Last Updated：2025/11/29

(computing, programming) An instruction that enforces an ordering constraint on memory operations issued before and after it.

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memory barrier

Source Word

memory barrier

(computing, programming) An instruction that enforces an ordering constraint on memory operations issued before and after it.

Japanese Meaning

（コンピュータやプログラミングの文脈で）メモリ操作の順序を制御するための命令。具体的には、命令の前後にあるメモリ操作の実行順序を保証し、不整合な動作を防ぐ。

To ensure correct synchronization across threads, you must insert a memory barrier between the write and the subsequent read.

スレッド間の正しい同期を保証するために、書き込みとそれに続く読み取りの間にメモリバリアを挿入する必要がある。

Sense（1）

(computing, programming) An instruction that enforces an ordering constraint on memory operations issued before and after it.

Memory barriers are necessary because most modern CPUs employ performance optimizations that can result in out-of-order execution.

memory barriers

（ plural ）