Date: Wed, 12 Dec 2018 22:05:04 -0800 From: Steve Kargl <sgk@troutmask.apl.washington.edu> To: Andrew Kelley <andrew@ziglang.org> Cc: freebsd-hackers@freebsd.org Subject: Re: raise() implementation in freebsd libc vs musl libc Message-ID: <20181213060504.GA43628@troutmask.apl.washington.edu> In-Reply-To: <70c7214e-3619-115d-abca-09853a1729a6@ziglang.org> References: <70c7214e-3619-115d-abca-09853a1729a6@ziglang.org>
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On Thu, Dec 13, 2018 at 12:11:21AM -0500, Andrew Kelley wrote: > > I noticed that musl-libc blocks signals in raise() to prevent a race > condition, but freebsd libc does not. is there a reason it's necessary > on linux and not freebsd? > > if (__sys_thr_self(&id) == -1) > return (-1); > return (__sys_thr_kill(id, s)); The answer probably lies in the meaining of '_thr_' in the above function names. See src/sys/kern/kern_thr.c. -- Steve
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