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.

Author

Haixing Hu

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<(), Error>

Formats the value using the given formatter.

impl Display for ThreadPoolBuildError

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

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) -> ThreadPoolBuildError

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.

impl From<ThreadPoolBuildError> for ExecutionServicesBuildError

fn from(source: ThreadPoolBuildError) -> Self

Converts to this type from the input type.