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use crate::executor::blocking::Pool;
use crate::loom::thread;
use std::usize;
/// Builds a blocking thread pool with custom configuration values.
pub(crate) struct Builder {
/// Thread name
name: String,
/// Thread stack size
stack_size: Option<usize>,
}
impl Default for Builder {
fn default() -> Self {
Builder {
name: "tokio-blocking-thread".to_string(),
stack_size: None,
}
}
}
impl Builder {
/// Set name of threads spawned by the pool
///
/// If this configuration is not set, then the thread will use the system
/// default naming scheme.
pub(crate) fn name<S: Into<String>>(&mut self, val: S) -> &mut Self {
self.name = val.into();
self
}
/// Set the stack size (in bytes) for worker threads.
///
/// The actual stack size may be greater than this value if the platform
/// specifies minimal stack size.
///
/// The default stack size for spawned threads is 2 MiB, though this
/// particular stack size is subject to change in the future.
pub(crate) fn stack_size(&mut self, val: usize) -> &mut Self {
self.stack_size = Some(val);
self
}
pub(crate) fn build(self) -> Pool {
let mut p = Pool::default();
let Builder { stack_size, name } = self;
p.new_thread = Box::new(move || {
let mut b = thread::Builder::new().name(name.clone());
if let Some(stack_size) = stack_size {
b = b.stack_size(stack_size);
}
b
});
p
}
}
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