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typon
typon-concurrency
Commits
4f67c5a3
Commit
4f67c5a3
authored
Jun 20, 2022
by
Xavier Thompson
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Improve event_count.hpp
parent
663bf85b
Changes
1
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8 additions
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10 deletions
+8
-10
rt/include/typon/fundamental/event_count.hpp
rt/include/typon/fundamental/event_count.hpp
+8
-10
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rt/include/typon/fundamental/event_count.hpp
View file @
4f67c5a3
...
@@ -22,25 +22,23 @@ namespace typon::fdt::lock_free
...
@@ -22,25 +22,23 @@ namespace typon::fdt::lock_free
auto
prepare_wait
()
noexcept
auto
prepare_wait
()
noexcept
{
{
return
_state
.
fetch_add
(
1
,
std
::
memory_order_acq_rel
);
return
_state
.
load
(
std
::
memory_order_acquire
);
}
}
void
cancel_wait
()
noexcept
void
cancel_wait
()
noexcept
{}
{
_state
.
fetch_sub
(
1
,
std
::
memory_order_seq_cst
);
}
void
wait
(
u64
state
)
noexcept
void
wait
(
u64
key
)
noexcept
{
{
u64
state
=
_state
.
fetch_add
(
1
,
std
::
memory_order_acq_rel
)
+
1
;
for
(;;)
for
(;;)
{
{
_state
.
wait
(
state
,
std
::
memory_order_acquire
);
if
((
state
^
key
)
&
(
~
mask
))
auto
newstate
=
_state
.
load
(
std
::
memory_order_acquire
);
if
((
newstate
^
state
)
&
(
~
mask
))
{
{
break
;
break
;
}
}
state
=
newstate
;
key
=
state
;
_state
.
wait
(
key
,
std
::
memory_order_acquire
);
state
=
_state
.
load
(
std
::
memory_order_acquire
);
}
}
_state
.
fetch_sub
(
1
,
std
::
memory_order_seq_cst
);
_state
.
fetch_sub
(
1
,
std
::
memory_order_seq_cst
);
}
}
...
...
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