What's the difference between an exclusive lock and a shared lock?

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According to wikipedia:

Shared locks are sometimes called "read locks" and exclusive locks are sometimes called "write locks".

Can you explain the reasoning behind the terms "shared" and "exclusive"?

shared-lock exclusive-lock locks locking unix
5 Answers

  • Exclusive lock doesn't allow read and write operations.

  • Shared lock allows only read operation.

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