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base: heim_base_exchange_{32,64} for platforms without atomics

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heim_base_exchange_32() and heim_base_exchange_64() inline functions for
platforms without atomics were missing (these are very inefficient but,
clearly rarely used given the lack of build error reports)
This commit is contained in:
Luke Howard
2020-07-13 09:57:52 +10:00
parent fcfca367cf
commit 932605c01e
1 changed files with 22 additions and 0 deletions
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22
lib/base/heimbase-atomics.h
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@@ -171,6 +171,28 @@ heim_base_exchange_pointer(void *target, void *value)
return old;
}
static inline uint32_t
heim_base_exchange_32(uint32_t *p, uint32_t newval)
{
uint32_t old;
HEIMDAL_MUTEX_lock(&_heim_base_mutex);
old = *p;
*p = newval;
HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
return old;
}
static inline uint64_t
heim_base_exchange_64(uint64_t *p, uint64_t newval)
{
uint64_t old;
HEIMDAL_MUTEX_lock(&_heim_base_mutex);
old = *p;
*p = newval;
HEIMDAL_MUTEX_unlock(&_heim_base_mutex);
return old;
}
#endif /* defined(__GNUC__) && defined(HAVE___SYNC_ADD_AND_FETCH) */
#if SIZEOF_TIME_T == 8