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Subject: RE: cross-process, named mutex
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Date: Tue, 15 Nov 2005 13:58:49 -0600
Message-ID: <5638BB7F71ECE64081000912579CB2ED174666@prine.may.local>
Thread-Topic: cross-process, named mutex
thread-index: AcXp0h/CJ9vBAL8CQiK2JEpALE4hsQATFXxg
From: "Daniel May" <daniel@spryware.com>
To: "Michael Vergoz" <mv@binarysec.com>
Cc: <dev@apr.apache.org>

Neither  apr_proc_mutex or apr_global_mutex seem to work under Linux.  I =
created a simple single instance case
where I created a named mutex in an test program and paused.  I started =
a second instance and I was granted the mutex.
The lock is not holding.

Daniel


-----Original Message-----
From: Michael Vergoz [mailto:mv@binarysec.com]=20
Sent: Tuesday, November 15, 2005 4:48 AM
To: Daniel May
Subject: Re: cross-process, named mutex

hi,

it's little difficult to make a mutex global in Apache. in normal case =
you may create a shared map with apr_mmap_create() ... and store the =
mutex in it with apr_proc_mutex(). now you can used the apr global mutex =
api to do that with apr_global_mutex_create(). you may have a look at =
the file srclib/apr/locks/unix/global_mutex.c and at =
srclib/apr/test/testglobalmutex.c.

- michael


Le 15 nov. 05 =E0 05:35, Daniel May a =E9crit :

> Is there any way under APR Linux to create a cross-process, named =20
> Mutex
> ?  Under Win32, I simply call CreateMutex() with a name.  Do I have to
> create a piece of shared mem and store the pthreads mutex ?
>
> Daniel May
>
>
>
>
>
>