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help / color / mirror / Atom feedFrom: Nathan Bossart <[email protected]>
To: Tom Lane <[email protected]>
Cc: [email protected]
Subject: Re: small cleanup for s_lock.h
Date: Thu, 7 May 2026 16:12:09 -0500
Message-ID: <af0AKUfzjGDvQdBk@nathan> (raw)
In-Reply-To: <afz5FHWr6rOB7bsL@nathan>
References: <afkUeI7UhacZ5ZFm@nathan>
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<afoWBgsygtkCNCRQ@nathan>
<[email protected]>
<afovdi61nybDRbC3@nathan>
<afz5FHWr6rOB7bsL@nathan>
On Thu, May 07, 2026 at 03:41:56PM -0500, Nathan Bossart wrote:
> +/*
> + * We can only define TAS_SPIN if TAS was defined. Otherwise, the platform
> + * defined its own S_LOCK without TAS, and therefore is responsible for
> + * defining its own TAS_SPIN as well. (Note that we currently do not have any
> + * platforms that don't define TAS.)
> + */
> #if !defined(TAS_SPIN)
> +#if defined(TAS)
> #define TAS_SPIN(lock) TAS(lock)
> -#endif /* TAS_SPIN */
> +#else
> +#error Neither TAS nor TAS_SPIN defined on this platform. Please report this to [email protected].
> +#endif /* TAS */
> +#endif /* ! TAS_SPIN */
Wait, this isn't right. TAS_SPIN is only used by s_lock(), which is only
used by the default S_LOCK. We should just not compile s_lock() if the
platform defines its own S_LOCK, and we shouldn't #error here if TAS is not
defined.
--
nathan
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To: [email protected]
Cc: [email protected], [email protected]
Subject: Re: small cleanup for s_lock.h
In-Reply-To: <af0AKUfzjGDvQdBk@nathan>
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