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// 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_PROXY_ENTER_PROXY_H_
#define PPAPI_PROXY_ENTER_PROXY_H_
#include "base/logging.h"
#include "ppapi/proxy/host_dispatcher.h"
#include "ppapi/proxy/plugin_dispatcher.h"
#include "ppapi/proxy/plugin_resource_tracker.h"
#include "ppapi/thunk/enter.h"
namespace pp {
namespace proxy {
// Wrapper around EnterResourceNoLock that takes a host resource. This is used
// when handling messages in the plugin from the host and we need to convert to
// an object in the plugin side corresponding to that.
//
// This never locks since we assume the host Resource is coming from IPC, and
// never logs errors since we assume the host is doing reasonable things.
template<typename ResourceT>
class EnterPluginFromHostResource
: public ::ppapi::thunk::EnterResourceNoLock<ResourceT> {
public:
EnterPluginFromHostResource(const HostResource& host_resource)
: ::ppapi::thunk::EnterResourceNoLock<ResourceT>(
PluginResourceTracker::GetInstance()->PluginResourceForHostResource(
host_resource),
false) {
// Validate that we're in the plugin rather than the host. Otherwise this
// object will do the wrong thing. In the plugin, the instance should have
// a corresponding plugin dispatcher (assuming the resource is valid).
DCHECK(this->failed() ||
PluginDispatcher::GetForInstance(host_resource.instance()));
}
};
template<typename ResourceT>
class EnterHostFromHostResource
: public ::ppapi::thunk::EnterResourceNoLock<ResourceT> {
public:
EnterHostFromHostResource(const HostResource& host_resource)
: ::ppapi::thunk::EnterResourceNoLock<ResourceT>(
host_resource.host_resource(), false) {
// Validate that we're in the host rather than the plugin. Otherwise this
// object will do the wrong thing. In the host, the instance should have
// a corresponding host disptacher (assuming the resource is valid).
DCHECK(this->failed() ||
HostDispatcher::GetForInstance(host_resource.instance()));
}
};
} // namespace proxy
} // namespace pp
#endif // PPAPI_PROXY_ENTER_PROXY_H_
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