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android-kvm
/
linux
/
c460e7896e6906d4e154f2e7fb7f40d46edbd006
/
.
/
scripts
/
atomic
/
fallbacks
/
dec_if_positive
blob: 86bdced3428d6fa467de40e5bf398b1ec7a74f43 [
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cat
<<
EOF
static
__always_inline $
{
ret
}
arch_$
{
atomic
}
_dec_if_positive
(
$
{
atomic
}
_t
*
v
)
{
$
{
int
}
dec
,
c
=
arch_$
{
atomic
}
_read
(
v
);
do
{
dec
=
c
-
1
;
if
(
unlikely
(
dec
<
0
))
break
;
}
while
(!
arch_$
{
atomic
}
_try_cmpxchg
(
v
,
&
c
,
dec
));
return
dec
;
}
EOF