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I used these shell commands: ../glibc/scripts/update-copyrights $PWD/../gnulib/build-aux/update-copyright (cd ../glibc && git commit -am"[this commit message]") and then ignored the output, which consisted lines saying "FOO: warning: copyright statement not found" for each of 6694 files FOO. I then removed trailing white space from benchtests/bench-pthread-locks.c and iconvdata/tst-iconv-big5-hkscs-to-2ucs4.c, to work around this diagnostic from Savannah: remote: *** pre-commit check failed ... remote: *** error: lines with trailing whitespace found remote: error: hook declined to update refs/heads/master
160 lines
5.2 KiB
C
160 lines
5.2 KiB
C
/* Definition for thread-local data handling. NPTL/m68k version.
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Copyright (C) 2010-2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Maxim Kuvyrkov <maxim@codesourcery.com>, 2010.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library. If not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _TLS_H
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#define _TLS_H 1
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#include <dl-sysdep.h>
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#ifndef __ASSEMBLER__
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# include <stdbool.h>
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# include <stddef.h>
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# include <stdint.h>
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# include <dl-dtv.h>
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#else /* __ASSEMBLER__ */
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# include <tcb-offsets.h>
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#endif /* __ASSEMBLER__ */
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#ifndef __ASSEMBLER__
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/* Get system call information. */
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# include <sysdep.h>
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/* The TP points to the start of the thread blocks. */
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# define TLS_DTV_AT_TP 1
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# define TLS_TCB_AT_TP 0
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/* Get the thread descriptor definition. */
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# include <nptl/descr.h>
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typedef struct
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{
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dtv_t *dtv;
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void *private;
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} tcbhead_t;
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/* This is the size of the initial TCB. Because our TCB is before the thread
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pointer, we don't need this. */
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# define TLS_INIT_TCB_SIZE 0
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/* Alignment requirements for the initial TCB. */
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# define TLS_INIT_TCB_ALIGN __alignof__ (struct pthread)
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/* This is the size of the TCB. Because our TCB is before the thread
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pointer, we don't need this. */
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# define TLS_TCB_SIZE 0
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/* Alignment requirements for the TCB. */
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# define TLS_TCB_ALIGN __alignof__ (struct pthread)
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/* This is the size we need before TCB - actually, it includes the TCB. */
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# define TLS_PRE_TCB_SIZE \
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(sizeof (struct pthread) \
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+ ((sizeof (tcbhead_t) + TLS_TCB_ALIGN - 1) & ~(TLS_TCB_ALIGN - 1)))
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/* The thread pointer (TP) points to the end of the
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TCB + 0x7000, as for PowerPC and MIPS. This implies that TCB address is
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TP - 0x7000. As we define TLS_DTV_AT_TP we can
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assume that the pthread struct is allocated immediately ahead of the
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TCB. This implies that the pthread_descr address is
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TP - (TLS_PRE_TCB_SIZE + 0x7000). */
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# define TLS_TCB_OFFSET 0x7000
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/* Install the dtv pointer. The pointer passed is to the element with
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index -1 which contain the length. */
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# define INSTALL_DTV(tcbp, dtvp) \
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((tcbhead_t *) (tcbp))[-1].dtv = dtvp + 1
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/* Install new dtv for current thread. */
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# define INSTALL_NEW_DTV(dtv) \
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(THREAD_DTV () = (dtv))
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/* Return dtv of given thread descriptor. */
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# define GET_DTV(tcbp) \
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(((tcbhead_t *) (tcbp))[-1].dtv)
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/* Code to initially initialize the thread pointer. This might need
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special attention since 'errno' is not yet available and if the
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operation can cause a failure 'errno' must not be touched. */
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# define TLS_INIT_TP(tcbp) \
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({ \
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int _sys_result; \
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\
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_sys_result = INTERNAL_SYSCALL_CALL (set_thread_area, \
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((void *) (tcbp)) + TLS_TCB_OFFSET); \
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INTERNAL_SYSCALL_ERROR_P (_sys_result) ? "unknown error" : NULL; })
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# define TLS_DEFINE_INIT_TP(tp, pd) \
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void *tp = (void *) (pd) + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE
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extern void * __m68k_read_tp (void);
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/* Return the address of the dtv for the current thread. */
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# define THREAD_DTV() \
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(((tcbhead_t *) (__m68k_read_tp () - TLS_TCB_OFFSET))[-1].dtv)
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/* Return the thread descriptor for the current thread. */
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# define THREAD_SELF \
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((struct pthread *) (__m68k_read_tp () - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE))
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/* Magic for libthread_db to know how to do THREAD_SELF. */
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# define DB_THREAD_SELF \
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CONST_THREAD_AREA (32, TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
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/* Access to data in the thread descriptor is easy. */
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# define THREAD_GETMEM(descr, member) \
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descr->member
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# define THREAD_GETMEM_NC(descr, member, idx) \
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descr->member[idx]
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# define THREAD_SETMEM(descr, member, value) \
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descr->member = (value)
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# define THREAD_SETMEM_NC(descr, member, idx, value) \
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descr->member[idx] = (value)
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/* l_tls_offset == 0 is perfectly valid on M68K, so we have to use some
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different value to mean unset l_tls_offset. */
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# define NO_TLS_OFFSET -1
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/* Get and set the global scope generation counter in struct pthread. */
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#define THREAD_GSCOPE_IN_TCB 1
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#define THREAD_GSCOPE_FLAG_UNUSED 0
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#define THREAD_GSCOPE_FLAG_USED 1
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#define THREAD_GSCOPE_FLAG_WAIT 2
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#define THREAD_GSCOPE_RESET_FLAG() \
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do \
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{ int __res \
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= atomic_exchange_rel (&THREAD_SELF->header.gscope_flag, \
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THREAD_GSCOPE_FLAG_UNUSED); \
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if (__res == THREAD_GSCOPE_FLAG_WAIT) \
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lll_futex_wake (&THREAD_SELF->header.gscope_flag, 1, LLL_PRIVATE); \
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} \
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while (0)
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#define THREAD_GSCOPE_SET_FLAG() \
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do \
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{ \
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THREAD_SELF->header.gscope_flag = THREAD_GSCOPE_FLAG_USED; \
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atomic_write_barrier (); \
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} \
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while (0)
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#endif /* __ASSEMBLER__ */
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#endif /* tls.h */
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