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2003-03-21  Ulrich Drepper  <drepper@redhat.com>

	* cancellation.c: Adjust for new form of compare&exchange macros.
	* cleanup_defer.c: Likewise.
	* init.c: Likewise.
	* libc-cancellation.c: Likewise.
	* old_pthread_cond_broadcast.c: Likewise.
	* old_pthread_cond_signal.c: Likewise.
	* old_pthread_cond_timedwait.c: Likewise.
	* old_pthread_cond_wait.c: Likewise.
	* pthread_cancel.c: Likewise.
	* pthread_create.c: Likewise.
	* pthread_detach.c: Likewise.
	* pthread_join.c: Likewise.
	* pthread_key_delete.c: Likewise.
	* pthread_setcancelstate.c: Likewise.
	* pthread_setcanceltype.c: Likewise.
	* pthread_timedjoin.c: Likewise.
	* pthread_tryjoin.c: Likewise.
	* sysdeps/pthread/createthread.c: Likewise.
This commit is contained in:
Ulrich Drepper 2003-03-21 08:03:25 +00:00
parent 18627f615b
commit 5a3ab2fc18
29 changed files with 172 additions and 148 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

4
gmon/mcount.c
View file

@ -69,8 +69,8 @@ _MCOUNT_DECL(frompc, selfpc) /* _mcount; may be static, inline, etc */
* check that we are profiling
* and that we aren't recursively invoked.
*/
if (atomic_compare_and_exchange_acq (&p->state, GMON_PROF_BUSY,
GMON_PROF_ON))
if (atomic_compare_and_exchange_bool_acq (&p->state, GMON_PROF_BUSY,
GMON_PROF_ON))
return;
/*

2
malloc/set-freeres.c
View file

@ -36,7 +36,7 @@ __libc_freeres (void)
protect for multiple executions since these are fatal. */
static long int already_called;
if (! atomic_compare_and_exchange_acq (&already_called, 1, 0))
if (! atomic_compare_and_exchange_bool_acq (&already_called, 1, 0))
{
void * const *p;

21
nptl/ChangeLog
View file

@ -1,3 +1,24 @@
2003-03-21 Ulrich Drepper <drepper@redhat.com>
* cancellation.c: Adjust for new form of compare&exchange macros.
* cleanup_defer.c: Likewise.
* init.c: Likewise.
* libc-cancellation.c: Likewise.
* old_pthread_cond_broadcast.c: Likewise.
* old_pthread_cond_signal.c: Likewise.
* old_pthread_cond_timedwait.c: Likewise.
* old_pthread_cond_wait.c: Likewise.
* pthread_cancel.c: Likewise.
* pthread_create.c: Likewise.
* pthread_detach.c: Likewise.
* pthread_join.c: Likewise.
* pthread_key_delete.c: Likewise.
* pthread_setcancelstate.c: Likewise.
* pthread_setcanceltype.c: Likewise.
* pthread_timedjoin.c: Likewise.
* pthread_tryjoin.c: Likewise.
* sysdeps/pthread/createthread.c: Likewise.
2003-03-20 Ulrich Drepper <drepper@redhat.com>
* sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Include <atomic.h>.

12
nptl/cancellation.c
View file

@ -41,8 +41,8 @@ __pthread_enable_asynccancel (void)
if (newval == oldval)
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
{
if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval))
{
@ -72,8 +72,8 @@ __pthread_enable_asynccancel_2 (int *oldvalp)
if (newval == oldval)
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
{
if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval))
{
@ -106,8 +106,8 @@ __pthread_disable_asynccancel (int oldtype)
if (newval == oldval)
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
break;
}
}

