On Thu, Jul 08, 2004 at 09:05:20AM +0800, [EMAIL PROTECTED] wrote:
>I want to share "1" bit between two same cygwin processes. I know I
>should use cygipc or cygserver formally. But I really want to run the
>system in a simple and standalone way. Is there any unused bit in
>cygwin internal structure I can use to share that bit?
If there was it would be a horrendously bad idea for you to use it.
Since it isn't documented, it would be subject to change and then where
would you be when you upgraded to a new version of cygwin?
>Or any other idea is welcome. Thanks.
Check the "info gcc" documentation and look for the "shared" attribute.
It probably does exactly what you want. I've extracted a section from
the documentation below.
cgf
`shared'
On Microsoft Windows, in addition to putting variable definitions
in a named section, the section can also be shared among all
running copies of an executable or DLL. For example, this small
program defines shared data by putting it in a named section
`shared' and marking the section shareable:
int foo __attribute__((section ("shared"), shared)) = 0;
int
main()
{
/* Read and write foo. All running
copies see the same value. */
return 0;
}
You may only use the `shared' attribute along with `section'
attribute with a fully initialized global definition because of
the way linkers work. See `section' attribute for more
information.
The `shared' attribute is only available on Microsoft Windows.
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