Bug 1221547 - part 1 - enable UnixSocketRawData to take ownership of a passed-in-buffer; r=tzimmerman

ipc/unixsocket/SocketBase.cpp

@@ -125,6 +125,15 @@ UnixSocketRawData::UnixSocketRawData(const void* aData, size_t aSize)
               0, aSize, aSize);
 }
 
+UnixSocketRawData::UnixSocketRawData(UniquePtr<uint8_t[]> aData, size_t aSize)
+{
+  MOZ_ASSERT(aData || !aSize);
+
+  MOZ_COUNT_CTOR_INHERITED(UnixSocketRawData, UnixSocketIOBuffer);
+
+  ResetBuffer(aData.release(), 0, aSize, aSize);
+}
+
 UnixSocketRawData::UnixSocketRawData(size_t aSize)
 {
   MOZ_COUNT_CTOR_INHERITED(UnixSocketRawData, UnixSocketIOBuffer);

ipc/unixsocket/SocketBase.h

@@ -11,6 +11,7 @@
 
 #include "base/message_loop.h"
 #include "nsAutoPtr.h"
+#include "mozilla/UniquePtr.h"
 
 namespace mozilla {
 namespace ipc {
@@ -230,6 +231,15 @@ public:
    */
   UnixSocketRawData(const void* aData, size_t aSize);
 
+  /**
+   * This constructor takes ownership of the data in aData.  The
+   * data is assumed to be aSize bytes in length.
+   *
+   * @param aData The buffer to take ownership of.
+   * @param aSize The number of bytes in |aData|.
+   */
+  UnixSocketRawData(UniquePtr<uint8_t[]> aData, size_t aSize);
+
   /**
    * This constructor reserves aSize bytes of space. Currently
    * it's only possible to fill this buffer by calling |Receive|.