From 6f8885bc143460d77f300a981169e0487ff923c1 Mon Sep 17 00:00:00 2001
From: Adam Lesinski <adamlesinski@google.com>
Date: Tue, 22 Sep 2015 18:42:19 -0700
Subject: [PATCH] Implement C++11 move semantics for android::FileMap

FileMaps should be movable, thereby not requiring them to be only used
with a unique_ptr as they currently are.

Change-Id: I0fb8013bf398a2ced5420d85ba888c2a7fc5a496
---
 include/utils/FileMap.h |  3 +++
 libutils/FileMap.cpp    | 37 +++++++++++++++++++++++++++++++++++++
 2 files changed, 40 insertions(+)

diff --git a/include/utils/FileMap.h b/include/utils/FileMap.h
index afd7bfd7b..7d372e1dc 100644
--- a/include/utils/FileMap.h
+++ b/include/utils/FileMap.h
@@ -52,6 +52,9 @@ class FileMap {
 public:
     FileMap(void);
 
+    FileMap(FileMap&& f);
+    FileMap& operator=(FileMap&& f);
+
     /*
      * Create a new mapping on an open file.
      *
diff --git a/libutils/FileMap.cpp b/libutils/FileMap.cpp
index 91e45d873..4f4b8895a 100644
--- a/libutils/FileMap.cpp
+++ b/libutils/FileMap.cpp
@@ -53,6 +53,43 @@ FileMap::FileMap(void)
 {
 }
 
+// Move Constructor.
+FileMap::FileMap(FileMap&& other)
+    : mFileName(other.mFileName), mBasePtr(other.mBasePtr), mBaseLength(other.mBaseLength),
+      mDataOffset(other.mDataOffset), mDataPtr(other.mDataPtr), mDataLength(other.mDataLength)
+#if defined(__MINGW32__)
+      , mFileHandle(other.mFileHandle), mFileMapping(other.mFileMapping)
+#endif
+{
+    other.mFileName = NULL;
+    other.mBasePtr = NULL;
+    other.mDataPtr = NULL;
+#if defined(__MINGW32__)
+    other.mFileHandle = 0;
+    other.mFileMapping = 0;
+#endif
+}
+
+// Move assign operator.
+FileMap& FileMap::operator=(FileMap&& other) {
+    mFileName = other.mFileName;
+    mBasePtr = other.mBasePtr;
+    mBaseLength = other.mBaseLength;
+    mDataOffset = other.mDataOffset;
+    mDataPtr = other.mDataPtr;
+    mDataLength = other.mDataLength;
+    other.mFileName = NULL;
+    other.mBasePtr = NULL;
+    other.mDataPtr = NULL;
+#if defined(__MINGW32__)
+    mFileHandle = other.mFileHandle;
+    mFileMapping = other.mFileMapping;
+    other.mFileHandle = 0;
+    other.mFileMapping = 0;
+#endif
+    return *this;
+}
+
 // Destructor.
 FileMap::~FileMap(void)
 {