16
nptl/cleanup_defer.c
View file

@ -41,10 +41,10 @@ _pthread_cleanup_push_defer (buffer, routine, arg)
/* Disable asynchronous cancellation for now. */
if (__builtin_expect (cancelhandling & CANCELTYPE_BITMASK, 0))
{
while (atomic_compare_and_exchange_acq (&self->cancelhandling,
cancelhandling
& ~CANCELTYPE_BITMASK,
cancelhandling) != 0)
while (atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
cancelhandling
& ~CANCELTYPE_BITMASK,
cancelhandling))
cancelhandling = self->cancelhandling;
}
@ -70,10 +70,10 @@ _pthread_cleanup_pop_restore (buffer, execute)
&& ((cancelhandling = THREAD_GETMEM (self, cancelhandling))
& CANCELTYPE_BITMASK) == 0)
{
while (atomic_compare_and_exchange_acq (&self->cancelhandling,
cancelhandling
| CANCELTYPE_BITMASK,
cancelhandling) != 0)
while (atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
cancelhandling
| CANCELTYPE_BITMASK,
cancelhandling))
cancelhandling = self->cancelhandling;
CANCELLATION_P (self);

4
nptl/init.c
View file

@ -147,8 +147,8 @@ sigcancel_handler (int sig __attribute ((unused)))
/* Already canceled or exiting. */
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
{
/* Set the return value. */
THREAD_SETMEM (self, result, PTHREAD_CANCELED);

29
nptl/libc-cancellation.c
View file

@ -34,11 +34,12 @@ __libc_enable_asynccancel (void)
{
struct pthread *self = THREAD_SELF;
int oldval;
int newval;
while (1)
do
{
oldval = THREAD_GETMEM (self, cancelhandling);
int newval = oldval | CANCELTYPE_BITMASK;
newval = oldval | CANCELTYPE_BITMASK;
if (__builtin_expect ((oldval & CANCELED_BITMASK) != 0, 0))
{
@ -46,8 +47,8 @@ __libc_enable_asynccancel (void)
if ((oldval & EXITING_BITMASK) != 0)
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) != 0)
if (atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
/* Somebody else modified the word, try again. */
continue;
@ -60,11 +61,9 @@ __libc_enable_asynccancel (void)
/* NOTREACHED */
}
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
break;
}
while (atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval));
return oldval;
}
@ -80,19 +79,19 @@ __libc_disable_asynccancel (int oldtype)
return;
struct pthread *self = THREAD_SELF;
int oldval;
int newval;
while (1)
do
{
int oldval = THREAD_GETMEM (self, cancelhandling);
int newval = oldval & ~CANCELTYPE_BITMASK;
oldval = THREAD_GETMEM (self, cancelhandling);
newval = oldval & ~CANCELTYPE_BITMASK;
if (newval == oldval)
break;
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
break;
}
while (atomic_compare_and_exchange_bool_acq (&self->cancelhandling, newval,
oldval));
}
#endif

2
nptl/old_pthread_cond_broadcast.c
View file

@ -46,7 +46,7 @@ __pthread_cond_broadcast_2_0 (cond)
(void) pthread_cond_init (newcond, NULL);
#endif
if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
/* Somebody else just initialized the condvar. */
free (newcond);
}

2
nptl/old_pthread_cond_signal.c
View file

@ -46,7 +46,7 @@ __pthread_cond_signal_2_0 (cond)
(void) pthread_cond_init (newcond, NULL);
#endif
if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
/* Somebody else just initialized the condvar. */
free (newcond);
}

2
nptl/old_pthread_cond_timedwait.c
View file

@ -48,7 +48,7 @@ __pthread_cond_timedwait_2_0 (cond, mutex, abstime)
(void) pthread_cond_init (newcond, NULL);
#endif
if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
/* Somebody else just initialized the condvar. */
free (newcond);
}

2
nptl/old_pthread_cond_wait.c
View file

@ -47,7 +47,7 @@ __pthread_cond_wait_2_0 (cond, mutex)
(void) pthread_cond_init (newcond, NULL);
#endif
if (atomic_compare_and_exchange_acq (&cond->cond, newcond, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&cond->cond, newcond, NULL))
/* Somebody else just initialized the condvar. */
free (newcond);
}

