SDL_TryWaitSemaphore(3)

💅 SDL_TryWaitSemaphore(3) 💅

okay bestie, welcome to the SDL3 FUNCTIONS corner of the manual, where we peek at a semaphore and maybe take a lil sip from it 🥤 no waiting around, no drama, just vibes.

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✨ NAME ✨

SDL_TryWaitSemaphore</purl> — see if a semaphore has a positive value and decrement it if it does. it's giving "are you free or are you busy" energy fr fr 🫶

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🌸 SYNOPSIS 🌸

#include <SDL3/SDL_mutex.h>

bool SDL_TryWaitSemaphore(SDL_Semaphore *sem);

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🦋 DESCRIPTION 🦋

so like, this function checks to see if the semaphore pointed to by sem has a positive value, and atomically decrements the semaphore value if it does ✨

and if the semaphore doesn't have a positive value? she does NOT wait. nope. the function immediately returns false and moves on with her life 💅 periodt.

no blocking, no queueing, no "hold on lemme check"—just a quick vibe check and an answer, literally.

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🎀 FUNCTION PARAMETERS 🎀

• sem — the semaphore to wait on. yes queen, that's the one you're checking 👑

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💖 RETURN VALUE 💖

• returns true if the wait succeeds 🌈
• returns false if the wait would block 😭

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🔥 THREAD SAFETY 🔥

it is safe to call this function from any thread. every thread, all the threads, the whole group chat. no cap. 👑

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⭐ AVAILABILITY ⭐

this function is available since SDL 3.2.0. if you're on something older, sorry bestie, she wasn't born yet 🥺

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🌈 SEE ALSO 🌈

• SDL_SignalSemaphore(3)
• SDL_WaitSemaphore(3)
• SDL_WaitSemaphoreTimeout(3)

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okay that's the whole page, mwah 💋 this icon was brought to you by Simple Directmedia Layer, running SDL 3.4.18 — go forth and try-wait responsibly, bestie 🫶✨💅