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lib.rs
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lib.rs
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// Copyright 2020 Parity Technologies
//
// Licensed under the Apache License, Version 2.0 <LICENSE-APACHE or
// http://www.apache.org/licenses/LICENSE-2.0> or the MIT license
// <LICENSE-MIT or http://opensource.org/licenses/MIT>, at your
// option. This file may not be copied, modified, or distributed
// except according to those terms.
//! Crate for parity memory management related utilities.
//! It includes global allocator choice, heap measurement and
//! memory erasure.
#![cfg_attr(not(feature = "std"), no_std)]
#[cfg(not(feature = "std"))]
extern crate alloc;
cfg_if::cfg_if! {
if #[cfg(all(
feature = "jemalloc-global",
not(target_os = "windows"),
not(target_arch = "wasm32")
))] {
/// Global allocator
#[global_allocator]
pub static ALLOC: jemallocator::Jemalloc = jemallocator::Jemalloc;
} else if #[cfg(feature = "dlmalloc-global")] {
/// Global allocator
#[global_allocator]
pub static ALLOC: dlmalloc::GlobalDlmalloc = dlmalloc::GlobalDlmalloc;
} else if #[cfg(feature = "weealloc-global")] {
/// Global allocator
#[global_allocator]
pub static ALLOC: wee_alloc::WeeAlloc = wee_alloc::WeeAlloc::INIT;
} else if #[cfg(all(
feature = "mimalloc-global",
not(target_arch = "wasm32")
))] {
/// Global allocator
#[global_allocator]
pub static ALLOC: mimalloc::MiMalloc = mimalloc::MiMalloc;
} else {
// default allocator used
}
}
pub mod allocators;
#[cfg(any(all(target_os = "macos", not(feature = "jemalloc-global"),), all(target_os = "ios", not(feature = "jemalloc-global"),), feature = "estimate-heapsize"))]
pub mod sizeof;
/// This is a copy of patched crate `malloc_size_of` as a module.
/// We need to have it as an inner module to be able to define our own traits implementation,
/// if at some point the trait become standard enough we could use the right way of doing it
/// by implementing it in our type traits crates. At this time moving this trait to the primitive
/// types level would impact too much of the dependencies to be easily manageable.
#[macro_use]
mod malloc_size;
#[cfg(feature = "ethereum-impls")]
pub mod ethereum_impls;
#[cfg(feature = "primitive-types")]
pub mod primitives_impls;
pub use allocators::MallocSizeOfExt;
pub use malloc_size::{MallocShallowSizeOf, MallocSizeOf, MallocSizeOfOps};
pub use parity_util_mem_derive::*;
/// Heap size of structure.
///
/// Structure can be anything that implements MallocSizeOf.
pub fn malloc_size<T: MallocSizeOf + ?Sized>(t: &T) -> usize {
MallocSizeOf::size_of(t, &mut allocators::new_malloc_size_ops())
}
#[cfg(feature = "std")]
#[cfg(test)]
mod test {
use super::{malloc_size, MallocSizeOf, MallocSizeOfExt};
use std::sync::Arc;
#[test]
fn test_arc() {
let val = Arc::new("test".to_string());
let s = val.malloc_size_of();
assert!(s > 0);
}
#[test]
fn test_dyn() {
trait Augmented: MallocSizeOf {}
impl Augmented for Vec<u8> {}
let val: Arc<dyn Augmented> = Arc::new(vec![0u8; 1024]);
assert!(malloc_size(&*val) > 1000);
}
}