52 lines
1.6 KiB
Rust
52 lines
1.6 KiB
Rust
// Copyright 2015-2019 Parity Technologies (UK) Ltd.
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// This file is part of Parity.
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// Parity 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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// Parity 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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// You should have received a copy of the GNU General Public License
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// along with Parity. If not, see <http://www.gnu.org/licenses/>.
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//! Estimation for heapsize calculation. Usable to replace call to allocator method (for some
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//! allocators or simply because we just need a deterministic cunsumption measurement).
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use crate::malloc_size::{
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MallocSizeOf,
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MallocShallowSizeOf,
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MallocUnconditionalShallowSizeOf,
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MallocSizeOfOps
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};
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use std::mem::{size_of, size_of_val};
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impl<T: ?Sized> MallocShallowSizeOf for Box<T> {
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fn shallow_size_of(&self, _ops: &mut MallocSizeOfOps) -> usize {
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size_of_val(&**self)
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}
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}
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impl MallocSizeOf for String {
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fn size_of(&self, _ops: &mut MallocSizeOfOps) -> usize {
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self.capacity() * size_of::<u8>()
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}
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}
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impl<T> MallocShallowSizeOf for Vec<T> {
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fn shallow_size_of(&self, _ops: &mut MallocSizeOfOps) -> usize {
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self.capacity() * size_of::<T>()
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}
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}
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impl<T> MallocUnconditionalShallowSizeOf for std::sync::Arc<T> {
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fn unconditional_shallow_size_of(&self, _ops: &mut MallocSizeOfOps) -> usize {
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size_of::<T>()
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}
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}
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