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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 CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
#define CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
#pragma once
#include <queue>
#include "base/basictypes.h"
#include "base/file_path.h"
#include "base/memory/scoped_ptr.h"
#include "base/memory/ref_counted.h"
#include "content/browser/browser_child_process_host.h"
#include "content/browser/renderer_host/pepper_message_filter.h"
namespace content {
struct PepperPluginInfo;
class ResourceContext;
}
namespace net {
class HostResolver;
}
// Process host for PPAPI plugin and broker processes.
// When used for the broker, interpret all references to "plugin" with "broker".
class PpapiPluginProcessHost
: public BrowserChildProcessHost {
public:
class Client {
public:
// Gets the information about the renderer that's requesting the channel.
virtual void GetChannelInfo(base::ProcessHandle* renderer_handle,
int* renderer_id) = 0;
// Called when the channel is asynchronously opened to the plugin or on
// error. On error, the parameters should be:
// base::kNullProcessHandle
// IPC::ChannelHandle()
virtual void OnChannelOpened(base::ProcessHandle plugin_process_handle,
const IPC::ChannelHandle& channel_handle) = 0;
};
class PluginClient : public Client {
public:
// Returns the resource context for the renderer requesting the channel.
virtual const content::ResourceContext* GetResourceContext() = 0;
};
class BrokerClient : public Client {
};
virtual ~PpapiPluginProcessHost();
static PpapiPluginProcessHost* CreatePluginHost(
const content::PepperPluginInfo& info,
net::HostResolver* host_resolver);
static PpapiPluginProcessHost* CreateBrokerHost(
const content::PepperPluginInfo& info);
// Opens a new channel to the plugin. The client will be notified when the
// channel is ready or if there's an error.
void OpenChannelToPlugin(Client* client);
const FilePath& plugin_path() const { return plugin_path_; }
// The client pointer must remain valid until its callback is issued.
private:
class PluginNetworkObserver;
// Constructors for plugin and broker process hosts, respectively.
// You must call Init before doing anything else.
PpapiPluginProcessHost(net::HostResolver* host_resolver);
PpapiPluginProcessHost();
// Actually launches the process with the given plugin info. Returns true
// on success (the process was spawned).
bool Init(const content::PepperPluginInfo& info);
void RequestPluginChannel(Client* client);
virtual void OnProcessLaunched() OVERRIDE;
virtual bool OnMessageReceived(const IPC::Message& msg) OVERRIDE;
virtual void OnChannelConnected(int32 peer_pid) OVERRIDE;
virtual void OnChannelError() OVERRIDE;
void CancelRequests();
// IPC message handlers.
void OnRendererPluginChannelCreated(const IPC::ChannelHandle& handle);
// Handles most requests from the plugin. May be NULL.
scoped_refptr<PepperMessageFilter> filter_;
// Observes network changes. May be NULL.
scoped_ptr<PluginNetworkObserver> network_observer_;
// Channel requests that we are waiting to send to the plugin process once
// the channel is opened.
std::vector<Client*> pending_requests_;
// Channel requests that we have already sent to the plugin process, but
// haven't heard back about yet.
std::queue<Client*> sent_requests_;
// Path to the plugin library.
FilePath plugin_path_;
const bool is_broker_;
// The unique id created for the process.
int process_id_;
DISALLOW_COPY_AND_ASSIGN(PpapiPluginProcessHost);
};
#endif // CONTENT_BROWSER_PPAPI_PLUGIN_PROCESS_HOST_H_
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