84 lines
2.1 KiB
C++
84 lines
2.1 KiB
C++
#pragma once
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/*
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* Copyright (C) 2024 Brett Terpstra
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <https://www.gnu.org/licenses/>.
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*/
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#ifndef BLT_MMAP_H
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#define BLT_MMAP_H
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#include <blt/std/logging.h>
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#include <blt/std/types.h>
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#include <cstdlib>
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#ifdef __unix__
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#include <sys/mman.h>
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#endif
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// size of 2mb in bytes
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inline constexpr blt::size_t BLT_2MB_SIZE = 4096 * 512;
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namespace blt
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{
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/**
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* Logging function used for handling mmap errors. call after a failed mmap call.
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*/
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void handle_mmap_error(blt::logging::logger func);
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inline static constexpr blt::size_t align_size_to(blt::size_t size, blt::size_t align)
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{
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const blt::size_t MASK = ~(align - 1);
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return (size & MASK) + align;
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}
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void* allocate_2mb_huge_pages(blt::size_t bytes);
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void mmap_free(void* ptr, blt::size_t bytes);
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class mmap_huge_allocator
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{
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public:
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void* allocate(blt::size_t bytes) // NOLINT
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{
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return allocate_2mb_huge_pages(bytes);
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}
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void deallocate(void* ptr, blt::size_t bytes) // NOLINT
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{
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mmap_free(ptr, bytes);
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}
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};
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class aligned_huge_allocator
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{
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public:
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void* allocate(blt::size_t bytes) // NOLINT
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{
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return std::aligned_alloc(BLT_2MB_SIZE, bytes);
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}
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void deallocate(void* ptr, blt::size_t) // NOLINT
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{
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std::free(ptr);
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}
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};
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}
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#endif //BLT_MMAP_H
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