C++ and Threads

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#3470

From: Robert Mahoney
Date: Fri, 08 Jan 1993 22:14

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MP>same globel data.  I will have about 300 different lists 
MP>that I will have to protect.  The idea thing is to let as 
MP>many threads read as they like, but only let the lists be 
MP>update by one thread at a time.  Which means that I will 
MP>have to make sure no one is looking at the list when this 
MP>is done.  So, the only way to do it is to use 2 semephores. 
MP> So now I am using at least 600 sems just for the lists.  

I'm sure there is a better way, but all you need is 1 event semaphore
per list.  If the semaphore is posted then any thread that wants to access
the list can do a DosWaitEventSem until it is reset.
 
MP>There are RAM semephore in OS/2 2.0?  I thought RAM 
MP>semephore were taking out?  

   Only 32bit semaphores in OS/2 v2.0 are Event Mutex and MuxWait.
But I do believe a 32bit program can get access to 16 bit
semaphores.

Bob

___
 X MR/2 1.36 #10 X Windows NT: It can talk the talk but can it walk the walk?

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From: Robert.Mahoney@f347.n109.z1.fidonet.org (Robert Mahoney)
Sender: Uucp@blkcat.UUCP
Path: arc1-ca.pugleaf.net!sparky!uunet!blkcat!Uucp
Newsgroups: comp.os.os2.programmer
Subject: C++ and Threads
Message-ID: <726868819.AA00000@blkcat.UUCP>
Date: Fri, 08 Jan 1993 17:14:00 -0500
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