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// Copyright (c) 2012 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.
#include "ppapi/proxy/host_var_serialization_rules.h"
#include "ppapi/shared_impl/ppapi_globals.h"
#include "ppapi/shared_impl/var_tracker.h"
using ppapi::PpapiGlobals;
using ppapi::VarTracker;
namespace ppapi {
namespace proxy {
HostVarSerializationRules::HostVarSerializationRules() {
}
HostVarSerializationRules::~HostVarSerializationRules() {
}
PP_Var HostVarSerializationRules::SendCallerOwned(const PP_Var& var) {
return var;
}
PP_Var HostVarSerializationRules::BeginReceiveCallerOwned(const PP_Var& var) {
return var;
}
void HostVarSerializationRules::EndReceiveCallerOwned(const PP_Var& var) {
if (var.type != PP_VARTYPE_OBJECT && var.type >= PP_VARTYPE_STRING) {
// Release our reference to the local Var.
PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(var);
}
}
PP_Var HostVarSerializationRules::ReceivePassRef(const PP_Var& var) {
// See PluginVarSerialization::BeginSendPassRef for an example.
if (var.type == PP_VARTYPE_OBJECT)
PpapiGlobals::Get()->GetVarTracker()->AddRefVar(var);
return var;
}
PP_Var HostVarSerializationRules::BeginSendPassRef(const PP_Var& var) {
return var;
}
void HostVarSerializationRules::EndSendPassRef(const PP_Var& var) {
// See PluginVarSerializationRules::ReceivePassRef for an example. We don't
// need to do anything here for "Object" vars; we continue holding one ref on
// behalf of the plugin.
if (var.type != PP_VARTYPE_OBJECT) {
// But for other ref-counted types (like String, Array, and Dictionary),
// the value will be re-constituted on the other side as a new Var with no
// connection to the host-side reference counting. We must therefore release
// our reference count; this is roughly equivalent to passing the ref to the
// plugin.
PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(var);
}
}
void HostVarSerializationRules::ReleaseObjectRef(const PP_Var& var) {
PpapiGlobals::Get()->GetVarTracker()->ReleaseVar(var);
}
} // namespace proxy
} // namespace ppapi
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