18
nptl/pthread_cancel.c
View file

@ -36,10 +36,12 @@ pthread_cancel (th)
return ESRCH;
int result = 0;
while (1)
int oldval;
int newval;
do
{
int oldval = pd->cancelhandling;
int newval = oldval | CANCELING_BITMASK | CANCELED_BITMASK;
oldval = pd->cancelhandling;
newval = oldval | CANCELING_BITMASK | CANCELED_BITMASK;
/* Avoid doing unnecessary work. The atomic operation can
potentially be expensive if the bug has to be locked and
@ -66,13 +68,11 @@ pthread_cancel (th)
break;
}
/* Mark the thread as canceled. This has to be done
atomically since other bits could be modified as well. */
if (atomic_compare_and_exchange_acq (&pd->cancelhandling, newval,
oldval) == 0)
break;
}
/* Mark the thread as canceled. This has to be done
atomically since other bits could be modified as well. */
while (atomic_compare_and_exchange_bool_acq (&pd->cancelhandling, newval,
oldval));
return result;
}

4
nptl/pthread_create.c
View file

@ -260,8 +260,8 @@ start_thread (void *arg)
do
pd->nextevent = __nptl_last_event;
while (atomic_compare_and_exchange_acq (&__nptl_last_event, pd,
pd->nextevent) != 0);
while (atomic_compare_and_exchange_bool_acq (&__nptl_last_event,
pd, pd->nextevent));
}
/* Now call the function to signal the event. */

2
nptl/pthread_detach.c
View file

@ -36,7 +36,7 @@ pthread_detach (th)
int result = 0;
/* Mark the thread as detached. */
if (atomic_compare_and_exchange_acq (&pd->joinid, pd, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&pd->joinid, pd, NULL))
{
/* There are two possibilities here. First, the thread might
already be detached. In this case we return EINVAL.

5
nptl/pthread_join.c
View file

@ -66,8 +66,9 @@ pthread_join (threadid, thread_return)
/* Wait for the thread to finish. If it is already locked something
is wrong. There can only be one waiter. */
if (__builtin_expect (atomic_compare_and_exchange_acq (&pd->joinid, self,
NULL) != 0, 0))
if (__builtin_expect (atomic_compare_and_exchange_bool_acq (&pd->joinid,
self,
NULL), 0))
/* There is already somebody waiting for the thread. */
return EINVAL;

6
nptl/pthread_key_delete.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -33,8 +33,8 @@ pthread_key_delete (key)
unsigned int seq = __pthread_keys[key].seq;
if (__builtin_expect (! KEY_UNUSED (seq), 1)
&& atomic_compare_and_exchange_acq (&__pthread_keys[key].seq,
seq + 1, seq) == 0)
&& ! atomic_compare_and_exchange_bool_acq (&__pthread_keys[key].seq,
seq + 1, seq))
/* We deleted a valid key. */
result = 0;
}

6
nptl/pthread_setcancelstate.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -54,8 +54,8 @@ __pthread_setcancelstate (state, oldstate)
/* Update the cancel handling word. This has to be done
atomically since other bits could be modified as well. */
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
{
if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval))
__do_cancel ();

6
nptl/pthread_setcanceltype.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -54,8 +54,8 @@ __pthread_setcanceltype (type, oldtype)
/* Update the cancel handling word. This has to be done
atomically since other bits could be modified as well. */
if (atomic_compare_and_exchange_acq (&self->cancelhandling, newval,
oldval) == 0)
if (! atomic_compare_and_exchange_bool_acq (&self->cancelhandling,
newval, oldval))
{
if (CANCEL_ENABLED_AND_CANCELED_AND_ASYNCHRONOUS (newval))
{

4
nptl/pthread_timedjoin.c
View file

@ -63,8 +63,8 @@ pthread_timedjoin_np (threadid, thread_return, abstime)
/* Wait for the thread to finish. If it is already locked something
is wrong. There can only be one waiter. */
if (__builtin_expect (atomic_compare_and_exchange_acq (&pd->joinid, self,
NULL) != 0, 0))
if (__builtin_expect (atomic_compare_and_exchange_bool_acq (&pd->joinid,
self, NULL), 0))
/* There is already somebody waiting for the thread. */
return EINVAL;

