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Atomics (Atomic operation, ) .
SharedArrayBuffer ArrayBuffer .
Atomic . Atomics ,
new
Atomics . Math Atomics
.
. , .
wait() notify() Linux (futex)(" (mutex)")
.
Atomics[@@toStringTag]@@toStringTag "Atomics" . Object.prototype.toString() .
Atomics.add(). .
Atomics.and()AND . .
Atomics.compareExchange(). .
Atomics.exchange(). .
Atomics.isLockFree(size) atomic . atomic atomic ( ) true . .
Atomics.load().
Atomics.notify(). .
Atomics.or()OR . .
Atomics.store(). .
Atomics.sub(). .
Atomics.wait() . "ok", "not-equal" "timed-out" . . ( wait() .)
Atomics.waitAsync()Atomics.xor()XOR . .
const sab = new SharedArrayBuffer(1024);
const ta = new Uint8Array(sab);
ta[0]; // 0
ta[0] = 5; // 5
Atomics.add(ta, 0, 12); // 5
Atomics.load(ta, 0); // 17
Atomics.and(ta, 0, 1); // 17
Atomics.load(ta, 0); // 1
Atomics.compareExchange(ta, 0, 5, 12); // 1
Atomics.load(ta, 0); // 1
Atomics.exchange(ta, 0, 12); // 1
Atomics.load(ta, 0); // 12
Atomics.isLockFree(1); // true
Atomics.isLockFree(2); // true
Atomics.isLockFree(3); // false
Atomics.isLockFree(4); // true
Atomics.or(ta, 0, 1); // 12
Atomics.load(ta, 0); // 13
Atomics.store(ta, 0, 12); // 12
Atomics.sub(ta, 0, 2); // 12
Atomics.load(ta, 0); // 10
Atomics.xor(ta, 0, 1); // 10
Atomics.load(ta, 0); // 11
Int32Array
const sab = new SharedArrayBuffer(1024);
const int32 = new Int32Array(sab);
0 0 sleep . . . (123)
Atomics.wait(int32, 0, 0);
console.log(int32[0]); // 123
.
console.log(int32[0]); // 0;
Atomics.store(int32, 0, 123);
Atomics.notify(int32, 0, 1);
| Specification |
|---|
| ECMAScript 2027 LanguageSpecification # sec-atomics-object |
ArrayBufferThis page was last modified on 2024 12 17 by MDN contributors.
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