T*)MEM_mallocN_aligned(size, 16, "Cycles Alloc");
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#else
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return (T*)malloc(size);
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#endif
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}
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void deallocate(T *p, size_t n)
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{
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util_guarded_mem_free(n * sizeof(T));
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if(p != NULL) {
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#ifdef WITH_BLENDER_GUARDEDALLOC
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MEM_freeN(p);
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#else
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free(p);
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#endif
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}
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}
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T *address(T& x) const
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{
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return &x;
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}
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const T *address(const T& x) const
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{
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return &x;
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}
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GuardedAllocator<T>& operator=(const GuardedAllocator&)
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{
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return *this;
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}
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void construct(T *p, const T& val)
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{
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new ((T *)p) T(val);
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}
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void destroy(T *p)
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{
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p->~T();
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}
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size_t max_size() const
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{
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return size_t(-1);
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}
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template <class U>
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struct rebind {
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typedef GuardedAllocator<U> other;
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};
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template <class U>
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GuardedAllocator(const GuardedAllocator<U>&) {}
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template <class U>
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GuardedAllocator& operator=(const GuardedAllocator<U>&) { return *this; }
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inline bool operator==(GuardedAllocator const& /*other*/) { return true; }
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inline bool operator!=(GuardedAllocator const& other) { return !operator==(other); }
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};
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/* Get memory usage and peak from the guarded STL allocator. */
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size_t util_guarded_get_mem_used(void);
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size_t util_guarded_get_mem_peak(void);
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CCL_NAMESPACE_END
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#endif /* __UTIL_GUARDED_ALLOCATOR_H__ */
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