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atomic    音标拼音: [ət'ɑmɪk]
a. 原子的,原子武器的;核的,核能的

原子的,原子武器的;核的,核能的

atomic
原子 基元

atomic
adj 1: of or relating to or comprising atoms; "atomic
structure"; "atomic hydrogen"
2: (weapons) deriving destructive energy from the release of
atomic energy; "nuclear war"; "nuclear weapons"; "atomic
bombs" [synonym: {nuclear}, {atomic}] [ant: {conventional}]
3: immeasurably small

Atomic \A*tom"ic\, Atomical \A*tom"ic*al\, a. [Cf. F. atomique.]
1. Of or pertaining to atoms.
[1913 Webster]

2. Extremely minute; tiny.
[1913 Webster]

{Atomic bomb}, see {atom bomb} in the vocabulary.

{Atomic philosophy}, or {Doctrine of atoms}, a system which,
assuming that atoms are endued with gravity and motion,
accounted thus for the origin and formation of all things.
This philosophy was first broached by Leucippus, was
developed by Democritus, and afterward improved by
Epicurus, and hence is sometimes denominated the Epicurean
philosophy.

{Atomic theory}, or the {Doctrine of definite proportions}
(Chem.), teaches that chemical combinations take place
between the supposed ultimate particles or atoms of
bodies, in some simple ratio, as of one to one, two to
three, or some other, always expressible in whole numbers.


{Atomic weight} (Chem.), the weight of the atom of an element
as compared with the weight of the atom of hydrogen, taken
as a standard.
[1913 Webster]

66 Moby Thesaurus words for "atomic":
a certain, an, any, any one, atomatic, atomiferous, atomistic,
corpuscular, cyclic, diatomic, dibasic, either, embryonic,
evanescent, exclusive, germinal, granular, heteroatomic,
heterocyclic, hexatomic, homocyclic, impalpable, imperceptible,
imponderable, inappreciable, indiscernible, individual,
indivisible, infinitesimal, intangible, integral, invisible,
irreducible, isobaric, isocyclic, isoteric, isotopic, lone,
microcosmic, microscopic, molecular, monadic, monatomic, monistic,
one, pentatomic, simple, single, singular, sole, solid, solitary,
subatomic, tenuous, tetratomic, thin, triatomic, tribasic,
ultramicroscopic, unanalyzable, undivided, uniform, unique,
unitary, unseeable, whole

(From Greek "atomos", indivisible) Indivisible;
cannot be split up.

For example, an instruction may be said to do several things
"atomically", i.e. all the things are done immediately, and
there is no chance of the instruction being half-completed or
of another being interspersed. Used especially to convey that
an operation cannot be interrupted.

An atomic {data type} has no internal structure visible to the
program. It can be represented by a flat {domain} (all
elements are equally defined). Machine {integers} and
{Booleans} are two examples.

An atomic {database transaction} is one which is guaranteed to
complete successfully or not at all. If an error prevents a
partially-performed transaction from proceeding to completion,
it must be "backed out" to prevent the database being left in
an inconsistent state.

[{Jargon File}]

(2000-04-03)


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  • What does atomic mean in programming? - Stack Overflow
    In the Effective Java book, it states: The language specification guarantees that reading or writing a variable is atomic unless the variable is of type long or double [JLS, 17 4 7] What do
  • c++ - What exactly is std::atomic? - Stack Overflow
    Objects of atomic types are the only C++ objects that are free from data races; that is, if one thread writes to an atomic object while another thread reads from it, the behavior is well-defined In addition, accesses to atomic objects may establish inter-thread synchronization and order non-atomic memory accesses as specified by std::memory_order
  • Is there a difference between the _Atomic type qualifier and type . . .
    Why the standard make that difference? It seems as both designate, in the same way, an atomic type
  • When do I really need to use atomic lt;bool gt; instead of bool?
    Closed 12 years ago Isn't atomic<bool> redundant because bool is atomic by nature? I don't think it's possible to have a partially modified bool value When do I really need to use atomic<bool> instead of bool?
  • atomic operations and atomic transactions - Stack Overflow
    Can someone explain to me, whats the difference between atomic operations and atomic transactions? Its seems to me that these two are the same thing Is that correct?
  • How to initialize a static std::atomic data member
    Since std::atomic_init has been deprecated in C++20, here is a reimplementation which does not raise deprecation warnings, if you for some reason want to keep doing this
  • sql - What is atomicity in dbms - Stack Overflow
    The definition of atomic is hazy; a value that is atomic in one application could be non-atomic in another For a general guideline, a value is non-atomic if the application deals with only a part of the value Eg: The current Wikipedia article on First NF (Normal Form) section Atomicity actually quotes from the introductory parts above
  • Whats the difference between the atomic and nonatomic attributes?
    The last two are identical; "atomic" is the default behavior (note that it is not actually a keyword; it is specified only by the absence of nonatomic -- atomic was added as a keyword in recent versions of llvm clang) Assuming that you are @synthesizing the method implementations, atomic vs non-atomic changes the generated code If you are writing your own setter getters, atomic nonatomic
  • Why load and exchange an std::atomic lt;bool gt;? - Stack Overflow
    @prapin: Avoiding the atomic-RMW attempt is also a big deal on most platforms, but yeah especially x86 where it's a full barrier Read-only can leave the cache line in Shared state, so other cores can read it in parallel, instead of requesting Exclusive state For a spinlock, often you want the first access to be an RMW attempt to optimize for the hopefully-common case of the lock being





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