futex_dec(9)

futex_dec(9) 💅

okay so this little icon lives in the Kernel API Manual, and she is literally all about the atomic decrement of the futex value. no cap, she's tiny but useful 🫶

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✨ NAME ✨

futex_dec — atomic decrement of the futex value

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🦋 SYNOPSIS 🦋

the whole signature is literally this, bestie:

u_int32_t futex_dec (futex_t *uaddr );

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🎀 ARGUMENTS 🎀

• uaddr — the address of the futex to be modified 💅

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💖 DESCRIPTION 💖

the description is short and iconic: it returns the new futex value. that's the whole tea ☕. she's not doing the most, she's just handing you the new futex value back, periodt ✨

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🌈 SEE ALSO 🌈

• Kernel file: ./tools/testing/selftests/futex/include/futextest.h
• also check out: futex(9), futex_wait(9), futex_wake(9), futex_wait_bitset(9), futex_wake_bitset(9), futex_lock_pi(9), futex_unlock_pi(9), futex_wake_op(9), futex_requeue(9), futex_cmp_requeue(9), futex_wait_requeue_pi(9), futex_cmp_requeue_pi(9), futex_cmpxchg(9), futex_inc(9), futex_set(9)

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source/version: ./tools/testing/selftests/fute..., date: October 2026, page: futex_dec(9) — byeee bestie 🎀