[Mingw-users] Re: __declspec(allocate("myshare"))

[Samuel B. <sam...@ur...>]

Success! The GCC manual describes the following windows-specific feature on:
http://gcc.gnu.org/onlinedocs/gcc-3.3.2/gcc/Variable-Attributes.html.
Defining

int foobar __attribute__((section ("fooshare"), shared)) = 42;

like that, the same value is shared by all instances of my DLL, no matter in
which process context the module is run. Luke, thank you very much.

Samuel

> Try looking in the GCC manual for __attribute__((shared)) and also search
> this mailing list for examples.
>
> Luke

> > in a hook procedure called back by the system - in the context of the
> > process that raised the respective event, however - I need to access
> > values stored in the context of my own process. Someone advised me
> > to use the following construction:
> >
> > #pragma data_seg("fooshare")
> > __declspec(allocate("fooshare")) int foobar = 42;
> > #pragma data_seg()
> > #pragma comment(linker, "/SECTION:fooshare,RWS")
> >
> > With Visual C++ this works fine, with MinGW it does not. In fact, it's
> > Microsoft specific. MinGW just warns me that it ignores 'allocate', and
my
> > process and the hooked process see different values. Can anybody give a
> > hint, please?