1 /* Generic declarations for DTV-based TLS handling in the dynamic linker.
2    Copyright (C) 2002-2021 Free Software Foundation, Inc.
3    This file is part of the GNU C Library.
4 
5    The GNU C Library is free software; you can redistribute it and/or
6    modify it under the terms of the GNU Lesser General Public
7    License as published by the Free Software Foundation; either
8    version 2.1 of the License, or (at your option) any later version.
9 
10    The GNU C Library is distributed in the hope that it will be useful,
11    but WITHOUT ANY WARRANTY; without even the implied warranty of
12    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
13    Lesser General Public License for more details.
14 
15    You should have received a copy of the GNU Lesser General Public
16    License along with the GNU C Library; if not, see
17    <https://www.gnu.org/licenses/>.  */
18 
19 #ifndef _DL_DTV_H
20 #define _DL_DTV_H
21 
22 struct dtv_pointer
23 {
24   void *val;                    /* Pointer to data, or TLS_DTV_UNALLOCATED.  */
25   void *to_free;                /* Unaligned pointer, for deallocation.  */
26 };
27 
28 /* Type for the dtv.  */
29 typedef union dtv
30 {
31   size_t counter;
32   struct dtv_pointer pointer;
33 } dtv_t;
34 
35 /* Value used for dtv entries for which the allocation is delayed.  */
36 #define TLS_DTV_UNALLOCATED ((void *) -1l)
37 
38 #endif /* _DLT_DTV_H */
39