error.rs.html -- source

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aho_corasick

packed

teddy

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ansi_term

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arrayvec

array.rs array_string.rs char.rs errors.rs lib.rs maybe_uninit_stable.rs range.rs

atty

backtrace

backtrace

libunwind.rs mod.rs

symbolize

dladdr.rs libbacktrace.rs mod.rs

capture.rs lib.rs print.rs types.rs

backtrace_sys

base64

write

encoder.rs mod.rs

chunked_encoder.rs decode.rs display.rs encode.rs lib.rs tables.rs

bincode

de

ser

config.rs error.rs internal.rs lib.rs

bitflags

byteorder

bytes

buf

buf.rs buf_mut.rs chain.rs from_buf.rs into_buf.rs iter.rs mod.rs reader.rs take.rs vec_deque.rs writer.rs

bytes.rs debug.rs lib.rs

c2_chacha

capnp

capnp_futures

lib.rs read_stream.rs serialize.rs write_queue.rs

capnp_rpc

attach.rs broken.rs forked_promise.rs lib.rs local.rs queued.rs rpc.rs sender_queue.rs split.rs task_set.rs twoparty.rs

cfg_if

chrono

format

mod.rs parse.rs parsed.rs scan.rs strftime.rs

naive

date.rs datetime.rs internals.rs isoweek.rs time.rs

offset

fixed.rs local.rs mod.rs utc.rs

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clap

crossbeam_deque

crossbeam_epoch

sync

list.rs mod.rs queue.rs

atomic.rs collector.rs default.rs deferred.rs epoch.rs guard.rs internal.rs lib.rs

crossbeam_queue

array_queue.rs err.rs lib.rs seg_queue.rs

crossbeam_utils

atomic

atomic_cell.rs consume.rs mod.rs

sync

mod.rs parker.rs sharded_lock.rs wait_group.rs

backoff.rs cache_padded.rs lib.rs thread.rs

ctrlc

platform

unix

error.rs lib.rs signal.rs

daemon

daemon.rs lib.rs linux.rs singleton.rs

failure

backtrace

internal.rs mod.rs

error

error_impl.rs mod.rs

as_fail.rs box_std.rs compat.rs context.rs error_message.rs lib.rs macros.rs result_ext.rs sync_failure.rs

failure_derive

flexi_logger

writers

file_log_writer.rs log_writer.rs mod.rs

flexi_error.rs flexi_logger.rs formats.rs lib.rs log_specification.rs logger.rs primary_writer.rs reconfiguration_handle.rs

fnv

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sink

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stream

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task_impl

std

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atomic_task.rs core.rs mod.rs

unsync

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executor.rs lib.rs lock.rs poll.rs resultstream.rs task.rs

getrandom

error.rs error_impls.rs lib.rs linux_android.rs use_file.rs util.rs util_libc.rs

glob

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unicode

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error.rs ffi.rs lib.rs

install_service

install_service.rs

iovec

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inline_lazy.rs lib.rs

libc

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linux_like

linux

gnu

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x86_64

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align.rs mod.rs

align.rs mod.rs

align.rs mod.rs

fixed_width_ints.rs lib.rs macros.rs

lock_api

lib.rs mutex.rs remutex.rs rwlock.rs

log

lib.rs macros.rs

memchr

x86

avx.rs mod.rs sse2.rs

fallback.rs iter.rs lib.rs naive.rs

memoffset

lib.rs offset_of.rs span_of.rs

mio

mio_uds

datagram.rs lib.rs listener.rs socket.rs stream.rs

nanoid

alphabet.rs generator.rs lib.rs random.rs

net2

sys

unix

impls.rs mod.rs

ext.rs lib.rs socket.rs tcp.rs udp.rs unix.rs utils.rs

nix

nodrop

num_cpus

num_integer

lib.rs roots.rs

num_traits

ops

checked.rs inv.rs mod.rs mul_add.rs saturating.rs wrapping.rs

bounds.rs cast.rs float.rs identities.rs int.rs lib.rs macros.rs pow.rs sign.rs

open

parking_lot

condvar.rs deadlock.rs elision.rs lib.rs mutex.rs once.rs raw_mutex.rs raw_rwlock.rs remutex.rs rwlock.rs util.rs

