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// Copyright 2020,2021 Shin Yoshida // // This is part of rust-mmap-allocator // // "LGPL-3.0-or-later OR Apache-2.0" // // rust-mmap-allocator is free software: you can redistribute it and/or modify // it under the terms of the GNU General Public License as published by // the Free Software Foundation, either version 3 of the License, or // (at your option) any later version. // // rust-mmap-allocator is distributed in the hope that it will be useful, // but WITHOUT ANY WARRANTY; without even the implied warranty of // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the // GNU General Public License for more details. // // You should have received a copy of the GNU General Public License // along with rust-mmap-allocator. If not, see <http://www.gnu.org/licenses/>. // // Licensed under the Apache License, Version 2.0 (the "License"); // you may not use this file except in compliance with the License. // You may obtain a copy of the License at // // http://www.apache.org/licenses/LICENSE-2.0 // // Unless required by applicable law or agreed to in writing, software // 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. //! `mmap-allocator` declares struct `MmapAllocator` and function 'page\_size' for 'unix' or 'linux' platform. //! //! `MmapAllocator` implements `std::alloc::GlobalAlloc` whose backend is 'posix mmap'. //! //! 'page\_size' returns OS page size. //! ('unix' and 'linux' os pass memory to a process by multipile of page size; if a process //! requires 32 bytes heap memory and if the OS page size is 4096 bytes, OS passes 4096 bytes //! memory chunk. Usually 'malloc' deals it to use memory effectively.) #[cfg(unix)] mod mmap_allocator; #[cfg(unix)] pub use crate::mmap_allocator::{page_size, MmapAllocator};