Date: Mon, 25 Jan 1999 13:06:28 -0800 (PST) From: Tom <tom@uniserve.com> To: Gustavo Vieira Goncalves Coelho Rios <grios@netshell.vicosa.com.br> Cc: stable@FreeBSD.ORG Subject: Re: semaphores Message-ID: <Pine.BSF.4.02A.9901251304350.6161-100000@shell.uniserve.ca> In-Reply-To: <Pine.LNX.4.05.9901251756540.1250-100000@netshell.vicosa.com.br>
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On Mon, 25 Jan 1999, Gustavo Vieira Goncalves Coelho Rios wrote: > i am trying to implement a readers/writers solution using concurrency > control. > But the problem is: When i used POSIX.1b to get concurrency control > working, i realized that FreeBSd simply does not support it. > there is not a semaphore.h header in any fs!!! > Another problem: As FreeBSD does not support POSIX.1b i decided to use > SYSVSEM, but my kernel does not support it. Why don't you build a kernel with SYSVSEM then? > It's impossible, if there is no way to use semphores in FreeBSD (the only > two way i know don't work) in the scenario i am. So there is two options: > a) None program in my system is using semaphores, any server, etc. This is true. Concurrency control can be done other ways. No system utilities use it. > b) there is a thirdy way to get semaphores which i don't know, if so, can > anybody explain me. Lots of different ways, including SysV semaphores. > --- > I use UNIX because reboots are for hardware upgrades. > You use windowze because the guy on TV told you to ... > ----- Gustavo Rios ----- Tom To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-stable" in the body of the message
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