d57a3f0e02
2003-08-11 Carlos O'Donell <carlos@baldric.uwo.ca>
* dlfcn/default.c (main): Cast dlsym loaded value to same type as main.
Address passed to test_in_mod1 and test_in_mod2 without casting.
* dlfcn/defaultmod1.c: Change prototype of test_in_mod1.
(test_in_mod1): Cast dlsym loaded value to same type as mainp.
* dlfcn/defaultmod2.c: Change prototype of test_in_mod2.
(test_in_mod2): Cast dlsym loaded value to same type as mainp.
2003-08-15 Jakub Jelinek <jakub@redhat.com>
* sysdeps/sparc/sparc32/elf/configure.in (libc_cv_sparc32_tls):
Change quotes before using [].
* sysdeps/unix/sysv/linux/sparc/sys/user.h: New file.
* sysdeps/sparc/sparc32/bits/atomic.h (__sparc32_atomic_lock):
Renamed to...
(__sparc32_atomic_locks): ...this. Change into 64-byte array.
(__sparc32_atomic_do_lock, __sparc32_atomic_do_unlock): Add addr
argument. Select one of 64 locks from address bits.
(atomic_compare_and_exchange_val_acq,
atomic_compare_and_exchange_bool_acq): Pass memory address to
__sparc32_atomic_do_{,un}lock.
82 lines
3.1 KiB
C
82 lines
3.1 KiB
C
/* Atomic operations. sparc32 version.
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Copyright (C) 2003 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Jakub Jelinek <jakub@redhat.com>, 2003.
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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_ATOMIC_H
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#define _BITS_ATOMIC_H 1
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/* We have no compare and swap, just test and set.
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The following implementation contends on 64 global locks
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per library and assumes no variable will be accessed using atomic.h
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macros from two different libraries. */
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volatile unsigned char __sparc32_atomic_locks[64]
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__attribute__ ((nocommon, section (".gnu.linkonce.b.__sparc32_atomic_locks"),
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visibility ("hidden")));
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#define __sparc32_atomic_do_lock(addr) \
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do \
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{ \
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unsigned int __old_lock; \
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unsigned int __idx = (((long) addr >> 2) ^ ((long) addr >> 12)) \
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& 63; \
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do \
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__asm ("ldstub %1, %0" \
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: "=r" (__old_lock), \
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"=m" (__sparc32_atomic_locks[__idx]) \
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: "m" (__sparc32_atomic_locks[__idx])); \
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while (__old_lock); \
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} \
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while (0)
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#define __sparc32_atomic_do_unlock(addr) \
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do \
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__sparc32_atomic_locks[(((long) addr >> 2) \
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^ ((long) addr >> 12)) & 63] = 0; \
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while (0)
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/* The only basic operation needed is compare and exchange. */
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#define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
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({ __typeof (mem) __acev_memp = (mem); \
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__typeof (*mem) __acev_ret; \
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__typeof (*mem) __acev_newval = (newval); \
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\
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__sparc32_atomic_do_lock (__acev_memp); \
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__acev_ret = *__acev_memp; \
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if (__acev_ret == (oldval)) \
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*__acev_memp = __acev_newval; \
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__sparc32_atomic_do_unlock (__acev_memp); \
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__acev_ret; })
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#define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
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({ __typeof (mem) __aceb_memp = (mem); \
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int __aceb_ret; \
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__typeof (*mem) __aceb_newval = (newval); \
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\
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__sparc32_atomic_do_lock (__aceb_memp); \
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__aceb_ret = 0; \
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if (*__aceb_memp == (oldval)) \
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*__aceb_memp = __aceb_newval; \
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else \
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__aceb_ret = 1; \
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__sparc32_atomic_do_unlock (__aceb_memp); \
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__aceb_ret; })
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#endif /* bits/atomic.h */
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