Date: Mon, 19 Dec 2011 17:31:57 -0500 (EST) From: Daniel Eischen <deischen@freebsd.org> To: Niall Douglas <s_sourceforge@nedprod.com> Cc: threads@freebsd.org, arch@freebsd.org Subject: Re: [Patch] C1X threading support Message-ID: <Pine.GSO.4.64.1112191730110.25434@sea.ntplx.net> In-Reply-To: <4EEF9235.31023.B2519C9A@s_sourceforge.nedprod.com> References: <20111216214913.GA1771@hoeg.nl> <4EEF9235.31023.B2519C9A@s_sourceforge.nedprod.com>
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On Mon, 19 Dec 2011, Niall Douglas wrote: > On 16 Dec 2011 at 22:49, Ed Schouten wrote: > >> In my opinion the ISO folks suffer a bit from the Not Invented Here >> syndrome. In an earlier revision of the C1X specification, they even >> described a `struct xtime', which had a purpose identical to `struct >> timespec'. The same holds for the threading API. It can be 1:1 mapped to >> a subset of pthread -- why not simply standardize that subset then? > > As someone who sits on said committees, I can tell you that the > reason why was because at the beginning it was thought that the C1X > threading API would diverge significantly from the POSIX API. Indeed, > early drafts of the standard had quite a number of changes. However, > just recently almost all of those changes have been excised due to > pressures from the system vendors and the C++ committee who came in > quite late on wanting feature parity between the two, and C++ had > chosen a specific subset of POSIX rather than doing anything to try > and fix its known problems. > > Obviously, had we known that from the beginning, things would have > been done differently. However, there was - in hindsight - a lack of > realisation just how expensive any significant changes would appear > to vendors. And why on earth would the thought of having a threading API significantly different from the POSIX API even be on the table? It boggles the mind. -- DE
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