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* include/atomic.h: Put parens around all macro arguments.

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(__atomic_val_bysize, __atomic_bool_bysize): New macros.
	(atomic_compare_and_exchange_val_acq): Use it.
	(atomic_compare_and_exchange_bool_acq): Likewise.
	(atomic_increment_and_test): Invert sense of test.
	(atomic_decrement_and_test): Likewise.
	* csu/tst-atomic.c: Update those tests to match.
This commit is contained in:
Roland McGrath 2003-03-22 23:38:18 +00:00
parent d15851ec24
commit fe4610b301
3 changed files with 83 additions and 53 deletions
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10
ChangeLog
View File

@ -1,8 +1,12 @@
2003-03-22 Roland McGrath <roland@redhat.com> 2003-03-22 Roland McGrath <roland@redhat.com>
* include/atomic.h (atomic_increment_and_test): Invert sense of test. * include/atomic.h: Put parens around all macro arguments.
Add comment. (__atomic_val_bysize, __atomic_bool_bysize): New macros.
(atomic_decrement_and_test): Add comment. (atomic_compare_and_exchange_val_acq): Use it.
(atomic_compare_and_exchange_bool_acq): Likewise.
(atomic_increment_and_test): Invert sense of test.
(atomic_decrement_and_test): Likewise.
* csu/tst-atomic.c: Update those tests to match.
2003-03-22 Jakub Jelinek <jakub@redhat.com> 2003-03-22 Jakub Jelinek <jakub@redhat.com>

20
csu/tst-atomic.c
View File

@ -99,7 +99,7 @@ do_test (void)
} }
mem = 0; mem = 0;
if (! atomic_increment_and_test (&mem) if (atomic_increment_and_test (&mem)
|| mem != 1) || mem != 1)
{ {
puts ("atomic_increment_and_test test 1 failed"); puts ("atomic_increment_and_test test 1 failed");
@ -114,6 +114,14 @@ do_test (void)
ret = 1; ret = 1;
} }
mem = -1;
if (! atomic_increment_and_test (&mem)
|| mem != 0)
{
puts ("atomic_increment_and_test test 3 failed");
ret = 1;
}
mem = 17; mem = 17;
atomic_decrement (&mem); atomic_decrement (&mem);
if (mem != 16) if (mem != 16)
@ -123,7 +131,7 @@ do_test (void)
} }
mem = 0; mem = 0;
if (! atomic_decrement_and_test (&mem) if (atomic_decrement_and_test (&mem)
|| mem != -1) || mem != -1)
{ {
puts ("atomic_decrement_and_test test 1 failed"); puts ("atomic_decrement_and_test test 1 failed");
@ -138,6 +146,14 @@ do_test (void)
ret = 1; ret = 1;
} }
mem = 1;
if (! atomic_decrement_and_test (&mem)
|| mem != 0)
{
puts ("atomic_decrement_and_test test 1 failed");
ret = 1;
}
mem = 1; mem = 1;
if (atomic_decrement_if_positive (&mem) != 1 if (atomic_decrement_if_positive (&mem) != 1
|| mem != 0) || mem != 0)

