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/
9453b2d4694c2cb6c30d99e65d4a3deb09e94ac3
/
.
/
scripts
/
atomic
/
fallbacks
/
dec_unless_positive
blob: dcab6848ca1e5a2535c0a144cf7cb4af4d8a3e52 [
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cat
<<
EOF
static
__always_inline
bool
$
{
arch
}
$
{
atomic
}
_dec_unless_positive
(
$
{
atomic
}
_t
*
v
)
{
$
{
int
}
c
=
$
{
arch
}
$
{
atomic
}
_read
(
v
);
do
{
if
(
unlikely
(
c
>
0
))
return
false
;
}
while
(!
$
{
arch
}
$
{
atomic
}
_try_cmpxchg
(
v
,
&
c
,
c
-
1
));
return
true
;
}
EOF