Cloning a bunch of stuff from the native_client repository at r6528

ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.cc

Index: ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.cc
===================================================================
--- ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.cc	(revision 0)
+++ ppapi/native_client/src/shared/ppapi_proxy/plugin_instance_data.cc	(revision 0)
@@ -0,0 +1,55 @@
+/*
+ * Copyright 2011 The Native Client Authors. All rights reserved.
+ * Use of this source code is governed by a BSD-style license that can
+ * be found in the LICENSE file.
+ */
+
+#include "native_client/src/shared/ppapi_proxy/plugin_instance_data.h"
+
+#include <tr1/unordered_map>
+
+namespace ppapi_proxy {
+
+namespace {
+
+typedef std::tr1::unordered_map<PP_Instance, PluginInstanceData*> InstanceMap;
+
+InstanceMap& GetInstanceMap() {
+  static InstanceMap map;
+  return map;
+}
+
+}  // namespace
+
+// static
+PluginInstanceData* PluginInstanceData::FromPP(PP_Instance id) {
+  InstanceMap& map = GetInstanceMap();
+  InstanceMap::iterator i = map.find(id);
+
+  return map.end() == i ? NULL : i->second;
+}
+
+// static
+void PluginInstanceData::DidCreate(PP_Instance id) {
+  InstanceMap& map = GetInstanceMap();
+  // TODO(neb): figure out how to use CHECK in NaCl land.
+//  CHECK(map.end() == map.find(id));
+  map[id] = new PluginInstanceData(id);
+}
+
+// static
+void PluginInstanceData::DidDestroy(PP_Instance id) {
+  GetInstanceMap().erase(id);
+}
+
+// static
+void PluginInstanceData::DidChangeView(PP_Instance id,
+                                       PP_Rect position,
+                                       PP_Rect clip) {
+  PluginInstanceData* instance = FromPP(id);
+  if (instance) {
+    instance->set_position(position);
+  }
+}
+
+}  // namespace ppapi_proxy