springql-core 0.18.1

SpringQL: Open-source stream processor for IoT devices and in-vehicle computers
Documentation 
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// This file is part of https://github.com/SpringQL/SpringQL which is licensed under MIT OR Apache-2.0. See file LICENSE-MIT or LICENSE-APACHE for full license details.

/// This trait requires estimation on how much heap memory [bytes] used by impl queue.
///
/// Rust does not provide standard way to calculate heap memory size (Box, Vec, for example).
/// Since Memory State Machine uses total memory size of queues, we need to impl this trait by ourselves.
pub trait MemSize {
    fn mem_size(&self) -> usize;
}

const RAW_POINTER_SIZE: usize = 8;

/// Note: assuming many objects share the same Arc so interior object size is negligible.
#[inline]
pub fn arc_overhead_size() -> usize {
    RAW_POINTER_SIZE
}

#[inline]
pub fn chrono_naive_date_time_overhead_size() -> usize {
    4 * 3
}