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-/************************************************************************************
-
-PublicHeader: OVR_Kernel.h
-Filename : OVR_ContainerAllocator.h
-Content : Template allocators and constructors for containers.
-Created : September 19, 2012
-Notes :
-
-Copyright : Copyright 2014 Oculus VR, LLC All Rights reserved.
-
-Licensed under the Oculus VR Rift SDK License Version 3.2 (the "License");
-you may not use the Oculus VR Rift SDK except in compliance with the License,
-which is provided at the time of installation or download, or which
-otherwise accompanies this software in either electronic or hard copy form.
-
-You may obtain a copy of the License at
-
-http://www.oculusvr.com/licenses/LICENSE-3.2
-
-Unless required by applicable law or agreed to in writing, the Oculus VR SDK
-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 OVR_ContainerAllocator_h
-#define OVR_ContainerAllocator_h
-
-#include "OVR_Allocator.h"
-#include <string.h>
-
-
-namespace OVR {
-
-
-//-----------------------------------------------------------------------------------
-// ***** Container Allocator
-
-// ContainerAllocator serves as a template argument for allocations done by
-// containers, such as Array and Hash; replacing it could allow allocator
-// substitution in containers.
-
-class ContainerAllocatorBase
-{
-public:
- static void* Alloc(size_t size) { return OVR_ALLOC(size); }
- static void* Realloc(void* p, size_t newSize) { return OVR_REALLOC(p, newSize); }
- static void Free(void *p) { OVR_FREE(p); }
-};
-
-
-
-//-----------------------------------------------------------------------------------
-// ***** Constructors, Destructors, Copiers
-
-// Plain Old Data - movable, no special constructors/destructor.
-template<class T>
-class ConstructorPOD
-{
-public:
- static void Construct(void *) {}
- static void Construct(void *p, const T& source)
- {
- *(T*)p = source;
- }
-
- // Same as above, but allows for a different type of constructor.
- template <class S>
- static void ConstructAlt(void *p, const S& source)
- {
- *(T*)p = source;
- }
-
- static void ConstructArray(void*, size_t) {}
-
- static void ConstructArray(void* p, size_t count, const T& source)
- {
- uint8_t *pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- *(T*)pdata = source;
- }
-
- static void ConstructArray(void* p, size_t count, const T* psource)
- {
- memcpy(p, psource, sizeof(T) * count);
- }
-
- static void Destruct(T*) {}
- static void DestructArray(T*, size_t) {}
-
- static void CopyArrayForward(T* dst, const T* src, size_t count)
- {
- memmove(dst, src, count * sizeof(T));
- }
-
- static void CopyArrayBackward(T* dst, const T* src, size_t count)
- {
- memmove(dst, src, count * sizeof(T));
- }
-
- static bool IsMovable() { return true; }
-};
-
-
-//-----------------------------------------------------------------------------------
-// ***** ConstructorMov
-//
-// Correct C++ construction and destruction for movable objects
-template<class T>
-class ConstructorMov
-{
-public:
- static void Construct(void* p)
- {
- OVR::Construct<T>(p);
- }
-
- static void Construct(void* p, const T& source)
- {
- OVR::Construct<T>(p, source);
- }
-
- // Same as above, but allows for a different type of constructor.
- template <class S>
- static void ConstructAlt(void* p, const S& source)
- {
- OVR::ConstructAlt<T,S>(p, source);
- }
-
- static void ConstructArray(void* p, size_t count)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata);
- }
-
- static void ConstructArray(void* p, size_t count, const T& source)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata, source);
- }
-
- static void ConstructArray(void* p, size_t count, const T* psource)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata, *psource++);
- }
-
- static void Destruct(T* p)
- {
- p->~T();
- OVR_UNUSED(p); // Suppress silly MSVC warning
- }
-
- static void DestructArray(T* p, size_t count)
- {
- p += count - 1;
- for (size_t i=0; i<count; ++i, --p)
- p->~T();
- }
-
- static void CopyArrayForward(T* dst, const T* src, size_t count)
- {
- memmove(dst, src, count * sizeof(T));
- }
-
- static void CopyArrayBackward(T* dst, const T* src, size_t count)
- {
- memmove(dst, src, count * sizeof(T));
- }
-
- static bool IsMovable() { return true; }
-};
-
-
-//-----------------------------------------------------------------------------------
-// ***** ConstructorCPP
-//
-// Correct C++ construction and destruction for movable objects
-template<class T>
-class ConstructorCPP
-{
-public:
- static void Construct(void* p)
- {
- OVR::Construct<T>(p);
- }
-
- static void Construct(void* p, const T& source)
- {
- OVR::Construct<T>(p, source);
- }
-
- // Same as above, but allows for a different type of constructor.
- template <class S>
- static void ConstructAlt(void* p, const S& source)
- {
- OVR::ConstructAlt<T,S>(p, source);
- }
-
- static void ConstructArray(void* p, size_t count)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata);
- }
-
- static void ConstructArray(void* p, size_t count, const T& source)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata, source);
- }
-
- static void ConstructArray(void* p, size_t count, const T* psource)
- {
- uint8_t* pdata = (uint8_t*)p;
- for (size_t i=0; i< count; ++i, pdata += sizeof(T))
- Construct(pdata, *psource++);
- }
-
- static void Destruct(T* p)
- {
- p->~T();
- OVR_UNUSED(p); // Suppress silly MSVC warning
- }
-
- static void DestructArray(T* p, size_t count)
- {
- p += count - 1;
- for (size_t i=0; i<count; ++i, --p)
- p->~T();
- }
-
- static void CopyArrayForward(T* dst, const T* src, size_t count)
- {
- for(size_t i = 0; i < count; ++i)
- dst[i] = src[i];
- }
-
- static void CopyArrayBackward(T* dst, const T* src, size_t count)
- {
- for(size_t i = count; i; --i)
- dst[i-1] = src[i-1];
- }
-
- static bool IsMovable() { return false; }
-};
-
-
-//-----------------------------------------------------------------------------------
-// ***** Container Allocator with movement policy
-//
-// Simple wraps as specialized allocators
-template<class T> struct ContainerAllocator_POD : ContainerAllocatorBase, ConstructorPOD<T> {};
-template<class T> struct ContainerAllocator : ContainerAllocatorBase, ConstructorMov<T> {};
-template<class T> struct ContainerAllocator_CPP : ContainerAllocatorBase, ConstructorCPP<T> {};
-
-
-} // OVR
-
-
-#endif
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