Hello,
i need to manage a heap in shared memory.
Does anybody know about a portable (win32+mac+posi x) c implementation
for this.
21  8382 
In article <11************ **********@o40g 2000prh.googleg roups.com>,
llothar <ll*****@web.de wrote:
>i need to manage a heap in shared memory.
Does anybody know about a portable (win32+mac+posi x) c implementation
for this.
I believe that the win32 interface for shared memory is different
than the posix interface, so as best I know, there is no
implementation that is portable between those three platforms.
There might be an implementation that has conditional coding for
those platforms. But shared memory is not part of standard C
and so is not really appropriate for comp.lang.c; you should ask
in OS-specific newsgroups.
--
"law -- it's a commodity"
-- Andrew Ryan (The Globe and Mail, 2005/11/26)
llothar wrote:
>
i need to manage a heap in shared memory. Does anybody know about
a portable (win32+mac+posi x) c implementation for this.
Simply use malloc. It is consistent over all C systems.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline.net
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Posted via a free Usenet account from http://www.teranews.com
CBFalconer <cb********@yah oo.comwrites:
llothar wrote:
>i need to manage a heap in shared memory. Does anybody know about
a portable (win32+mac+posi x) c implementation for this.
Simply use malloc. It is consistent over all C systems.
Yes, but it doesn't handle "shared memory", whatever that is.
<OT>Presumabl y it refers to memory that's shared between processes;
standard C has no such concept.</OT>
--
Keith Thompson (The_Other_Keit h) ks***@mib.org <http://www.ghoti.net/~kst>
San Diego Supercomputer Center <* <http://users.sdsc.edu/~kst>
"We must do something. This is something. Therefore, we must do this."
-- Antony Jay and Jonathan Lynn, "Yes Minister"
In article <46************ ***@yahoo.com>,
CBFalconer <cb********@mai neline.netwrote :
>i need to manage a heap in shared memory. Does anybody know about
a portable (win32+mac+posi x) c implementation for this.
>Simply use malloc. It is consistent over all C systems.
This is an unhelpful answer. malloc() knows nothing about shared
memory. As another poster pointed out, this can't be done in portable
C, but there may well be libraries with conditional code that work on
the systems in question.
Unix provides shared memory through the system V shm*() functions or
the more natural BSD mmap() function. No doubt win32 provides
something similar. To manage concurrent access to shared memory you
could use any of several synchronisation mechanisms, from atomic
test-and-set in shared memory to heavyweight semaphore system calls.
-- Richard
--
"Considerat ion shall be given to the need for as many as 32 characters
in some alphabets" - X3.4, 1963.
Keith Thompson wrote:
CBFalconer <cb********@yah oo.comwrites:
>llothar wrote:
>>i need to manage a heap in shared memory. Does anybody know
about a portable (win32+mac+posi x) c implementation for this.
Simply use malloc. It is consistent over all C systems.
Yes, but it doesn't handle "shared memory", whatever that is.
<OT>Presumabl y it refers to memory that's shared between
processes; standard C has no such concept.</OT>
However, it may do all that. You can also [OT] arrange a process
to manage the memory.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline.net
--
Posted via a free Usenet account from http://www.teranews.com
On 24 Apr 2007 08:00:28 -0700, llothar <ll*****@web.de wrote:
>i need to manage a heap in shared memory.
Does anybody know about a portable (win32+mac+posi x) c implementation
for this.
Maybe APR? http://apr.apache.org/docs/apr/1.2/group__apr__shm.html
--
Roland Pibinger
"The best software is simple, elegant, and full of drama" - Grady Booch
I believe that the win32 interface for shared memory is different
than the posix interface, so as best I know, there is no
implementation that is portable between those three platforms.
There might be an implementation that has conditional coding for
those platforms.
Of couse i mean conditional coding.
But shared memory is not part of standard C
and so is not really appropriate for comp.lang.c; you should ask
in OS-specific newsgroups.
Yes. But it is not offtopic here because for me everything that has
to do with plain programming in C belongs here.
And this includes questions about existing libraries for a problem as
in does in
all other comp.lang.xxx newsgroups.
llothar wrote:
>
>>But shared memory is not part of standard C
and so is not really appropriate for comp.lang.c; you should ask
in OS-specific newsgroups.
Yes. But it is not offtopic here because for me everything that has
to do with plain programming in C belongs here.
Shared memory libraries aren't "plain C", they are very platform specific.
And this includes questions about existing libraries for a problem as
in does in
all other comp.lang.xxx newsgroups.
No, it doesn't. You'd get the same response down the hall in the C++ group.
Apart form topicality, you will get better platform specific answers in
a platform specific group, so for your benefit, try those.
--
Ian Collins.
llothar wrote:
>
.... snip ...
>
Yes. But it is not offtopic here because for me everything that
has to do with plain programming in C belongs here.
And this includes questions about existing libraries for a problem
as in does in all other comp.lang.xxx newsgroups.
Yes, it is off-topic here, because the content and implementation
of those other libraries is not presented, or is not in standard C.
--
<http://www.cs.auckland .ac.nz/~pgut001/pubs/vista_cost.txt>
<http://www.securityfoc us.com/columnists/423>
<http://www.aaxnet.com/editor/edit043.html>
cbfalconer at maineline.net
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