/* Definition for thread-local data handling. NPTL/Alpha version. Copyright (C) 2003, 2005 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, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ #ifndef _TLS_H #define _TLS_H 1 #ifndef __ASSEMBLER__ # include <stdbool.h> # include <stddef.h> # include <stdint.h> /* Type for the dtv. */ typedef union dtv { size_t counter; struct { void *val; bool is_static; } pointer; } dtv_t; #else /* __ASSEMBLER__ */ # include <tcb-offsets.h> #endif /* __ASSEMBLER__ */ /* We require TLS support in the tools. */ #ifndef HAVE_TLS_SUPPORT # error "TLS support is required." #endif /* Signal that TLS support is available. */ # define USE_TLS 1 #ifndef __ASSEMBLER__ /* Get system call information. */ # include <sysdep.h> /* The TP points to the start of the thread blocks. */ # define TLS_DTV_AT_TP 1 /* Get the thread descriptor definition. */ # include <nptl/descr.h> typedef struct { dtv_t *dtv; void *private; } 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 16 /* This is the size of the TCB. */ # define TLS_TCB_SIZE sizeof (tcbhead_t) /* This is the size we need before TCB. */ # define TLS_PRE_TCB_SIZE sizeof (struct pthread) /* Alignment requirements for the TCB. */ # define TLS_TCB_ALIGN 16 /* Install the dtv pointer. The pointer passed is to the element with index -1 which contain the length. */ # define INSTALL_DTV(tcbp, dtvp) \ (((tcbhead_t *) (tcbp))->dtv = (dtvp) + 1) /* Install new dtv for current thread. */ # define INSTALL_NEW_DTV(dtv) \ (THREAD_DTV() = (dtv)) /* Return dtv of given thread descriptor. */ # define GET_DTV(tcbp) \ (((tcbhead_t *) (tcbp))->dtv) /* Code to initially initialize the thread pointer. This might need special attention since 'errno' is not yet available and if the operation can cause a failure 'errno' must not be touched. */ # define TLS_INIT_TP(tcbp, secondcall) \ (__builtin_set_thread_pointer ((void *)(tcbp)), NULL) /* Return the address of the dtv for the current thread. */ # define THREAD_DTV() \ (((tcbhead_t *) __builtin_thread_pointer ())->dtv) /* Return the thread descriptor for the current thread. */ # define THREAD_SELF \ ((struct pthread *)__builtin_thread_pointer () - 1) /* Magic for libthread_db to know how to do THREAD_SELF. */ # define DB_THREAD_SELF \ REGISTER (64, 64, 32 * 8, -sizeof (struct pthread)) /* Access to data in the thread descriptor is easy. */ #define THREAD_GETMEM(descr, member) \ descr->member #define THREAD_GETMEM_NC(descr, member, idx) \ descr->member[idx] #define THREAD_SETMEM(descr, member, value) \ descr->member = (value) #define THREAD_SETMEM_NC(descr, member, idx, value) \ descr->member[idx] = (value) #endif /* __ASSEMBLER__ */ #endif /* tls.h */