projects / thirdparty / glibc.git / blame
| Commit | Line | Data |
|---|---|---|
| 8321ef15 | 1 | /* Definitions for thread-local data handling. Hurd version. |
| 2b778ceb | 2 | Copyright (C) 2003-2021 Free Software Foundation, Inc. |
| 8321ef15 RM |
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 | |
| 59ba27a6 | 16 | License along with the GNU C Library; if not, see |
| 5a82c748 | 17 | <https://www.gnu.org/licenses/>. */ |
| 8321ef15 RM |
18 | |
| 19 | #ifndef _TLS_H | |
| 20 | #define _TLS_H | |
| 21 | ||
| 83cd1420 | 22 | #ifndef __ASSEMBLER__ |
| b0104b6f RM |
23 | |
| 24 | # include <stddef.h> | |
| 4fc81a77 | 25 | # include <stdint.h> |
| 69553a9b | 26 | # include <stdbool.h> |
| 4fc81a77 | 27 | # include <sysdep.h> |
| b0104b6f RM |
28 | # include <mach/mig_errors.h> |
| 29 | # include <mach.h> | |
| a5df0318 | 30 | # include <atomic.h> |
| b0104b6f | 31 | |
| 8321ef15 | 32 | |
| 8321ef15 RM |
33 | /* This is the size of the initial TCB. */ |
| 34 | # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) | |
| 35 | ||
| 36 | /* Alignment requirements for the initial TCB. */ | |
| 37 | # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) | |
| 38 | ||
| 39 | /* This is the size of the TCB. */ | |
| 40 | # define TLS_TCB_SIZE TLS_INIT_TCB_SIZE /* XXX */ | |
| 41 | ||
| 42 | /* Alignment requirements for the TCB. */ | |
| 43 | # define TLS_TCB_ALIGN TLS_INIT_TCB_ALIGN /* XXX */ | |
| 44 | ||
| b0104b6f RM |
45 | |
| 46 | /* Install the dtv pointer. The pointer passed is to the element with | |
| 47 | index -1 which contain the length. */ | |
| 48 | # define INSTALL_DTV(descr, dtvp) \ | |
| 49 | ((tcbhead_t *) (descr))->dtv = (dtvp) + 1 | |
| 50 | ||
| 51 | /* Return dtv of given thread descriptor. */ | |
| 52 | # define GET_DTV(descr) \ | |
| 53 | (((tcbhead_t *) (descr))->dtv) | |
| 54 | ||
| a5df0318 ST |
55 | /* Global scope switch support. */ |
| 56 | #define THREAD_GSCOPE_IN_TCB 0 | |
| 57 | #define THREAD_GSCOPE_GLOBAL | |
| 58 | #define THREAD_GSCOPE_SET_FLAG() \ | |
| 59 | atomic_exchange_and_add_acq (&GL(dl_thread_gscope_count), 1) | |
| 60 | #define THREAD_GSCOPE_RESET_FLAG() \ | |
| 61 | do \ | |
| 62 | if (atomic_exchange_and_add_rel (&GL(dl_thread_gscope_count), -1) == 1) \ | |
| bec41242 | 63 | lll_wake (GL(dl_thread_gscope_count), 0); \ |
| a5df0318 ST |
64 | while (0) |
| 65 | #define THREAD_GSCOPE_WAIT() \ | |
| 66 | do \ | |
| 67 | { \ | |
| 68 | int count; \ | |
| 69 | atomic_write_barrier (); \ | |
| 70 | while ((count = GL(dl_thread_gscope_count))) \ | |
| bec41242 | 71 | lll_wait (GL(dl_thread_gscope_count), count, 0); \ |
| a5df0318 ST |
72 | } \ |
| 73 | while (0) | |
| 74 | ||
| 83cd1420 | 75 | #endif /* !ASSEMBLER */ |
| 8321ef15 | 76 | |
| b0104b6f | 77 | |
| 8321ef15 | 78 | #endif /* tls.h */ |