Add m-esr52 at 52.6.0

1 files changed, 77 insertions, 0 deletions

diff --git a/gfx/ipc/SharedDIB.cpp b/gfx/ipc/SharedDIB.cpp
new file mode 100644
index 0000000000..ec68a61fa2
--- /dev/null
+++ b/gfx/ipc/SharedDIB.cpp
@@ -0,0 +1,77 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+#include "SharedDIB.h"
+
+namespace mozilla {
+namespace gfx {
+
+SharedDIB::SharedDIB() :
+  mShMem(nullptr)
+{
+}
+
+SharedDIB::~SharedDIB()
+{
+  Close();
+}
+
+nsresult
+SharedDIB::Create(uint32_t aSize)
+{
+  Close();
+
+  mShMem = new base::SharedMemory();
+  if (!mShMem || !mShMem->Create("", false, false, aSize))
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  return NS_OK;
+}
+
+bool
+SharedDIB::IsValid()
+{
+  if (!mShMem)
+    return false;
+
+  return mShMem->IsHandleValid(mShMem->handle());
+}
+
+nsresult
+SharedDIB::Close()
+{
+  delete mShMem;
+
+  mShMem = nullptr;
+
+  return NS_OK;
+}
+
+nsresult
+SharedDIB::Attach(Handle aHandle, uint32_t aSize)
+{
+  Close();
+
+  mShMem = new base::SharedMemory(aHandle, false);
+  if(!mShMem)
+    return NS_ERROR_OUT_OF_MEMORY;
+
+  return NS_OK;
+}
+
+nsresult
+SharedDIB::ShareToProcess(base::ProcessId aTargetPid, Handle *aNewHandle)
+{
+  if (!mShMem)
+    return NS_ERROR_UNEXPECTED;
+
+  if (!mShMem->ShareToProcess(aTargetPid, aNewHandle))
+    return NS_ERROR_UNEXPECTED;
+
+  return NS_OK;
+}
+
+} // namespace gfx
+} // namespace mozilla