Re: Problem using fork, shared memory

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#3637

From: Henk Borsje
Date: Tue, 03 Feb 1998 00:00

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Hello folks,

The man pages are clear about what 'fork' inherits. It does include
attached shared memory sections.  So just make sure you create your
shared memory before you fork, and all pointers will be correct.

FWIW: A general comment about pointers stored in shared memory.  I found
it the easiest to express the pointers as an offset to the begin address
of the global section. When you need to access the data that your
pointer is pointing to, all that needs to be done is add the address of
the global section in the application to this pointer. This will make
your final addresss calculation the same in all your components that use
the shared memory.

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From: Henk Borsje <Henk@*NOSPAM*alert-systems.com>
Subject: Re: Problem using fork, shared memory
Date: 1998/02/03
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