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* atomic.h: Add a couple more default implementations.
	(atomic_compare_and_exchange_acq): Use
This commit is contained in:
Ulrich Drepper 2003-02-05 07:22:09 +00:00
parent d45e874013
commit ec609a8e77
2 changed files with 42 additions and 11 deletions
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3
nptl/ChangeLog
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@ -1,6 +1,7 @@
2003-02-04 Ulrich Drepper <drepper@redhat.com>
* atomic.h (atomic_compare_and_exchange_acq): Use
* atomic.h: Add a couple more default implementations.
(atomic_compare_and_exchange_acq): Use
__arch_compare_and_exchange_32_acq in return value definition. It
always exists.
(atomic_bit_set): Renamed from atomic_set_bit.

50
nptl/atomic.h
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@ -60,7 +60,7 @@
while (atomic_compare_and_exchange_acq (__memp, __oldval + __value, \
__oldval)); \
\
__value; })
__oldval; })
#endif
@ -74,23 +74,53 @@
#endif
#ifndef atomic_increment_and_test
# define atomic_increment_and_test(mem) \
(atomic_exchange_and_add (mem, 1) == 0)
#endif
#ifndef atomic_decrement
# define atomic_decrement(mem) atomic_add (mem, -1)
#endif
#ifndef atomic_decrement_and_test
# define atomic_decrement_and_test(mem) \
(atomic_exchange_and_add (mem, -1) == 0)
#endif
#ifdef atomic_add_negative
# define atomic_add_negative(mem, value) \
(atomic_exchange_and_add (mem, value) < 0)
#endif
#ifndef atomic_add_zero
# define atomic_add_zero(mem, value) \
(atomic_exchange_and_add (mem, value) == 0)
#endif
#ifndef atomic_bit_set
# define atomic_bit_set(mem, bit) \
(void) ({ __typeof (mem) __memp = (mem); \
__typeof (*mem) __mask = (1 << (bit)); \
__typeof (*mem) __oldval; \
(void) atomic_bit_test_set(mem, bit)
#endif
#ifndef atomic_bit_test_set
# define atomic_bit_test_set(mem, bit) \
({ __typeof (*mem) __oldval; \
__typeof (mem) __memp = (mem); \
__typeof (*mem) __mask = (1 << (bit)); \
\
do \
__oldval = *__memp; \
while (atomic_compare_and_exchange_acq (__memp, \
__oldval | __mask, \
__oldval)); \
}})
do \
__oldval = (*__memp); \
while (atomic_compare_and_exchange_acq (__memp, \
__oldval | __mask, __oldval)); \
\
__oldval & __mask; })
#endif