4
nptl/pthread_tryjoin.c
View file

@ -1,4 +1,4 @@
/* Copyright (C) 2002 Free Software Foundation, Inc.
/* Copyright (C) 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
Contributed by Ulrich Drepper <drepper@redhat.com>, 2002.
@ -59,7 +59,7 @@ pthread_tryjoin_np (threadid, thread_return)
/* Wait for the thread to finish. If it is already locked something
is wrong. There can only be one waiter. */
if (atomic_compare_and_exchange_acq (&pd->joinid, self, NULL) != 0)
if (atomic_compare_and_exchange_bool_acq (&pd->joinid, self, NULL))
/* There is already somebody waiting for the thread. */
return EINVAL;

4
nptl/sysdeps/pthread/createthread.c
View file

@ -100,8 +100,8 @@ create_thread (struct pthread *pd, STACK_VARIABLES_PARMS)
/* Enqueue the descriptor. */
do
pd->nextevent = __nptl_last_event;
while (atomic_compare_and_exchange_acq (&__nptl_last_event, pd,
pd->nextevent) != 0);
while (atomic_compare_and_exchange_bool_acq (&__nptl_last_event, pd,
pd->nextevent) != 0);
/* Now call the function which signals the event. */
__nptl_create_event ();

4
nscd/cache.c
View file

@ -101,8 +101,8 @@ cache_add (int type, void *key, size_t len, const void *packet, size_t total,
/* Put the new entry in the first position. */
do
newp->next = table->array[hash];
while (atomic_compare_and_exchange_acq (&table->array[hash], newp,
newp->next));
while (atomic_compare_and_exchange_bool_acq (&table->array[hash], newp,
newp->next));
/* Update the statistics. */
if (data == (void *) -1)

4
stdlib/cxa_finalize.c
View file

@ -36,8 +36,8 @@ __cxa_finalize (void *d)
for (f = &funcs->fns[funcs->idx - 1]; f >= &funcs->fns[0]; --f)
if ((d == NULL || d == f->func.cxa.dso_handle)
/* We don't want to run this cleanup more than once. */
&& (atomic_compare_and_exchange_acq (&f->flavor, ef_free, ef_cxa)
== 0))
&& ! atomic_compare_and_exchange_bool_acq (&f->flavor, ef_free,
ef_cxa))
(*f->func.cxa.fn) (f->func.cxa.arg, 0);
}

49
sysdeps/i386/i486/bits/atomic.h
View file

@ -55,23 +55,23 @@ typedef uintmax_t uatomic_max_t;
#endif
#define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
({ unsigned char ret; \
__asm __volatile (LOCK "cmpxchgb %b2, %1; setne %0" \
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgb %b2, %1" \
: "=a" (ret), "=m" (*mem) \
: "q" (newval), "1" (*mem), "0" (oldval)); \
ret; })
#define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
({ unsigned char ret; \
__asm __volatile (LOCK "cmpxchgw %w2, %1; setne %0" \
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgw %w2, %1" \
: "=a" (ret), "=m" (*mem) \
: "r" (newval), "1" (*mem), "0" (oldval)); \
ret; })
#define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
({ unsigned char ret; \
__asm __volatile (LOCK "cmpxchgl %2, %1; setne %0" \
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgl %2, %1" \
: "=a" (ret), "=m" (*mem) \
: "r" (newval), "1" (*mem), "0" (oldval)); \
ret; })
@ -83,37 +83,34 @@ typedef uintmax_t uatomic_max_t;
really going to be used the code below can be used on Intel Pentium
and later, but NOT on i486. */
#if 1
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
(abort (), 0)
#else
# ifdef __PIC__
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
({ unsigned char ret; \
int ignore; \
__asm __volatile ("xchgl %3, %%ebx\n\t" \
LOCK "cmpxchg8b %2, %1\n\t" \
"setne %0\n\t" \
"xchgl %3, %%ebx" \
: "=a" (ret), "=m" (*mem), "=d" (ignore) \
# define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile ("xchgl %2, %%ebx\n\t" \
LOCK "cmpxchg8b %1\n\t" \
"xchgl %2, %%ebx" \
: "=A" (ret), "=m" (*mem) \
: "DS" (((unsigned long long int) (newval)) \
& 0xffffffff), \
"c" (((unsigned long long int) (newval)) >> 32), \
"1" (*mem), "0" (((unsigned long long int) (oldval)) \
"1" (*mem), "a" (((unsigned long long int) (oldval)) \
& 0xffffffff), \
"2" (((unsigned long long int) (oldval)) >> 32)); \
"d" (((unsigned long long int) (oldval)) >> 32)); \
ret; })
# else
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
({ unsigned char ret; \
int ignore; \
__asm __volatile (LOCK "cmpxchg8b %2, %1; setne %0" \
: "=a" (ret), "=m" (*mem), "=d" (ignore) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchg8b %1" \
: "=A" (ret), "=m" (*mem) \
: "b" (((unsigned long long int) (newval)) \
& 0xffffffff), \
"c" (((unsigned long long int) (newval)) >> 32), \
"1" (*mem), "0" (((unsigned long long int) (oldval)) \
"1" (*mem), "a" (((unsigned long long int) (oldval)) \
& 0xffffffff), \
"2" (((unsigned long long int) (oldval)) >> 32)); \
"d" (((unsigned long long int) (oldval)) >> 32)); \
ret; })
# endif
#endif