106
include/atomic.h
View File

@ -25,30 +25,54 @@
#include <bits/atomic.h> #include <bits/atomic.h>
/* Wrapper macros to call pre_NN_post (mem, ...) where NN is the
bit width of *MEM. The calling macro puts parens around MEM
and following args. */
#define __atomic_val_bysize(pre, post, mem, ...) \
({ \
__typeof (*mem) __result; \
if (sizeof (*mem) == 1) \
__result = pre##_8_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 2) \
__result = pre##_16_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 4) \
__result = pre##_32_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 8) \
__result = pre##_64_##post (mem, __VA_ARGS__); \
else \
abort (); \
__result; \
})
#define __atomic_bool_bysize(pre, post, mem, ...) \
({ \
int __result; \
if (sizeof (*mem) == 1) \
__result = pre##_8_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 2) \
__result = pre##_16_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 4) \
__result = pre##_32_##post (mem, __VA_ARGS__); \
else if (sizeof (*mem) == 8) \
__result = pre##_64_##post (mem, __VA_ARGS__); \
else \
abort (); \
__result; \
})
/* Atomically store NEWVAL in *MEM if *MEM is equal to OLDVAL. /* Atomically store NEWVAL in *MEM if *MEM is equal to OLDVAL.
Return the old *MEM value. */ Return the old *MEM value. */
#if !defined atomic_compare_and_exchange_val_acq \ #if !defined atomic_compare_and_exchange_val_acq \
&& defined __arch_compare_and_exchange_val_32_acq && defined __arch_compare_and_exchange_val_32_acq
# define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ # define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \
({ __typeof (*mem) __result; \ __atomic_val_bysize (__arch_compare_and_exchange_val,acq, \
if (sizeof (*mem) == 1) \ (mem), (newval), (oldval))
__result = __arch_compare_and_exchange_val_8_acq (mem, newval, oldval);\
else if (sizeof (*mem) == 2) \
__result = __arch_compare_and_exchange_val_16_acq (mem, newval,oldval);\
else if (sizeof (*mem) == 4) \
__result = __arch_compare_and_exchange_val_32_acq (mem, newval,oldval);\
else if (sizeof (*mem) == 8) \
__result = __arch_compare_and_exchange_val_64_acq (mem, newval,oldval);\
else \
abort (); \
__result; })
#endif #endif
#ifndef atomic_compare_and_exchange_val_rel #ifndef atomic_compare_and_exchange_val_rel
# define atomic_compare_and_exchange_val_rel(mem, oldval, newval) \ # define atomic_compare_and_exchange_val_rel(mem, oldval, newval) \
atomic_compare_and_exchange_val_acq (mem, oldval, newval) atomic_compare_and_exchange_val_acq ((mem), (oldval), (newval))
#endif #endif
@ -56,29 +80,15 @@
Return zero if *MEM was changed or non-zero if no exchange happened. */ Return zero if *MEM was changed or non-zero if no exchange happened. */
#ifndef atomic_compare_and_exchange_bool_acq #ifndef atomic_compare_and_exchange_bool_acq
# ifdef __arch_compare_and_exchange_bool_32_acq # ifdef __arch_compare_and_exchange_bool_32_acq
# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ # define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
({ __typeof (__arch_compare_and_exchange_bool_32_acq (mem, 0, 0)) __result; \ __atomic_bool_bysize (__arch_compare_and_exchange_bool,acq, \
if (sizeof (*mem) == 1) \ (mem), (newval), (oldval))
__result = __arch_compare_and_exchange_bool_8_acq (mem, newval, \
oldval); \
else if (sizeof (*mem) == 2) \
__result = __arch_compare_and_exchange_bool_16_acq (mem, newval, \
oldval); \
else if (sizeof (*mem) == 4) \
__result = __arch_compare_and_exchange_bool_32_acq (mem, newval, \
oldval); \
else if (sizeof (*mem) == 8) \
__result = __arch_compare_and_exchange_bool_64_acq (mem, newval, \
oldval); \
else \
abort (); \
__result; })
# else # else
# define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \ # define atomic_compare_and_exchange_bool_acq(mem, newval, oldval) \
({ /* Cannot use __oldval here, because macros later in this file might \ ({ /* Cannot use __oldval here, because macros later in this file might \
call this macro with __oldval argument. */ \ call this macro with __oldval argument. */ \
__typeof (oldval) __old = (oldval); \ __typeof (oldval) __old = (oldval); \
atomic_compare_and_exchange_val_acq (mem, newval, __old) != __old; \ atomic_compare_and_exchange_val_acq ((mem), (newval), __old) != __old; \
}) })
# endif # endif
#endif #endif
@ -86,16 +96,16 @@
