site_archiver@lists.apple.com Delivered-To: darwin-dev@lists.apple.com Dkim-signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:received:received:message-id:date:from:to :subject:cc:in-reply-to:mime-version:content-type :content-transfer-encoding:content-disposition:references; bh=DNnzPtJO0SevcZVNIN4V68TS08Lub9pJTU5iqdNrk20=; b=lNPBPgQ1EYK+9yFU/Sgz4OhiLEOGsotjouXR/vQ4LsIXYmJa5n9iIFJySBFDU71xLg 1poaJ6gp3vae6HC9GuK98c6I4cCHjwlySJa6yxxbbjFDhnm7Yp9WSuFchsAg2It78Rva t6l59Vvf0oim+2FvzMwn5/LFrmqo/GzQwfBo4= Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=message-id:date:from:to:subject:cc:in-reply-to:mime-version :content-type:content-transfer-encoding:content-disposition :references; b=DmYFOS2L2zbolFw1m5Jy79pNte6fspJOpcm2dvRVgyP+AXv8FlGwQHF33nx2OZ3M/D Y4CV220VyK0SsPYInDRWqNR7LYar1Zc+kJVro/JhLWRoAcu7L9XSehcY33mQoeF7gf6B IReRpv82Z8kxR65tSJB09xHGcYQeKGRG2Z4KM= Is it possible to use semget() without using ftok() for IPC communication? Please suggest me. Regards rksinghal On Fri, Nov 28, 2008 at 9:54 AM, Rakesh Singhal <rakesh.singhal@gmail.com> wrote:
Thanks. Now I am using following set of APIs:
ftok() semget() semop() semctl()
It is working till now :)
Regards rksinghal
On Thu, Nov 27, 2008 at 9:49 AM, Terry Lambert <tlambert@apple.com> wrote:
On Nov 26, 2008, at 7:31 PM, Rakesh Singhal wrote:
Hi all
I tried to use sem_init() but I think it is not there to use. It is declared in semaphore.h but when I do man sem_init() then it gives the message "No manual entry for sem_init".
Now, I am using sem_open(). I think it is right API to create unique semaphore between multi-processes. But creating it in one process if I try to create in another process, the value of semaphore is not same. I am using same name in both process(1st argument of sem_open()).
Please suggest to create semaphore (cross-processes).
POSIX unnamed semaphores are not supported.
Use either POSIX named semaphores, or use System V semaphores:
man sem_open man semget
-- Terry
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