Atomic
struct Atomic(T)
Overview
A value that may be updated atomically.
Only primitive integer types, reference types or nilable reference types can be used with an Atomic type.
Defined in:
atomic.crClass Method Summary
- .new(value : T)
Creates an Atomic with the given initial value.
Instance Method Summary
- #add(value : T)
Performs
atomic_value += value
. - #and(value : T)
Performs
atomic_value &= value
. - #compare_and_set(cmp : T, new : T) : Tuple(T, Bool)
Compares this atomic's value with cmp:
- #get
Atomically returns this atomic's value.
- #lazy_get
Non-atomically returns this atomic's value.
- #lazy_set(value : T)
Non-atomically sets this atomic's value to value.
- #max(value : T)
Performs
atomic_value = max(atomic_value, value)
. - #min(value : T)
Performs
atomic_value = min(atomic_value, value)
. - #nand(value : T)
Performs
atomic_value = ~(atomic_value & value)
. - #or(value : T)
Performs
atomic_value |= value
. - #set(value : T)
Atomically sets this atomic's value to value.
- #sub(value : T)
Performs
atomic_value -= value
. - #swap(value : T)
Atomically sets this atomic's value to value.
- #xor(value : T)
Performs
atomic_value ^= value
.
Instance methods inherited from struct Struct
==(other : self) : Bool ==, hash : Int32 hash, inspect(io : IO) : Nil inspect, pretty_print(pp) : Nil pretty_print, to_s(io) to_s Instance methods inherited from struct Value
==(other) ==, dup dup Instance methods inherited from class Object
!=(other) !=, !~(other) !~, ==(other) ==, ===(other : JSON::Any)===(other : YAML::Any)
===(other) ===, =~(other) =~, class class, dup dup, hash hash, inspect(io : IO)
inspect inspect, itself itself, not_nil! not_nil!, pretty_inspect(width = 79, newline = "\n", indent = 0) : String pretty_inspect, pretty_print(pp : PrettyPrint) : Nil pretty_print, tap(&block) tap, to_json(io : IO)
to_json to_json, to_pretty_json(indent : String = " ")
to_pretty_json(io : IO, indent : String = " ") to_pretty_json, to_s
to_s(io : IO) to_s, to_yaml(io : IO)
to_yaml to_yaml, try(&block) try
Class methods inherited from class Object
from_json(string_or_io, root : String) : selffrom_json(string_or_io) : self from_json, from_yaml(string_or_io) : self from_yaml
Class Method Detail
def self.new(value : T)Source
Creates an Atomic with the given initial value.
Instance Method Detail
def add(value : T)Source
Performs atomic_value += value
. Returns the old value.
atomic = Atomic.new(1) atomic.add(2) # => 1 atomic.get # => 3
def and(value : T)Source
Performs atomic_value &= value
. Returns the old value.
atomic = Atomic.new(5) atomic.and(3) # => 5 atomic.get # => 1
def compare_and_set(cmp : T, new : T) : Tuple(T, Bool)Source
Compares this atomic's value with cmp:
- if they are equal, sets the value to new, and returns
{old_value, true}
- if they are not equal the value remains the same, and returns
{old_value, false}
atomic = Atomic.new(1) atomic.compare_and_set(2, 3) # => {1, false} atomic.get # => 1 atomic.compare_and_set(1, 3) # => {1, true} atomic.get # => 3
def getSource
Atomically returns this atomic's value.
def lazy_getSource
Non-atomically returns this atomic's value.
def lazy_set(value : T)Source
Non-atomically sets this atomic's value to value. Returns the new value.
atomic = Atomic.new(5) atomic.lazy_set(10) # => 10 atomic.get # => 10
def max(value : T)Source
Performs atomic_value = max(atomic_value, value)
. Returns the old value.
atomic = Atomic.new(5) atomic.max(3) # => 5 atomic.get # => 5 atomic.max(10) # => 5 atomic.get # => 10
def min(value : T)Source
Performs atomic_value = min(atomic_value, value)
. Returns the old value.
atomic = Atomic.new(5) atomic.min(10) # => 5 atomic.get # => 5 atomic.min(3) # => 5 atomic.get # => 3
def nand(value : T)Source
Performs atomic_value = ~(atomic_value & value)
. Returns the old value.
atomic = Atomic.new(5) atomic.nand(3) # => 5 atomic.get # => -2
def or(value : T)Source
Performs atomic_value |= value
. Returns the old value.
atomic = Atomic.new(5) atomic.or(2) # => 5 atomic.get # => 7
def set(value : T)Source
Atomically sets this atomic's value to value. Returns the new value.
atomic = Atomic.new(5) atomic.set(10) # => 10 atomic.get # => 10
def sub(value : T)Source
Performs atomic_value -= value
. Returns the old value.
atomic = Atomic.new(9) atomic.sub(2) # => 9 atomic.get # => 7
def swap(value : T)Source
Atomically sets this atomic's value to value. Returns the old value.
atomic = Atomic.new(5) atomic.swap(10) # => 5 atomic.get # => 10
def xor(value : T)Source
Performs atomic_value ^= value
. Returns the old value.
atomic = Atomic.new(5) atomic.xor(3) # => 5 atomic.get # => 6
© 2012–2017 Manas Technology Solutions.
Licensed under the Apache License, Version 2.0.
https://crystal-lang.org/api/0.22.0/Atomic.html