fix SplitByteBuffer close bug

ts-core/ts-buffer/src/main/kotlin/cn/tursom/core/buffer/ByteBuffer.kt

@@ -58,6 +58,7 @@ interface ByteBuffer : Closeable {
   val resized: Boolean
 
   override fun close() {}
+  fun closeChild(child: ByteBuffer) {}
 
   fun readBuffer(): java.nio.ByteBuffer
   fun finishRead(buffer: java.nio.ByteBuffer) {

ts-core/ts-buffer/src/main/kotlin/cn/tursom/core/buffer/impl/SplitByteBuffer.kt

@@ -6,9 +6,9 @@ import java.util.concurrent.atomic.AtomicBoolean
 import java.util.concurrent.atomic.AtomicInteger
 
 class SplitByteBuffer(
-  private val parent: ByteBuffer,
+  val parent: ByteBuffer,
   private val childCount: AtomicInteger,
-  override val agent: ByteBuffer
+  override val agent: ByteBuffer,
 ) : ProxyByteBuffer, ByteBuffer by agent {
   init {
     childCount.incrementAndGet()
@@ -21,10 +21,7 @@ class SplitByteBuffer(
   override fun close() {
     if (atomicClosed.compareAndSet(false, true)) {
       agent.close()
-      childCount.decrementAndGet()
-      if (childCount.get() == 0 && (parent.closed || parent.resized)) {
-        parent.close()
-      }
+      parent.closeChild(this)
     }
   }
 
@@ -43,4 +40,8 @@ class SplitByteBuffer(
   protected fun finalize() {
     close()
   }
+
+  override fun toString(): String {
+    return "SplitByteBuffer(parent=$parent, childCount=$childCount, agent=$agent)"
+  }
 }

ts-core/ts-pool/src/main/kotlin/cn/tursom/core/buffer/impl/InstantByteBuffer.kt

@@ -3,18 +3,38 @@ package cn.tursom.core.buffer.impl
 import cn.tursom.core.buffer.ByteBuffer
 import cn.tursom.core.buffer.ProxyByteBuffer
 import cn.tursom.core.pool.MemoryPool
+import java.util.concurrent.atomic.AtomicInteger
 
 class InstantByteBuffer(
   override val agent: ByteBuffer,
-  val pool: MemoryPool
+  val pool: MemoryPool,
 ) : ProxyByteBuffer, ByteBuffer by agent {
   override var closed = false
+  private val childCount = AtomicInteger(0)
 
   override fun close() {
+    if (childCount.get() == 0) {
       agent.close()
       pool.free(this)
       closed = true
     }
+  }
+
+  override fun closeChild(child: ByteBuffer) {
+    if (child is SplitByteBuffer && child.parent == this && childCount.decrementAndGet() == 0) {
+      if (closed) {
+        close()
+      }
+    }
+  }
+
+  override fun slice(position: Int, size: Int): ByteBuffer {
+    return SplitByteBuffer(this, childCount, agent.slice(position, size))
+  }
+
+  override fun slice(position: Int, size: Int, readPosition: Int, writePosition: Int): ByteBuffer {
+    return SplitByteBuffer(this, childCount, agent.slice(position, size, readPosition, writePosition))
+  }
 
   override fun toString() = "InstantByteBuffer(agent=$agent)"
 }

ts-core/ts-pool/src/main/kotlin/cn/tursom/core/buffer/impl/PooledByteBuffer.kt

@@ -29,8 +29,15 @@ class PooledByteBuffer(
   override val resized get() = agent.resized
 
   override fun close() {
-    if (tryClose()) {
-      if (childCount.get() == 0) {
+    if (tryClose() && childCount.get() == 0) {
+      reference?.cancel()
+      pool.free(this)
+    }
+  }
+
+  override fun closeChild(child: ByteBuffer) {
+    if (child is SplitByteBuffer && child.parent == this && childCount.decrementAndGet() == 0) {
+      if (closed) {
         reference?.cancel()
         pool.free(this)
       }