#ifndef atomic_compare_and_exchange_bool_rel #ifndef atomic_compare_and_exchange_bool_rel
# define atomic_compare_and_exchange_bool_rel(mem, oldval, newval) \ # define atomic_compare_and_exchange_bool_rel(mem, oldval, newval) \
atomic_compare_and_exchange_bool_acq (mem, oldval, newval) atomic_compare_and_exchange_bool_acq ((mem), (oldval), (newval))
#endif #endif
/* Store NEWVALUE in *MEM and return the old value. */ /* Store NEWVALUE in *MEM and return the old value. */
#ifndef atomic_exchange #ifndef atomic_exchange
# define atomic_exchange(mem, newvalue) \ # define atomic_exchange(mem, newvalue) \
({ __typeof (*mem) __oldval; \ ({ __typeof (*(mem)) __oldval; \
__typeof (mem) __memp = (mem); \ __typeof (mem) __memp = (mem); \
__typeof (*mem) __value = (newvalue); \ __typeof (*(mem)) __value = (newvalue); \
\ \
do \ do \
__oldval = (*__memp); \ __oldval = (*__memp); \
@ -111,9 +121,9 @@
/* Add VALUE to *MEM and return the old value of *MEM. */ /* Add VALUE to *MEM and return the old value of *MEM. */
#ifndef atomic_exchange_and_add #ifndef atomic_exchange_and_add
# define atomic_exchange_and_add(mem, value) \ # define atomic_exchange_and_add(mem, value) \
({ __typeof (*mem) __oldval; \ ({ __typeof (*(mem)) __oldval; \
__typeof (mem) __memp = (mem); \ __typeof (mem) __memp = (mem); \
__typeof (*mem) __value = (value); \ __typeof (*(mem)) __value = (value); \
\ \
do \ do \
__oldval = (*__memp); \ __oldval = (*__memp); \
@ -128,38 +138,38 @@
#ifndef atomic_add #ifndef atomic_add
# define atomic_add(mem, value) (void) atomic_exchange_and_add (mem, value) # define atomic_add(mem, value) (void) atomic_exchange_and_add ((mem), (value))
#endif #endif
#ifndef atomic_increment #ifndef atomic_increment
# define atomic_increment(mem) atomic_add (mem, 1) # define atomic_increment(mem) atomic_add ((mem), 1)
#endif #endif
/* Add one to *MEM and return true iff it's now nonzero. */ /* Add one to *MEM and return true iff it's now zero. */
#ifndef atomic_increment_and_test #ifndef atomic_increment_and_test
# define atomic_increment_and_test(mem) \ # define atomic_increment_and_test(mem) \
(atomic_exchange_and_add (mem, 1) != 0) (atomic_exchange_and_add ((mem), 1) + 1 == 0)
#endif #endif
#ifndef atomic_decrement #ifndef atomic_decrement
# define atomic_decrement(mem) atomic_add (mem, -1) # define atomic_decrement(mem) atomic_add ((mem), -1)
#endif #endif
/* Subtract 1 from *MEM and return true iff it's now zero. */ /* Subtract 1 from *MEM and return true iff it's now zero. */
#ifndef atomic_decrement_and_test #ifndef atomic_decrement_and_test
# define atomic_decrement_and_test(mem) \ # define atomic_decrement_and_test(mem) \
(atomic_exchange_and_add (mem, -1) == 0) (atomic_exchange_and_add ((mem), -1) == 1)
#endif #endif
/* Decrement *MEM if it is > 0, and return the old value. */ /* Decrement *MEM if it is > 0, and return the old value. */
#ifndef atomic_decrement_if_positive #ifndef atomic_decrement_if_positive
# define atomic_decrement_if_positive(mem) \ # define atomic_decrement_if_positive(mem) \
({ __typeof (*mem) __oldval; \ ({ __typeof (*(mem)) __oldval; \
__typeof (mem) __memp = (mem); \ __typeof (mem) __memp = (mem); \
\ \
do \ do \
@ -179,27 +189,27 @@
#ifndef atomic_add_negative #ifndef atomic_add_negative
# define atomic_add_negative(mem, value) \ # define atomic_add_negative(mem, value) \
(atomic_exchange_and_add (mem, value) < 0) (atomic_exchange_and_add ((mem), (value)) < 0)
#endif #endif
#ifndef atomic_add_zero #ifndef atomic_add_zero
# define atomic_add_zero(mem, value) \ # define atomic_add_zero(mem, value) \
(atomic_exchange_and_add (mem, value) == 0) (atomic_exchange_and_add ((mem), (value)) == 0)
#endif #endif
#ifndef atomic_bit_set #ifndef atomic_bit_set
# define atomic_bit_set(mem, bit) \ # define atomic_bit_set(mem, bit) \
(void) atomic_bit_test_set(mem, bit) (void) atomic_bit_test_set((mem), (bit))
#endif #endif
#ifndef atomic_bit_test_set #ifndef atomic_bit_test_set
# define atomic_bit_test_set(mem, bit) \ # define atomic_bit_test_set(mem, bit) \
({ __typeof (*mem) __oldval; \ ({ __typeof (*(mem)) __oldval; \
__typeof (mem) __memp = (mem); \ __typeof (mem) __memp = (mem); \
__typeof (*mem) __mask = ((__typeof (*mem)) 1 << (bit)); \ __typeof (*(mem)) __mask = ((__typeof (*(mem))) 1 << (bit)); \
\ \
do \ do \
__oldval = (*__memp); \ __oldval = (*__memp); \