18
sysdeps/ia64/bits/atomic.h
View file

@ -45,25 +45,31 @@ typedef intmax_t atomic_max_t;
typedef uintmax_t uatomic_max_t;
#define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
(!__sync_bool_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
(int) (long) (newval)))
#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
(!__sync_bool_compare_and_swap_di ((long *) (mem), (long) (oldval), \
(long) (newval)))
#define __arch_compare_and_exchange_32_val_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
__sync_val_compare_and_swap_si ((int *) (mem), (int) (long) (oldval), \
(int) (long) (newval))
#define __arch_compare_and_exchange_64_val_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
__sync_val_compare_and_swap_di ((long *) (mem), (long) (oldval), \
(long) (newval))

62
sysdeps/powerpc/bits/atomic.h
View file

@ -46,10 +46,10 @@ typedef intmax_t atomic_max_t;
typedef uintmax_t uatomic_max_t;
#define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
(abort (), 0)
#ifdef UP
@ -69,41 +69,41 @@ typedef uintmax_t uatomic_max_t;
* XXX this may not work properly on 64-bit if the register
* containing oldval has the high half non-zero for some reason.
*/
#define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
({ \
unsigned int __tmp; \
__asm __volatile (__ARCH_REL_INSTR "\n" \
"1: lwarx %0,0,%1\n" \
" subf. %0,%2,%0\n" \
" bne 2f\n" \
" stwcx. %3,0,%1\n" \
" bne- 1b\n" \
"2: " __ARCH_ACQ_INSTR \
: "=&r" (__tmp) \
: "r" (mem), "r" (oldval), "r" (newval) \
: "cr0", "memory"); \
__tmp != 0; \
#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
({ \
unsigned int __tmp; \
__asm __volatile (__ARCH_REL_INSTR "\n" \
"1: lwarx %0,0,%1\n" \
" subf. %0,%2,%0\n" \
" bne 2f\n" \
" stwcx. %3,0,%1\n" \
" bne- 1b\n" \
"2: " __ARCH_ACQ_INSTR \
: "=&r" (__tmp) \
: "r" (mem), "r" (oldval), "r" (newval) \
: "cr0", "memory"); \
__tmp != 0; \
})
#ifdef __powerpc64__
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval)\
({ \
unsigned long __tmp; \
__asm __volatile (__ARCH_REL_INSTR "\n" \
"1: ldarx %0,0,%1\n" \
" subf. %0,%2,%0\n" \
" bne 2f\n" \
" stdcx. %3,0,%1\n" \
" bne- 1b\n" \
"2: " __ARCH_ACQ_INSTR \
: "=&r" (__tmp) \
: "r" (mem), "r" (oldval), "r" (newval) \
: "cr0", "memory"); \
__tmp != 0; \
# define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
({ \
unsigned long __tmp; \
__asm __volatile (__ARCH_REL_INSTR "\n" \
"1: ldarx %0,0,%1\n" \
" subf. %0,%2,%0\n" \
" bne 2f\n" \
" stdcx. %3,0,%1\n" \
" bne- 1b\n" \
"2: " __ARCH_ACQ_INSTR \
: "=&r" (__tmp) \
: "r" (mem), "r" (oldval), "r" (newval) \
: "cr0", "memory"); \
__tmp != 0; \
})
#else /* powerpc32 */
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
# define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
(abort (), 0)
#endif

