Article View: comp.os.ms-windows.programmer.misc
Article #2927Re: How to avoid multiple instances of a program in NT and 95?
From: Richard Baldwin
Date: Tue, 04 Feb 1997 00:00
Date: Tue, 04 Feb 1997 00:00
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In article <01bc11ec$dfe21120$b8bfabc7@pongo>, Mickey Williams <mickeyw@deltanet.com> writes >Alois Buecherl <Alois.Buecherl@terraSat.de> wrote in article <5d4eeb$n6u$1@euler >.space.net>... >> Hello, >> I've been striving for so long now to find a SAVE way to start only one >> instance of my C++ program under Windows NT and 95. As you might recall, this >> used to be that easy in Windows 3.1 using the prevInstance variable. Now this >> option is gone. >> I've tried using a semaphore that get's locked when the programm's up. But >> it still can happen, that the program starts up more than once when multiple >> prgram spawns occur very rapidly. The program then did not get enough >> startup-time to create and lock the semaphore. >> Is there ANY solution to this problem? > >Create a mutex when your program starts up. GetLastError will return >ERROR_ALREADY_EXISTS if the mutex name is already created. > Does this method work under Win32s? -- Richard Baldwin
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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 1124cf,3403ef0501dd273 X-Google-Attributes: gid1124cf,public X-Google-Thread: 113dfb,3403ef0501dd273 X-Google-Attributes: gid113dfb,public X-Google-Thread: f6ef4,3403ef0501dd273 X-Google-Attributes: gidf6ef4,public X-Google-Thread: 105df1,3403ef0501dd273 X-Google-Attributes: gid105df1,public From: Richard Baldwin <richard@ormesci.demon.co.uk> Subject: Re: How to avoid multiple instances of a program in NT and 95? Date: 1997/02/04 Message-ID: <3Kq8KAA+ax9yEwPr@ormesci.demon.co.uk> X-Deja-AN: 214347594 distribution: world x-nntp-posting-host: ormesci.demon.co.uk references: <5d4eeb$n6u$1@euler.space.net> <01bc11ec$dfe21120$b8bfabc7@pongo> organization: Orme Scientific mime-version: 1.0 newsgroups: comp.os.ms-windows.programmer.misc,comp.os.ms-windows.programmer.win32,de.comp.os.ms-windows.programmer,fido.ger.windows.prog