Enum ThreadPoolBuildError 

pub enum ThreadPoolBuildError {
    ZeroMaximumPoolSize,
    CorePoolSizeExceedsMaximum {
        core_pool_size: usize,
        maximum_pool_size: usize,
    },
    ZeroQueueCapacity,
    ZeroStackSize,
    ZeroKeepAlive,
    SpawnWorker {
        index: usize,
        source: Error,
    },
}

Error returned when a super::thread_pool::ThreadPool cannot be built.

Variants

ZeroMaximumPoolSize

The configured maximum pool size is zero.

CorePoolSizeExceedsMaximum

The configured core pool size is greater than the maximum pool size.

Fields

core_pool_size: usize

Configured core pool size.

maximum_pool_size: usize

Configured maximum pool size.

ZeroQueueCapacity

The configured bounded queue capacity is zero.

ZeroStackSize

The configured worker stack size is zero.

ZeroKeepAlive

The configured keep-alive timeout is zero.

SpawnWorker

A worker thread could not be spawned.

Fields

index: usize

Index of the worker that failed to spawn.

source: Error

I/O error reported by std::thread::Builder::spawn.

Trait Implementations

impl Debug for ThreadPoolBuildError

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

Formats the value using the given formatter.

impl Display for ThreadPoolBuildError

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

Formats the value using the given formatter.

impl Error for ThreadPoolBuildError

fn source(&self) -> Option<&(dyn Error + 'static)>

Returns the lower-level source of this error, if any.

fn description(&self) -> &str

👎Deprecated since 1.42.0:

use the Display impl or to_string()

fn cause(&self) -> Option<&dyn Error>

👎Deprecated since 1.33.0:

replaced by Error::source, which can support downcasting

fn provide<'a>(&'a self, request: &mut Request<'a>)

🔬This is a nightly-only experimental API. (error_generic_member_access)

Provides type-based access to context intended for error reports.

impl From<RejectedExecution> for ThreadPoolBuildError

fn from(error: RejectedExecution) -> Self

Converts rejected-execution reasons into build-time thread-pool errors.

Parameters

• error - Rejection reason observed during thread prestart.

Returns

A build error that preserves equivalent failure context.