10
sysdeps/s390/bits/atomic.h
View file

@ -45,13 +45,13 @@ typedef intmax_t atomic_max_t;
typedef uintmax_t uatomic_max_t;
#define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_8_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_16_acq(mem, newval, oldval) \
(abort (), 0)
#define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
#define __arch_compare_and_exchange_bool_32_acq(mem, newval, oldval) \
({ unsigned int *__mem = (unsigned int *) (mem); \
unsigned int __old = (unsigned int) (oldval); \
unsigned int __cmp = __old; \
@ -61,7 +61,7 @@ typedef uintmax_t uatomic_max_t;
__cmp != __old; })
#ifdef __s390x__
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
# define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
({ unsigned long int *__mem = (unsigned long int *) (mem); \
unsigned long int __old = (unsigned long int) (oldval); \
unsigned long int __cmp = __old; \
@ -73,6 +73,6 @@ typedef uintmax_t uatomic_max_t;
/* For 31 bit we do not really need 64-bit compare-and-exchange. We can
implement them by use of the csd instruction. The straightforward
implementation causes warnings so we skip the definition for now. */
# define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
# define __arch_compare_and_exchange_bool_64_acq(mem, newval, oldval) \
(abort (), 0)
#endif

2
sysdeps/unix/sysv/linux/getsysstats.c
View file

@ -85,7 +85,7 @@ get_proc_path (char *buffer, size_t bufsize)
/* Now store the copied value. But do it atomically. */
assert (sizeof (long int) == sizeof (void *__unbounded));
if (atomic_compare_and_exchange_acq (&mount_proc, copy_result, NULL) == 0)
if (! atomic_compare_and_exchange_bool_acq (&mount_proc, copy_result, NULL))
/* Replacing the value failed. This means another thread was
faster and we don't need the copy anymore. */
free (copy_result);

16
sysdeps/x86_64/bits/atomic.h
View file

@ -55,29 +55,29 @@ typedef uintmax_t uatomic_max_t;
#endif
#define __arch_compare_and_exchange_8_acq(mem, newval, oldval) \
({ unsigned char ret; \
#define __arch_compare_and_exchange_val_8_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgb %b2, %1; setne %0" \
: "=a" (ret), "=m" (*mem) \
: "q" (newval), "1" (*mem), "0" (oldval)); \
ret; })
#define __arch_compare_and_exchange_16_acq(mem, newval, oldval) \
({ unsigned char ret; \
#define __arch_compare_and_exchange_val_16_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgw %w2, %1; setne %0" \
: "=a" (ret), "=m" (*mem) \
: "r" (newval), "1" (*mem), "0" (oldval)); \
ret; })
#define __arch_compare_and_exchange_32_acq(mem, newval, oldval) \
({ unsigned char ret; \
#define __arch_compare_and_exchange_val_32_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgl %2, %1; setne %0" \
: "=a" (ret), "=m" (*mem) \
: "r" (newval), "1" (*mem), "0" (oldval)); \
ret; })
#define __arch_compare_and_exchange_64_acq(mem, newval, oldval) \
({ unsigned char ret; \
#define __arch_compare_and_exchange_val_64_acq(mem, newval, oldval) \
({ __typeof (*mem) ret; \
__asm __volatile (LOCK "cmpxchgq %q2, %1; setne %0" \
: "=a" (ret), "=m" (*mem) \
: "r" (newval), "1" (*mem), "0" (oldval)); \