优化

2024-02-15 16:39:56 +08:00
parent 7e8e65dcbd
commit 9d4bcbf091
1 changed files with 16 additions and 2 deletions
@@ -12,7 +12,7 @@ class PictureMirror {

    @Volatile
    var isDirty = true
-    val lock = ReentrantLock()
+    var lock: ReentrantLock? = null

    inline fun drawLocked(
        canvas: Canvas?,
@@ -21,8 +21,22 @@ class PictureMirror {
        block: Canvas.() -> Unit
    ) {
        if (atLeastApi23) {
-            if (picture == null) picture = Picture()
+            if (picture == null) {
+                synchronized(this) {
+                    if (picture == null) {
+                        picture = Picture()
+                    }
+                }
+            }
+            if (lock == null) {
+                synchronized(this) {
+                    if (lock == null) {
+                        lock = ReentrantLock()
+                    }
+                }
+            }
            val picture = picture!!
+            val lock = lock!!
            if (isDirty) {
                if (!lock.tryLock()) return
                try {