Merge from Chromium at DEPS revision r167172
This commit was generated by merge_to_master.py.
Change-Id: Ib8d56fd5ae39a2d7e8c91dcd76cc6d13f25f2aab
diff --git a/ppapi/shared_impl/host_resource.h b/ppapi/shared_impl/host_resource.h
new file mode 100644
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+++ b/ppapi/shared_impl/host_resource.h
@@ -0,0 +1,61 @@
+// Copyright (c) 2011 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef PPAPI_SHARED_IMPL_HOST_RESOURCE_H_
+#define PPAPI_SHARED_IMPL_HOST_RESOURCE_H_
+
+#include "ppapi/c/pp_instance.h"
+#include "ppapi/c/pp_resource.h"
+#include "ppapi/shared_impl/ppapi_shared_export.h"
+
+namespace ppapi {
+
+// Represents a PP_Resource sent over the wire. This just wraps a PP_Resource.
+// The point is to prevent mistakes where the wrong resource value is sent.
+// Resource values are remapped in the plugin so that it can talk to multiple
+// hosts. If all values were PP_Resource, it would be easy to forget to do
+// this tranformation.
+//
+// All HostResources respresent IDs valid in the host.
+class PPAPI_SHARED_EXPORT HostResource {
+ public:
+ HostResource();
+
+ bool is_null() const {
+ return !host_resource_;
+ }
+
+ // Some resources are plugin-side only and don't have a corresponding
+ // resource in the host. Yet these resources still need an instance to be
+ // associated with. This function creates a HostResource with the given
+ // instances and a 0 host resource ID for these cases.
+ static HostResource MakeInstanceOnly(PP_Instance instance);
+
+ // Sets and retrieves the internal PP_Resource which is valid for the host
+ // (a.k.a. renderer, as opposed to the plugin) process.
+ //
+ // DO NOT CALL THESE FUNCTIONS IN THE PLUGIN SIDE OF THE PROXY. The values
+ // will be invalid. See the class comment above.
+ void SetHostResource(PP_Instance instance, PP_Resource resource);
+ PP_Resource host_resource() const {
+ return host_resource_;
+ }
+
+ PP_Instance instance() const { return instance_; }
+
+ // This object is used in maps so we need to provide this sorting operator.
+ bool operator<(const HostResource& other) const {
+ if (instance_ != other.instance_)
+ return instance_ < other.instance_;
+ return host_resource_ < other.host_resource_;
+ }
+
+ private:
+ PP_Instance instance_;
+ PP_Resource host_resource_;
+};
+
+} // namespace ppapi
+
+#endif // PPAPI_SHARED_IMPL_HOST_RESOURCE_H_
