799142bf74
libitm/ * beginend.cc (GTM::gtm_thread::begin_transaction): Add comment. (GTM::gtm_thread::try_commit): Changed memory order. * config/linux/alpha/futex_bits.h (sys_futex0): Take atomic int as parameter. * config/linux/x86/futex_bits.h (sys_futex0): Same. * config/linux/sh/futex_bits.h (sys_futex0): Same. * config/linux/futex_bits.h (sys_futex0): Same. * config/linux/futex.cc (futex_wait, futex_wake): Same. * config/linux/futex.h (futex_wait, futex_wake): Same. * config/linux/rwlock.h (gtm_rwlock::writers, gtm_rwlock::writer_readers, gtm_rwlock::readers): Change to atomic ints. * config/linux/rwlock.cc (gtm_rwlock::read_lock, gtm_rwlock::write_lock_generic, gtm_rwlock::read_unlock, gtm_rwlock::write_unlock): Fix memory orders and fences. * config/posix/rwlock.cc (gtm_rwlock::read_lock, gtm_rwlock::write_lock_generic, gtm_rwlock::read_unlock, gtm_rwlock::write_unlock): Same. * config/linux/rwlock.h (gtm_rwlock::summary): Change to atomic int. * method-gl.cc (gl_mg::init, gl_wt_dispatch::memtransfer_static, gl_wt_dispatch::memset_static, gl_wt_dispatch::begin_or_restart): Add comments. (gl_wt_dispatch::pre_write, gl_wt_dispatch::validate, gl_wt_dispatch::load, gl_wt_dispatch::store, gl_wt_dispatch::try_commit, gl_wt_dispatch::rollback): Fix memory orders and fences. Add comments. From-SVN: r182674
83 lines
2.1 KiB
C++
83 lines
2.1 KiB
C++
/* Copyright (C) 2008, 2009, 2011 Free Software Foundation, Inc.
|
|
Contributed by Richard Henderson <rth@redhat.com>.
|
|
|
|
This file is part of the GNU Transactional Memory Library (libitm).
|
|
|
|
Libitm is free software; you can redistribute it and/or modify it
|
|
under the terms of the GNU General Public License as published by
|
|
the Free Software Foundation; either version 3 of the License, or
|
|
(at your option) any later version.
|
|
|
|
Libitm 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 General Public License for
|
|
more details.
|
|
|
|
Under Section 7 of GPL version 3, you are granted additional
|
|
permissions described in the GCC Runtime Library Exception, version
|
|
3.1, as published by the Free Software Foundation.
|
|
|
|
You should have received a copy of the GNU General Public License and
|
|
a copy of the GCC Runtime Library Exception along with this program;
|
|
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifdef __x86_64__
|
|
# ifndef SYS_futex
|
|
# define SYS_futex 202
|
|
# endif
|
|
|
|
static inline long
|
|
sys_futex0 (std::atomic<int> *addr, long op, long val)
|
|
{
|
|
register long r10 __asm__("%r10") = 0;
|
|
long res;
|
|
|
|
__asm volatile ("syscall"
|
|
: "=a" (res)
|
|
: "0" (SYS_futex), "D" (addr), "S" (op), "d" (val), "r" (r10)
|
|
: "r11", "rcx", "memory");
|
|
|
|
return res;
|
|
}
|
|
|
|
#else
|
|
# ifndef SYS_futex
|
|
# define SYS_futex 240
|
|
# endif
|
|
|
|
# ifdef __PIC__
|
|
|
|
static inline long
|
|
sys_futex0 (std::atomic<int> *addr, int op, int val)
|
|
{
|
|
long res;
|
|
|
|
__asm volatile ("xchgl\t%%ebx, %2\n\t"
|
|
"int\t$0x80\n\t"
|
|
"xchgl\t%%ebx, %2"
|
|
: "=a" (res)
|
|
: "0"(SYS_futex), "r" (addr), "c"(op),
|
|
"d"(val), "S"(0)
|
|
: "memory");
|
|
return res;
|
|
}
|
|
|
|
# else
|
|
|
|
static inline long
|
|
sys_futex0 (std::atomic<int> *addr, int op, int val)
|
|
{
|
|
long res;
|
|
|
|
__asm volatile ("int $0x80"
|
|
: "=a" (res)
|
|
: "0"(SYS_futex), "b" (addr), "c"(op),
|
|
"d"(val), "S"(0)
|
|
: "memory");
|
|
return res;
|
|
}
|
|
|
|
# endif /* __PIC__ */
|
|
#endif /* __x86_64__ */
|