Messages in this thread |  | | Date | Wed, 31 Jul 96 07:26 CDT | Subject | Re: posix 4 extensions | From | (Johnie Stafford) |
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>>> On Wed, 31 Jul 1996 09:12:35 +0200, Volker Eberlein Guest at ROBERT BOSCH GmbH FV/SLH <volker.eberlein@fr.bosch.de> said:
ve> Johnie Stafford wrote: >> What about the posix.4 shared memory objects? Any chance we might ever >> see them? The ability to map shared memory segments to the same >> logical address in several different processes would make the use of >> pointers in shared memory possible. >> >> Johnie >>
ve> Though I am pretty anxiously waiting for the posix.1b/posix.4 ve> features as well, I would like you to take notice of the fact ve> that the feature of attaching a shared mem segment to a specified ve> address is already given with SysV IPC.
ve> shm_root_p = shmat (shm_id, (char *)0xa0000000 ,0);
ve> is a possible action. But anyway: the 'clean' solution for pointers ve> in shared memory would always be having addresses relative to the ve> segment's borders.
That is more-or-less what we do, but I really hate specifying an absolute address in a program.
Johnie
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