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Return post modification value from ocf_refcnt_inc/dec

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If counter is frozen then increment returns 0.

Signed-off-by: Adam Rutkowski <adam.j.rutkowski@intel.com>
This commit is contained in:
Adam Rutkowski
2019-04-09 16:29:24 -04:00
parent 962f9d17d1
commit 0e15c693fd
3 changed files with 17 additions and 12 deletions
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14
src/utils/utils_refcnt.c
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@@ -13,26 +13,30 @@ void ocf_refcnt_init(struct ocf_refcnt *rc)
rc->cb = NULL;
}
void ocf_refcnt_dec(struct ocf_refcnt *rc)
int ocf_refcnt_dec(struct ocf_refcnt *rc)
{
int val = env_atomic_dec_return(&rc->counter);
ENV_BUG_ON(val < 0);
if (!val && env_atomic_cmpxchg(&rc->callback, 1, 0))
rc->cb(rc->priv);
return val;
}
bool ocf_refcnt_inc(struct ocf_refcnt *rc)
int ocf_refcnt_inc(struct ocf_refcnt *rc)
{
int val;
if (!env_atomic_read(&rc->freeze)) {
env_atomic_inc(&rc->counter);
val = env_atomic_inc_return(&rc->counter);
if (!env_atomic_read(&rc->freeze))
return true;
return val;
else
ocf_refcnt_dec(rc);
}
return false;
return 0;
}