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Date:      Wed, 19 Sep 2007 12:28:58 -0400
From:      Jung-uk Kim <jkim@FreeBSD.org>
To:        Maxime Henrion <mux@FreeBSD.org>
Cc:        freebsd-acpi@FreeBSD.org, freebsd-current@FreeBSD.org
Subject:   Re: [PATCH] OsdSynch.c modernization
Message-ID:  <200709191229.00966.jkim@FreeBSD.org>
In-Reply-To: <20070919150348.GB73569@elvis.mu.org>
References:  <200709181516.11207.jkim@FreeBSD.org> <20070919150348.GB73569@elvis.mu.org>

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On Wednesday 19 September 2007 11:03 am, Maxime Henrion wrote:
> Out of curiosity, is there any reason you didn't use the sema(9)
> API for semaphores and are instead implementing them in terms of
> mutex/condvar?

sema(9) can only increment/decrement value by one while 
AcpiOs*Semaphore() allows any positive units <= maximum units.  
Internally ACPI-CA does not use units > 1 but I want it to be more 
closer to the original intention.  In fact, Linux OSD code does not 
support units > 1. ;-)

Jung-uk Kim



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