165 lines
4.2 KiB
C++
165 lines
4.2 KiB
C++
// Copyright 2009-2021 Intel Corporation
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// SPDX-License-Identifier: Apache-2.0
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#pragma once
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#include "platform.h"
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#include <vector>
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#include <set>
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namespace embree
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{
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#define ALIGNED_STRUCT_(align) \
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void* operator new(size_t size) { return alignedMalloc(size,align); } \
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void operator delete(void* ptr) { alignedFree(ptr); } \
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void* operator new[](size_t size) { return alignedMalloc(size,align); } \
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void operator delete[](void* ptr) { alignedFree(ptr); }
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#define ALIGNED_CLASS_(align) \
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public: \
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ALIGNED_STRUCT_(align) \
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private:
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/*! aligned allocation */
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void* alignedMalloc(size_t size, size_t align);
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void alignedFree(void* ptr);
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/*! allocator that performs aligned allocations */
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template<typename T, size_t alignment>
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struct aligned_allocator
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{
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typedef T value_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 std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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__forceinline pointer allocate( size_type n ) {
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return (pointer) alignedMalloc(n*sizeof(value_type),alignment);
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}
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__forceinline void deallocate( pointer p, size_type n ) {
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return alignedFree(p);
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}
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__forceinline void construct( pointer p, const_reference val ) {
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new (p) T(val);
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}
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__forceinline void destroy( pointer p ) {
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p->~T();
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}
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};
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/*! allocates pages directly from OS */
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bool win_enable_selockmemoryprivilege(bool verbose);
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bool os_init(bool hugepages, bool verbose);
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void* os_malloc (size_t bytes, bool& hugepages);
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size_t os_shrink (void* ptr, size_t bytesNew, size_t bytesOld, bool hugepages);
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void os_free (void* ptr, size_t bytes, bool hugepages);
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void os_advise (void* ptr, size_t bytes);
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/*! allocator that performs OS allocations */
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template<typename T>
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struct os_allocator
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{
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typedef T value_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 std::size_t size_type;
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typedef std::ptrdiff_t difference_type;
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__forceinline os_allocator ()
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: hugepages(false) {}
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__forceinline pointer allocate( size_type n ) {
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return (pointer) os_malloc(n*sizeof(value_type),hugepages);
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}
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__forceinline void deallocate( pointer p, size_type n ) {
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return os_free(p,n*sizeof(value_type),hugepages);
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}
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__forceinline void construct( pointer p, const_reference val ) {
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new (p) T(val);
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}
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__forceinline void destroy( pointer p ) {
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p->~T();
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}
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bool hugepages;
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};
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/*! allocator for IDs */
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template<typename T, size_t max_id>
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struct IDPool
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{
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typedef T value_type;
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IDPool ()
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: nextID(0) {}
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T allocate()
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{
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/* return ID from list */
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if (!IDs.empty())
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{
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T id = *IDs.begin();
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IDs.erase(IDs.begin());
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return id;
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}
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/* allocate new ID */
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else
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{
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if (size_t(nextID)+1 > max_id)
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return -1;
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return nextID++;
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}
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}
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/* adds an ID provided by the user */
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bool add(T id)
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{
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if (id > max_id)
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return false;
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/* check if ID should be in IDs set */
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if (id < nextID) {
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auto p = IDs.find(id);
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if (p == IDs.end()) return false;
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IDs.erase(p);
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return true;
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}
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/* otherwise increase ID set */
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else
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{
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for (T i=nextID; i<id; i++) {
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IDs.insert(i);
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}
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nextID = id+1;
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return true;
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}
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}
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void deallocate( T id )
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{
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assert(id < nextID);
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MAYBE_UNUSED auto done = IDs.insert(id).second;
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assert(done);
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}
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private:
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std::set<T> IDs; //!< stores deallocated IDs to be reused
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T nextID; //!< next ID to use when IDs vector is empty
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};
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}
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