use crate::utils::{DefaultRandom, Random, ThreadPool, Timer};
use std::sync::Arc;
pub type InfoLogger = Arc<dyn Fn(&str) + Send + Sync>;
pub trait Quota: Send + Sync {
fn is_reached(&self) -> bool;
}
#[derive(Clone)]
pub struct Environment {
pub random: Arc<dyn Random + Send + Sync>,
pub quota: Option<Arc<dyn Quota + Send + Sync>>,
pub parallelism: Parallelism,
pub logger: InfoLogger,
pub is_experimental: bool,
}
impl Environment {
pub fn new_with_time_quota(max_time: Option<usize>) -> Self {
Self {
quota: max_time.map::<Arc<dyn Quota + Send + Sync>, _>(|time| Arc::new(TimeQuota::new(time as f64))),
..Self::default()
}
}
pub fn new(
random: Arc<dyn Random + Send + Sync>,
quota: Option<Arc<dyn Quota + Send + Sync>>,
parallelism: Parallelism,
logger: InfoLogger,
is_experimental: bool,
) -> Self {
Self { random, quota, parallelism, logger, is_experimental }
}
}
impl Default for Environment {
fn default() -> Self {
Environment::new(
Arc::new(DefaultRandom::default()),
None,
Parallelism::default(),
Arc::new(|msg| println!("{}", msg)),
false,
)
}
}
pub struct TimeQuota {
start: Timer,
limit_in_secs: f64,
}
impl TimeQuota {
pub fn new(limit_in_secs: f64) -> Self {
Self { start: Timer::start(), limit_in_secs }
}
}
impl Quota for TimeQuota {
fn is_reached(&self) -> bool {
self.start.elapsed_secs_as_f64() > self.limit_in_secs
}
}
#[derive(Clone)]
pub struct Parallelism {
available_cpus: usize,
#[allow(clippy::rc_buffer)]
thread_pools: Option<Arc<Vec<ThreadPool>>>,
}
impl Default for Parallelism {
fn default() -> Self {
Self { available_cpus: get_cpus(), thread_pools: None }
}
}
impl Parallelism {
pub fn new(num_thread_pools: usize, threads_per_pool: usize) -> Self {
let thread_pools = (0..num_thread_pools).map(|_| ThreadPool::new(threads_per_pool)).collect();
Self { available_cpus: get_cpus(), thread_pools: Some(Arc::new(thread_pools)) }
}
pub fn available_cpus(&self) -> usize {
self.available_cpus
}
pub fn thread_pool_execute<OP, R>(&self, idx: usize, op: OP) -> R
where
OP: FnOnce() -> R + Send,
R: Send,
{
if let Some(thread_pool) = self.thread_pools.as_ref().and_then(|tps| tps.get(idx)) {
thread_pool.execute(op)
} else {
op()
}
}
pub fn thread_pool_size(&self) -> usize {
self.thread_pools.as_ref().map_or(0, |tp| tp.len())
}
}
#[cfg(not(target_arch = "wasm32"))]
fn get_cpus() -> usize {
num_cpus::get()
}
#[cfg(target_arch = "wasm32")]
fn get_cpus() -> usize {
1
}