arena_spin_trylock(9)

💅 arena_spin_trylock(9) — the Kernel API Manual glow-up ✨

okay so bestie, welcome to arena_spin_trylock(9), part of the Kernel API Manual (yes, the manual manual, section 9, we're fancy). sit down, hydrate, and let me tell you about the one function that's out here asking "can i have the lock? 👀" instead of just taking it like some kind of menace.

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🎀 NAME 🎀

arena_spin_trylock — she tries to acquire the queued spinlock. try, okay? it's giving "no pressure, but also i would like the lock" energy. 💅

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✨ SYNOPSIS ✨

int arena_spin_trylock (arena_spinlock_t __arena *lock );

literally that's the whole vibe. one argument. one int coming back at you. no cap. 🦋

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🌸 ARGUMENTS 🌸

• lock — Pointer to queued spinlock structure. that's it, that's the whole thing, it's a pointer to the queued spinlock struct and she is the main character of this call 🫶

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👑 RETURN 👑

• 1 — lock acquired, slay, you got it, go do your thing 🔥
• 0 — failed, no lock for you, don't block on it, just vibe elsewhere 💀

fr fr: this is the try version, so a 0 is not a tragedy, it's just information. bestie asked, bestie got told no. move on. 💖

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🌈 SEE ALSO 🌈

• Kernel file
• ./tools/testing/selftests/bpf/libarena/include/bpf_arena_spin_lock.h
• xchg_tail(9)
• clear_pending(9)
• clear_pending_set_locked(9)
• set_locked(9)
• arena_spin_lock(9)
• arena_spin_unlock(9)

the whole friend group, honestly. iykyk 🧚

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⭐ little reminder key: 1 = you're in, 0 = you're not, and lock is always a pointer to a queued spinlock structure. every single detail preserved, periodt. 💜

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and that's the page!! footer cuteness incoming: this one's sourced from ./tools/testing/selftests/bpf/... and dated October 2026, and it signs off as arena_spin_trylock(9) — so like, screenshot the receipt, she's iconic 🎀🦋💖