| /* Definitions for thread-local data handling. Hurd version. |
| Copyright (C) 2003-2014 Free Software Foundation, Inc. |
| This file is part of the GNU C Library. |
| |
| The GNU C Library is free software; you can redistribute it and/or |
| modify it under the terms of the GNU Lesser General Public |
| License as published by the Free Software Foundation; either |
| version 2.1 of the License, or (at your option) any later version. |
| |
| The GNU C Library is distributed in the hope that it will be useful, |
| but WITHOUT ANY WARRANTY; without even the implied warranty of |
| MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| Lesser General Public License for more details. |
| |
| You should have received a copy of the GNU Lesser General Public |
| License along with the GNU C Library; if not, see |
| <http://www.gnu.org/licenses/>. */ |
| |
| #ifndef _TLS_H |
| #define _TLS_H |
| |
| #ifndef __ASSEMBLER__ |
| |
| # include <stddef.h> |
| # include <stdbool.h> |
| # include <mach/mig_errors.h> |
| # include <mach.h> |
| |
| |
| /* Type for the dtv. */ |
| typedef union dtv |
| { |
| size_t counter; |
| struct |
| { |
| void *val; |
| bool is_static; |
| } pointer; |
| } dtv_t; |
| |
| |
| /* Type of the TCB. */ |
| typedef struct |
| { |
| void *tcb; /* Points to this structure. */ |
| dtv_t *dtv; /* Vector of pointers to TLS data. */ |
| thread_t self; /* This thread's control port. */ |
| } tcbhead_t; |
| |
| |
| /* This is the size of the initial TCB. */ |
| # define TLS_INIT_TCB_SIZE sizeof (tcbhead_t) |
| |
| /* Alignment requirements for the initial TCB. */ |
| # define TLS_INIT_TCB_ALIGN __alignof__ (tcbhead_t) |
| |
| /* This is the size of the TCB. */ |
| # define TLS_TCB_SIZE TLS_INIT_TCB_SIZE /* XXX */ |
| |
| /* Alignment requirements for the TCB. */ |
| # define TLS_TCB_ALIGN TLS_INIT_TCB_ALIGN /* XXX */ |
| |
| |
| /* Install the dtv pointer. The pointer passed is to the element with |
| index -1 which contain the length. */ |
| # define INSTALL_DTV(descr, dtvp) \ |
| ((tcbhead_t *) (descr))->dtv = (dtvp) + 1 |
| |
| /* Return dtv of given thread descriptor. */ |
| # define GET_DTV(descr) \ |
| (((tcbhead_t *) (descr))->dtv) |
| |
| #endif /* !ASSEMBLER */ |
| |
| |
| #endif /* tls.h */ |
