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//! # 🐏 rpmalloc //! //! [![Build Status](https://github.com/EmbarkStudios/rpmalloc-rs/workflows/CI/badge.svg)](https://github.com/EmbarkStudios/rpmalloc-rs/actions?workflow=CI) //! [![Crates.io](https://img.shields.io/crates/v/rpmalloc.svg)](https://crates.io/crates/rpmalloc) //! [![Docs](https://docs.rs/rpmalloc/badge.svg)](https://docs.rs/rpmalloc) //! [![Contributor Covenant](https://img.shields.io/badge/contributor%20covenant-v1.4%20adopted-ff69b4.svg)](CODE_OF_CONDUCT.md) //! [![Embark](https://img.shields.io/badge/embark-open%20source-blueviolet.svg)](http://embark.dev) //! //! Cross-platform Rust global memory allocator using [rpmalloc](https://github.com/rampantpixels/rpmalloc). //! //! See the [rpmalloc README](https://github.com/mjansson/rpmalloc/blob/master/README.md) for a detailed description of how the allocator works, peforms, and compares with other allocators. //! //! ## How to use //! //! To use rpmalloc as the global allocator in your Rust binary crate, in `Cargo.toml` add: //! //! ```toml //! [dependencies] //! rpmalloc = "0.1.0" //! ``` //! //! And then in one of your `.rs` files: //! //! ```rust //! #[global_allocator] //! static ALLOC: rpmalloc::RpMalloc = rpmalloc::RpMalloc; //! ``` //! //! ### Configuration //! //! It is also possible to configure how the allocator should be built through a set of feature flags that correspond to the rpmalloc C library `ENABLE_x` defines: //! //! - Overall: `statistics`, `validate_args`, `asserts`, `guards` //! - Cache: `unlimited_cache`, `unlimited_global_cache`, `unlimited_thread_cache`, `global_cache`, `thread_cache`, `adaptive_thread_cache` //! //! Example usage: //! //! ```toml //! [dependencies] //! rpmalloc = { version = "0.1.0", features = ["guards", "statistics"] } //! ``` //! //! See [rpmalloc README](https://github.com/mjansson/rpmalloc/blob/master/README.md) for detailed descriptions of the config options. //! //! Note that all of these have not been tested together with this Rust crate. //! //! ## Support //! //! This crate has been tested to support the following platforms and Rust targets: //! //! - `x86_64-pc-windows-msvc` //! - `x86_64-apple-darwin` //! - `x86_64-unknown-linux-gnu` //! //! PRs to increase the amount of supported targets are welcome, but they should add CI verification and avoid adding additional dependencies. //! //! ## Contributing //! //! We welcome community contributions to this project. //! //! Please read our [Contributor Guide](CONTRIBUTING.md) for more information on how to get started. //! //! ## License //! //! Licensed under either of //! //! * Apache License, Version 2.0, ([LICENSE-APACHE](LICENSE-APACHE) or http://www.apache.org/licenses/LICENSE-2.0) //! * MIT license ([LICENSE-MIT](LICENSE-MIT) or http://opensource.org/licenses/MIT) //! //! at your option. //! //! Note that the [rpmalloc](https://github.com/rampantpixels/rpmalloc) library this crate uses is under public domain, and can also be licensed under MIT. //! //! ### Contribution //! //! Unless you explicitly state otherwise, any contribution intentionally submitted for inclusion in the work by you, as defined in the Apache-2.0 license, shall be dual licensed as above, without any additional terms or conditions. use rpmalloc_sys as ffi; use std::alloc::{GlobalAlloc, Layout}; use std::mem::MaybeUninit; /// rpmalloc global allocator wrapper pub struct RpMalloc; unsafe impl GlobalAlloc for RpMalloc { unsafe fn alloc(&self, layout: Layout) -> *mut u8 { ffi::rpaligned_alloc(layout.align(), layout.size()) as *mut u8 } unsafe fn dealloc(&self, ptr: *mut u8, _layout: Layout) { ffi::rpfree(ptr as *mut ffi::c_void) } } impl RpMalloc { /// Retrieve global allocation stats. /// /// Some of the fields in these will only be used if the `statistics` feature is enabled pub fn global_stats() -> ffi::rpmalloc_global_statistics_t { let mut stats: MaybeUninit<ffi::rpmalloc_global_statistics_t> = MaybeUninit::uninit(); unsafe { ffi::rpmalloc_global_statistics(stats.as_mut_ptr()); stats.assume_init() } } /// Retrieve allocation stats for the current thread. /// /// Some of the fields in these will only be used if the `statistics` feature is enabled pub fn thread_stats() -> ffi::rpmalloc_thread_statistics_t { let mut stats: MaybeUninit<ffi::rpmalloc_thread_statistics_t> = MaybeUninit::uninit(); unsafe { ffi::rpmalloc_thread_statistics(stats.as_mut_ptr()); stats.assume_init() } } }