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MINOR: thread: implement HA_ATOMIC_XADD()

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We've been missing it several times and now we'll need it to increment
a request counter. Let's do it once for all.

This patch will need to be backported to 1.8 with the associated fix.
This commit is contained in:
Willy Tarreau 2018-09-05 16:11:03 +02:00
parent f16cb41d19
commit 9378df89f6
1 changed files with 9 additions and 0 deletions
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9
include/common/hathreads.h
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@ -47,6 +47,13 @@ enum { tid = 0 };
#define HA_ATOMIC_CAS(val, old, new) ({((*val) == (*old)) ? (*(val) = (new) , 1) : (*(old) = *(val), 0);})
#define HA_ATOMIC_ADD(val, i) ({*(val) += (i);})
#define HA_ATOMIC_SUB(val, i) ({*(val) -= (i);})
#define HA_ATOMIC_XADD(val, i) \
({ \
typeof((val)) __p_xadd = (val); \
typeof(*(val)) __old_xadd = *__p_xadd; \
*__p_xadd += i; \
__old_xadd; \
})
#define HA_ATOMIC_AND(val, flags) ({*(val) &= (flags);})
#define HA_ATOMIC_OR(val, flags) ({*(val) |= (flags);})
#define HA_ATOMIC_XCHG(val, new) \
@ -169,6 +176,7 @@ static inline unsigned long thread_isolated()
#define HA_ATOMIC_ADD(val, i) __sync_add_and_fetch(val, i)
#define HA_ATOMIC_SUB(val, i) __sync_sub_and_fetch(val, i)
#define HA_ATOMIC_XADD(val, i) __sync_fetch_and_add(val, i)
#define HA_ATOMIC_AND(val, flags) __sync_and_and_fetch(val, flags)
#define HA_ATOMIC_OR(val, flags) __sync_or_and_fetch(val, flags)
@ -230,6 +238,7 @@ static inline unsigned long thread_isolated()
/* gcc >= 4.7 */
#define HA_ATOMIC_CAS(val, old, new) __atomic_compare_exchange_n(val, old, new, 0, 0, 0)
#define HA_ATOMIC_ADD(val, i) __atomic_add_fetch(val, i, 0)
#define HA_ATOMIC_XADD(val, i) __atomic_fetch_add(val, i, 0)
#define HA_ATOMIC_SUB(val, i) __atomic_sub_fetch(val, i, 0)
#define HA_ATOMIC_AND(val, flags) __atomic_and_fetch(val, flags, 0)
#define HA_ATOMIC_OR(val, flags) __atomic_or_fetch(val, flags, 0)