I don't really understand why you cannot define your own tls_callbacks_a to do
what you want. Incorporate it in your code, and the one from snn.lib will not be
linked in.
On 1/19/2012 11:53 PM, Alex wrote:
The way I see it, we can do three things:
a) Do something similar to what mingw is doing:
http://mingw-w64.svn.sourceforge.net/viewvc/mingw-w64/trunk/mingw-w64-crt/crt/tlssup.c?revision=4739&view=markup
(line 44 to 57). This is problematic because we're going to need a
pragma in D to place data in the right place.
b) Use a callback registration mechanism. That is, snn.lib defines a
global handler that it emits to _tls_used. When this handler is
called, it will enumerate and call all registered callbacks. So we
would need to expose two functions to register and deregister
callbacks.
c) The really dirty way: Add a linker flag that lets you overwrite the
symbol regardless of previous different definitions.
Any thoughts on what would be best?
Regards,
Alex
On Fri, Jan 20, 2012 at 3:00 AM, Walter Bright<[email protected]> wrote:
Here's the source code for it. If you can propose a change to it, I can
merge it in.
-----------------------------------------------------------------------------------------
/*_ tlsdata.c Tue Jan 24 1995 */
/* Copyright (C) 1995 by Digital Mars */
/* All Rights Reserved */
/* $Revision: 1.1.1.1 $ */
#if defined(_WIN32)
/************************************************************************
* This file contains the necessary declartions for __declspec(thread)
* support. The main work is done by the linker. The values in tls_used
* are fixed up into a special segment by the linker that NT will then
* fix up to FS:__tls_array for each thread.
* See file tlsseg.asm for other declarations.
*/
extern long _tlsstart;
extern long _tlsend;
unsigned _tls_index = 0; /* index referred to by compiler */
void *_tls_callbacks_a[1] = { 0 };
struct {
void *tlsstart; /* contains address of start of tls segment (Raw Data
Start VA) */
void *tlsend; /* contains address of end of tls segment */
void *tlsindex; /* contains address of index into tls segment */
void *tlscallbacks; /* Pointer to an array of TLS callback functions
The array is null-terminated, so if there
is no callback function support, this field
points to four bytes set to 0. The prototype
for these functions is the same as DLL-Entry.
These are most useful for declspec(thread) tagged
objects which need to be constructed and
destructed
for each thread that attaches.
*/
long zerofill; /* The size in bytes of hte template beyond the
initialized data defined by tlsstart
and tlsend. The total template
size should be the same as the total size of TLS
data in the image file. The zero fill is the amount
of data that comes after the initialized non-zero
data
The linker fills this in at link time.
*/
long characteristics; /* Reserved, currently not used */
} _tls_used = {
&_tlsstart,
&_tlsend,
&_tls_index,
&_tls_callbacks_a[0],
0,
0
};
#endif
_______________________________________________
dmd-internals mailing list
[email protected]
http://lists.puremagic.com/mailman/listinfo/dmd-internals
_______________________________________________
dmd-internals mailing list
[email protected]
http://lists.puremagic.com/mailman/listinfo/dmd-internals
_______________________________________________
dmd-internals mailing list
[email protected]
http://lists.puremagic.com/mailman/listinfo/dmd-internals
