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Mirai
Commits
2e614f65
Commit
2e614f65
authored
Feb 15, 2020
by
Him188
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EventListeners: use atomic lock to avoid redundant object creation
parent
8ea7027f
Changes
1
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1 changed file
with
17 additions
and
8 deletions
+17
-8
mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt
.../net.mamoe.mirai/event/internal/InternalEventListeners.kt
+17
-8
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mirai-core/src/commonMain/kotlin/net.mamoe.mirai/event/internal/InternalEventListeners.kt
View file @
2e614f65
...
...
@@ -9,6 +9,7 @@
package
net.mamoe.mirai.event.internal
import
kotlinx.atomicfu.atomic
import
kotlinx.coroutines.*
import
net.mamoe.mirai.event.Event
import
net.mamoe.mirai.event.EventDisabled
...
...
@@ -87,14 +88,22 @@ internal object EventListenerManager {
private
val
registries
=
LockFreeLinkedList
<
Registry
<
*
>>()
@Suppress
(
"UNCHECKED_CAST"
)
internal
fun
<
E
:
Event
>
get
(
clazz
:
KClass
<
out
E
>):
EventListeners
<
E
>
{
return
registries
.
filteringGetOrAdd
({
it
.
clazz
==
clazz
})
{
Registry
(
clazz
,
EventListeners
()
)
}.
listeners
as
EventListeners
<
E
>
private
val
lock
=
atomic
(
false
)
@Suppress
(
"UNCHECKED_CAST"
,
"BooleanLiteralArgument"
)
internal
tailrec
fun
<
E
:
Event
>
get
(
clazz
:
KClass
<
out
E
>):
EventListeners
<
E
>
{
registries
.
forEach
{
if
(
it
.
clazz
==
clazz
)
{
return
it
.
listeners
as
EventListeners
<
E
>
}
}
if
(
lock
.
compareAndSet
(
false
,
true
))
{
val
registry
=
Registry
(
clazz
,
EventListeners
())
registries
.
addLast
(
registry
)
lock
.
value
=
false
return
registry
.
listeners
as
EventListeners
<
E
>
}
return
get
(
clazz
)
}
}
...
...
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