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Update.
2002-11-28 Ulrich Drepper <drepper@redhat.com> * sysdeps/unix/sysv/linux/x86_64/pthread_once.S: New file. * sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: New file. * sysdeps/unix/sysv/linux/x86_64/pt-vfork.S: New file.
This commit is contained in:
Ulrich Drepper
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commit
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@ -1,3 +1,11 @@
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2002-11-28 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/unix/sysv/linux/x86_64/pthread_once.S: New file.
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* sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h: New file.
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* sysdeps/unix/sysv/linux/x86_64/pt-vfork.S: New file.
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2002-11-27 Ulrich Drepper <drepper@redhat.com>
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* sysdeps/x86_64/bits/atomic.h: New file.
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151
nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h
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151
nptl/sysdeps/unix/sysv/linux/x86_64/bits/pthreadtypes.h
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/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef _BITS_PTHREADTYPES_H
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#define _BITS_PTHREADTYPES_H 1
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#define __SIZEOF_PTHREAD_ATTR_T 56
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#define __SIZEOF_PTHREAD_MUTEX_T 40
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#define __SIZEOF_PTHREAD_MUTEXATTR_T 4
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#define __SIZEOF_PTHREAD_COND_T 24
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#define __SIZEOF_PTHREAD_CONDATTR_T 4
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#define __SIZEOF_PTHREAD_RWLOCK_T 56
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#define __SIZEOF_PTHREAD_RWLOCKATTR_T 8
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#define __SIZEOF_PTHREAD_BARRIER_T 32
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#define __SIZEOF_PTHREAD_BARRIERATTR_T 4
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/* Thread identifiers. The structure of the attribute type is not
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exposed on purpose. */
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typedef unsigned long int pthread_t;
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_ATTR_T];
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long int __align;
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} pthread_attr_t;
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/* Data structures for mutex handling. The structure of the attribute
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type is not exposed on purpose. */
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typedef union
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{
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struct
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{
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int __lock;
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unsigned int __count;
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struct pthread *__owner;
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/* KIND must stay at this position in the structure to maintain
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binary compatibility. */
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int __kind;
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} __data;
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char __size[__SIZEOF_PTHREAD_MUTEX_T];
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long int __align;
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} pthread_mutex_t;
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_MUTEXATTR_T];
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long int __align;
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} pthread_mutexattr_t;
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/* Data structure for conditional variable handling. The structure of
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the attribute type is not exposed on purpose. */
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typedef union
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{
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struct
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{
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int __lock;
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unsigned int __nr_wakers;
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unsigned int __nr_sleepers;
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} __data;
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char __size[__SIZEOF_PTHREAD_COND_T];
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long int __align;
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} pthread_cond_t;
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_CONDATTR_T];
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long int __align;
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} pthread_condattr_t;
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/* Keys for thread-specific data */
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typedef unsigned int pthread_key_t;
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/* Once-only execution */
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typedef int pthread_once_t;
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#ifdef __USE_UNIX98
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/* Data structure for read-write lock variable handling. The
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structure of the attribute type is not exposed on purpose. */
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typedef union
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{
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struct
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{
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int __lock;
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unsigned int __nr_readers;
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unsigned int __readers_wakeup;
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unsigned int __writer_wakeup;
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unsigned int __nr_readers_queued;
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unsigned int __nr_writers_queued;
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pthread_t __writer;
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unsigned long int __unused;
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/* FLAGS must stay at this position in the structure to maintain
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binary compatibility. */
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unsigned int __flags;
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} __data;
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char __size[__SIZEOF_PTHREAD_RWLOCK_T];
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long int __align;
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} pthread_rwlock_t;
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_RWLOCKATTR_T];
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long int __align;
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} pthread_rwlockattr_t;
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#endif
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#ifdef __USE_XOPEN2K
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/* POSIX spinlock data type. */
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typedef volatile int pthread_spinlock_t;
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/* POSIX barriers data type. The structure of the type is
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deliberately not exposed. */
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_BARRIER_T];
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long int __align;
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} pthread_barrier_t;
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typedef union
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{
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char __size[__SIZEOF_PTHREAD_BARRIERATTR_T];
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int __align;
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} pthread_barrierattr_t;
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#endif
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#endif /* bits/pthreadtypes.h */
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1
nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S
Normal file
1
nptl/sysdeps/unix/sysv/linux/x86_64/pt-vfork.S
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@ -0,0 +1 @@
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#include <sysdeps/unix/sysv/linux/x86_64/vfork.S>
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138
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S
Normal file
138
nptl/sysdeps/unix/sysv/linux/x86_64/pthread_once.S
Normal file
@ -0,0 +1,138 @@
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/* Copyright (C) 2002 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
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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, write to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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02111-1307 USA. */
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#ifndef UP
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# define LOCK lock
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#else
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# define LOCK
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#endif
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#define SYS_futex 202
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#define FUTEX_WAKE 1
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.comm __fork_generation, 4, 4
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.text
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.globl __pthread_once
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.type __pthread_once,@function
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.align 16
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__pthread_once:
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testl $2, (%rdi)
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jz 1f
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xorl %eax, %eax
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0: ret
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1: xorq %rsi, %rsi
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/* Not yet initialized or initialization in progress.
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Get the fork generation counter now. */
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6: movl (%rdi), %eax
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5: movq %rax, %rdx
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testl $2, %eax
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jnz 0b
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andl $3, %edx
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orl __fork_generation(%rip), %edx
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orl $1, %edx
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LOCK
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cmpxchgl %edx, (%rdi)
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jnz 5b
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/* Check whether another thread already runs the initializer. */
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testl $1, %eax
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jz 3f /* No -> do it. */
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/* Check whether the initializer execution was interrupted
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by a fork. */
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xorl %edx, %eax
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testl $0xfffffffc, %eax
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jnz 3f /* Different for generation -> run initializer. */
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/* Somebody else got here first. Wait. */
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movq %rsi, %rcx /* movl $FUTEX_WAIT, %ecx */
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movl $SYS_futex, %eax
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syscall
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jmp 6b
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/* Preserve the pointer to the control variable. */
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3: pushq %rdi
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/* Call the initializer function after setting up the
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cancellation handler. */
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subq $32, %rsp
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/* Push the cleanup handler. */
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leaq clear_once_control(%rip), %rsi
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movq %rdi, %rdx
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movq %rsp, %rdi
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call _GI_pthread_cleanup_push /* Note: no @PLT. */
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movq 48(%rsp), %rax
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call *%rax
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/* Pop the cleanup handler. This code depends on the once
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handler and _pthread_cleanup_push not touch the content
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of the stack. Otherwise the first parameter would have
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to be reloaded. */
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xorq %rdi, %rdi
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call _GI_pthread_cleanup_pop /* Note: no @PLT. */
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addq $32, %rsp
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/* Get the control variable address back. */
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popq %rdi
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/* Sucessful run of the initializer. Signal that we are done. */
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LOCK
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incl (%rdi)
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/* Wake up all other threads. */
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movl $0x7fffffff, %edx
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movl $FUTEX_WAKE, %esi
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xorq %rcx, %rcx
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movl $SYS_futex, %eax
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syscall
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4: xorq %rax, %rax
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ret
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.size __pthread_once,.-__pthread_once
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.globl pthread_once
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pthread_once = __pthread_once
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.type clear_once_control,@function
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.align 16
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clear_once_control:
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movl $0, (%rdi)
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xorq %rcx, %rcx
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movl $0x7fffffff, %edx
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movl $FUTEX_WAKE, %esi
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movl $SYS_futex, %eax
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syscall
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ret
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.size clear_once_control,.-clear_once_control
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