import quincy 17.2.0

[ceph.git] / ceph / src / arrow / java / adapter / orc / src / main / java / org / apache / arrow / adapter / orc / OrcMemoryJniWrapper.java

diff --git a/ceph/src/arrow/java/adapter/orc/src/main/java/org/apache/arrow/adapter/orc/OrcMemoryJniWrapper.java b/ceph/src/arrow/java/adapter/orc/src/main/java/org/apache/arrow/adapter/orc/OrcMemoryJniWrapper.java
new file mode 100644 (file)
index 0000000..473e831
--- /dev/null
+++ b/ceph/src/arrow/java/adapter/orc/src/main/java/org/apache/arrow/adapter/orc/OrcMemoryJniWrapper.java
@@ -0,0 +1,77 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.arrow.adapter.orc;
+
+/**
+ * Wrapper for orc memory allocated by native code.
+ */
+class OrcMemoryJniWrapper implements AutoCloseable {
+
+  private final long nativeInstanceId;
+
+  private final long memoryAddress;
+
+  private final long size;
+
+  private final long capacity;
+
+  /**
+   * Construct a new instance.
+   * @param nativeInstanceId unique id of the underlying memory.
+   * @param memoryAddress starting memory address of the underlying memory.
+   * @param size size of the valid data.
+   * @param capacity allocated memory size.
+   */
+  OrcMemoryJniWrapper(long nativeInstanceId, long memoryAddress, long size, long capacity) {
+    this.nativeInstanceId = nativeInstanceId;
+    this.memoryAddress = memoryAddress;
+    this.size = size;
+    this.capacity = capacity;
+  }
+
+  /**
+   * Return the size of underlying chunk of memory that has valid data.
+   * @return valid data size
+   */
+  long getSize() {
+    return size;
+  }
+
+  /**
+   * Return the size of underlying chunk of memory managed by this OrcMemoryJniWrapper.
+   * @return underlying memory size
+   */
+  long getCapacity() {
+    return capacity;
+  }
+
+  /**
+   * Return the memory address of underlying chunk of memory.
+   * @return memory address
+   */
+  long getMemoryAddress() {
+    return memoryAddress;
+  }
+
+  @Override
+  public void close() {
+    release(nativeInstanceId);
+  }
+
+  private native void release(long id);
+}