parking_lot_core

thread_parker

linux.rs mod.rs

lib.rs parking_lot.rs spinwait.rs util.rs word_lock.rs

pem

errors.rs lib.rs

ppv_lite86

x86_64

lib.rs soft.rs types.rs

proc_macro2

fallback.rs lib.rs strnom.rs wrapper.rs

quote

ext.rs format.rs ident_fragment.rs lib.rs runtime.rs spanned.rs to_tokens.rs

rand

rand_chacha

chacha.rs lib.rs

rand_core

block.rs error.rs impls.rs le.rs lib.rs os.rs

rand_hc

hc128.rs lib.rs

rand_isaac

isaac.rs isaac64.rs isaac_array.rs lib.rs

rand_jitter

dummy_log.rs error.rs lib.rs platform.rs

rand_os

dummy_log.rs lib.rs linux_android.rs random_device.rs

rand_pcg

lib.rs pcg128.rs pcg64.rs

rand_xorshift

rcgen

regex

regex_syntax

remove_dir_all

ring

rustc_demangle

legacy.rs lib.rs v0.rs

rustls

scoped_tls

scopeguard

sct

serde

de

from_primitive.rs ignored_any.rs impls.rs mod.rs utf8.rs value.rs

private

de.rs macros.rs mod.rs ser.rs

ser

impls.rs impossible.rs mod.rs

export.rs integer128.rs lib.rs macros.rs

slab

smallvec

spin

lib.rs mutex.rs once.rs rw_lock.rs

stream_cancel

combinator.rs lib.rs wrapper.rs

strsim

syn

synstructure

lib.rs macros.rs

tempfile

file

imp

dir.rs error.rs lib.rs spooled.rs util.rs

textwrap

indentation.rs lib.rs splitting.rs

thread_local

lib.rs thread_id.rs unreachable.rs

time

display.rs duration.rs lib.rs parse.rs sys.rs

tokio

codec

length_delimited.rs mod.rs

executor

current_thread

reactor

mod.rs poll_evented.rs

runtime

current_thread

builder.rs mod.rs runtime.rs

threadpool

builder.rs mod.rs shutdown.rs task_executor.rs

util

enumerate.rs future.rs mod.rs stream.rs

clock.rs fs.rs io.rs lib.rs net.rs prelude.rs sync.rs timer.rs

tokio_codec

bytes_codec.rs lib.rs lines_codec.rs

tokio_core

tokio_current_thread

lib.rs scheduler.rs

tokio_executor

enter.rs error.rs executor.rs global.rs lib.rs park.rs typed.rs

tokio_fs

tokio_io

tokio_reactor

background.rs lib.rs poll_evented.rs registration.rs sharded_rwlock.rs

tokio_rustls

common

mod.rs vecbuf.rs

client.rs lib.rs server.rs

tokio_sync

mpsc

block.rs bounded.rs chan.rs list.rs mod.rs unbounded.rs

task

atomic_task.rs mod.rs

lib.rs lock.rs loom.rs oneshot.rs semaphore.rs watch.rs

tokio_tcp

incoming.rs lib.rs listener.rs stream.rs

tokio_threadpool

tokio_timer

tokio_udp

frame.rs lib.rs recv_dgram.rs send_dgram.rs socket.rs

tokio_uds

datagram.rs frame.rs incoming.rs lib.rs listener.rs recv_dgram.rs send_dgram.rs stream.rs ucred.rs

unicode_width

lib.rs tables.rs

unicode_xid

lib.rs tables.rs

untrusted

vec_map

void

webpki

calendar.rs cert.rs der.rs error.rs name.rs signed_data.rs time.rs trust_anchor_util.rs verify_cert.rs webpki.rs

windows_service

x11

dpms.rs glx.rs internal.rs keysym.rs lib.rs link.rs xcursor.rs xf86vmode.rs xfixes.rs xft.rs xinerama.rs xinput.rs xinput2.rs xlib.rs xlib_xcb.rs xmd.rs xmu.rs xrandr.rs xrecord.rs xrender.rs xss.rs xt.rs xtest.rs

xcb

ffi

base.rs big_requests.rs xc_misc.rs xkb.rs xproto.rs

base.rs big_requests.rs lib.rs xc_misc.rs xkb.rs xproto.rs

xkbcommon

xkb

x11

compose.rs ffi.rs keysyms.rs mod.rs

yasna

deserializer

models

der.rs mod.rs oid.rs time.rs

reader

error.rs mod.rs

serializer

tags

writer

use std::error::Error;
use std::fmt;

/// Errors returned by `Executor::spawn`.
///
/// Spawn errors should represent relatively rare scenarios. Currently, the two
/// scenarios represented by `SpawnError` are:
///
/// * An executor being at capacity or full. As such, the executor is not able
///   to accept a new future. This error state is expected to be transient.
/// * An executor has been shutdown and can no longer accept new futures. This
///   error state is expected to be permanent.
#[derive(Debug)]
pub struct SpawnError {
    is_shutdown: bool,
}

impl SpawnError {
    /// Return a new `SpawnError` reflecting a shutdown executor failure.
    pub fn shutdown() -> Self {
        SpawnError { is_shutdown: true }
    }

    /// Return a new `SpawnError` reflecting an executor at capacity failure.
    pub fn at_capacity() -> Self {
        SpawnError { is_shutdown: false }
    }

    /// Returns `true` if the error reflects a shutdown executor failure.
    pub fn is_shutdown(&self) -> bool {
        self.is_shutdown
    }

    /// Returns `true` if the error reflects an executor at capacity failure.
    pub fn is_at_capacity(&self) -> bool {
        !self.is_shutdown
    }
}

impl fmt::Display for SpawnError {
    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
        write!(fmt, "{}", self.description())
    }
}

impl Error for SpawnError {
    fn description(&self) -> &str {
        "attempted to spawn task while the executor is at capacity or shut down"
    }
}