Struct Builder

pub struct Builder { /* private fields */ }

Thread pool configuration object

Builder starts with a number of workers equal to the number of CPUs on the host. But you can change it until you call create().

Implementations

impl Builder

pub fn new() -> Builder

Create a builder a number of workers equal to the number of CPUs on the host.

pub fn pool_size(&mut self, size: usize) -> &mut Self

Set size of a future CpuPool

The size of a thread pool is the number of worker threads spawned

pub fn stack_size(&mut self, stack_size: usize) -> &mut Self

Set stack size of threads in the pool.

pub fn name_prefix<S: Into<String>>(&mut self, name_prefix: S) -> &mut Self

Set thread name prefix of a future CpuPool

Thread name prefix is used for generating thread names. For example, if prefix is my-pool-, then threads in the pool will get names like my-pool-1 etc.

pub fn after_start<F>(&mut self, f: F) -> &mut Self

where F: Fn() + Send + Sync + 'static,

Execute function f right after each thread is started but before running any jobs on it.

This is initially intended for bookkeeping and monitoring uses. The f will be deconstructed after the builder is deconstructed and all threads in the pool has executed it.

pub fn before_stop<F>(&mut self, f: F) -> &mut Self

where F: Fn() + Send + Sync + 'static,

Execute function f before each worker thread stops.

This is initially intended for bookkeeping and monitoring uses. The f will be deconstructed after the builder is deconstructed and all threads in the pool has executed it.

pub fn create(&mut self) -> CpuPool

Create CpuPool with configured parameters

Panics

Panics if pool_size == 0.

Trait Implementations

impl Debug for Builder

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.