115 lines
4.0 KiB
C++
115 lines
4.0 KiB
C++
/*
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* Copyright (c) 2017, Intel Corporation
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*
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* Permission is hereby granted, free of charge, to any person obtaining a
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* copy of this software and associated documentation files (the "Software"),
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* to deal in the Software without restriction, including without limitation
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* the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included
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* in all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
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* OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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* OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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* ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#pragma once
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#include "runtime/helpers/debug_helpers.h"
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#include "runtime/os_interface/debug_settings_manager.h"
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#include "runtime/memory_manager/memory_constants.h"
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#include <new>
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#include <cstdint>
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#include <cstddef>
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#include <algorithm>
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#ifdef _MSC_VER
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#define ALIGNAS(x) __declspec(align(x))
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#else
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#define ALIGNAS(x) alignas(x)
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#endif
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template <typename T>
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constexpr inline T alignUp(T before, size_t alignment) {
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return static_cast<T>((static_cast<size_t>(before) + alignment - 1) & ~(alignment - 1));
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}
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template <typename T>
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constexpr inline T *alignUp(T *ptrBefore, size_t alignment) {
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return reinterpret_cast<T *>(alignUp(reinterpret_cast<uintptr_t>(ptrBefore), alignment));
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}
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template <typename T>
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constexpr inline T alignDown(T before, size_t alignment) {
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return static_cast<T>(static_cast<size_t>(before) & ~(alignment - 1));
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}
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template <typename T>
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constexpr inline T *alignDown(T *ptrBefore, size_t alignment) {
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return reinterpret_cast<T *>(alignDown(reinterpret_cast<uintptr_t>(ptrBefore), alignment));
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}
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inline void *alignedMalloc(size_t bytes, size_t alignment) {
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DEBUG_BREAK_IF(alignment <= 0);
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if (bytes == 0) {
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bytes = sizeof(void *);
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}
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// Make sure our alignment is at least the size of a pointer
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alignment = std::max(alignment, sizeof(void *));
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// Allocate _bytes + _alignment
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size_t sizeToAlloc = bytes + alignment;
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auto pOriginalMemory = new (std::nothrow) char[sizeToAlloc];
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// Add in the alignment
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auto pAlignedMemory = reinterpret_cast<uintptr_t>(pOriginalMemory);
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if (pAlignedMemory) {
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pAlignedMemory += alignment;
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pAlignedMemory -= pAlignedMemory % alignment;
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// Store the original pointer to facilitate deallocation
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reinterpret_cast<void **>(pAlignedMemory)[-1] = pOriginalMemory;
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}
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DBG_LOG(LogAlignedAllocations, __FUNCTION__, "Pointer:", reinterpret_cast<void *>(pOriginalMemory), "size:", sizeToAlloc);
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// Return result
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return reinterpret_cast<void *>(pAlignedMemory);
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}
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inline void alignedFree(void *ptr) {
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if (ptr) {
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auto originalPtr = reinterpret_cast<char **>(ptr)[-1];
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DBG_LOG(LogAlignedAllocations, __FUNCTION__, "Pointer:", reinterpret_cast<void *>(originalPtr));
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delete[] originalPtr;
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}
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}
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inline size_t alignSizeWholePage(const void *ptr, size_t size) {
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uintptr_t startPageMisalignedAddressOffset = reinterpret_cast<uintptr_t>(ptr) & MemoryConstants::pageMask;
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size_t alignedSizeToPage = alignUp(startPageMisalignedAddressOffset + size, MemoryConstants::pageSize);
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return alignedSizeToPage;
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}
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template <size_t alignment, typename T>
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inline constexpr bool isAligned(T val) {
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return (static_cast<size_t>(val) % alignment) == 0;
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}
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template <size_t alignment, typename T>
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inline bool isAligned(T *ptr) {
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return ((reinterpret_cast<uintptr_t>(ptr)) % alignment) == 0;
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}
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template <typename T>
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inline bool isAligned(T *ptr) {
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return (reinterpret_cast<uintptr_t>(ptr) & (alignof(T) - 1)) == 0;
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}
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