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Article #11109Re: synchronizing access to named mutexes
From: Dennis Jones
Date: Fri, 27 Feb 2004 16:24
Date: Fri, 27 Feb 2004 16:24
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"Bob Gonder" <notbg@notmindspring.invalid> wrote in message news:dhnu305gp72fdko73lfr2ckr0ps4l7ltf5@4ax.com... > Dennis Jones wrote: > > >Communications synchronization is managed with a pair of named mutexes. > >After calling CreateProcess to start the EXE, the DLL sleeps for 1 second > >before sending any commands to the EXE, which typically gives the EXE enough > > >never respond to the command. So my question is, how can the DLL know when > >the EXE has opened the memory-mapped file and named mutexes, and is ready to > >begin receiving requests? > > Aren't the signaling mechanisms you employ 2-way? > The DLL could wait for a signal. The EXE would set the signal after > it has warmed up. No, I don't think so...if the DLL waits on the mutex before the EXE has opened a handle to it, the wait call will succeed immediately because the DLL will already have ownership of the mutex (because it created it). - Dennis
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10cc67,147e3de49808f5a X-Google-Attributes: gid10cc67,public X-Google-ArrivalTime: 2004-02-27 08:40:59 PST From: "Dennis Jones" <djones@nospam.com> Newsgroups: borland.public.cppbuilder.nativeapi References: <403ea9c9$1@newsgroups.borland.com> <dhnu305gp72fdko73lfr2ckr0ps4l7ltf5@4ax.com> Subject: Re: synchronizing access to named mutexes Date: Fri, 27 Feb 2004 08:24:45 -0800 Lines: 27 X-Priority: 3 X-MSMail-Priority: Normal X-Newsreader: Microsoft Outlook Express 6.00.2800.1158 X-MimeOLE: Produced By Microsoft MimeOLE V6.00.2800.1165 NNTP-Posting-Host: 204.200.27.7 Message-ID: <403f6f4c$1@newsgroups.borland.com> X-Trace: newsgroups.borland.com 1077899084 204.200.27.7 (27 Feb 2004 08:24:44 -0800) Path: arc1-ca.pugleaf.net!archiver1.google.com!news1.google.com!sn-xit-02!sn-xit-01!sn-xit-09!supernews.com!newshosting.com!nx01.iad01.newshosting.com!newsfeed.icl.net!newsfeed.fjserv.net!newsfeed00.sul.t-online.de!newsfeed01.sul.t-online.de!t-online.de!newsgroups.borland.com!not-for-mail