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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.
#ifndef CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_ITERATOR_H_
#define CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_ITERATOR_H_
#pragma once
#include <list>
#include "content/common/content_export.h"
#include "content/public/common/process_type.h"
class BrowserChildProcessHostImpl;
namespace IPC {
class Message;
}
namespace content {
class BrowserChildProcessHostDelegate;
struct ChildProcessData;
// This class allows iteration through either all child processes, or ones of a
// specific type, depending on which constructor is used. Note that this should
// be done from the IO thread and that the iterator should not be kept around as
// it may be invalidated on subsequent event processing in the event loop.
class CONTENT_EXPORT BrowserChildProcessHostIterator {
public:
BrowserChildProcessHostIterator();
explicit BrowserChildProcessHostIterator(content::ProcessType type);
// These methods work on the current iterator object. Only call them if
// Done() returns false.
bool operator++();
bool Done();
const ChildProcessData& GetData();
bool Send(IPC::Message* message);
BrowserChildProcessHostDelegate* GetDelegate();
private:
bool all_;
content::ProcessType type_;
std::list<BrowserChildProcessHostImpl*>::iterator iterator_;
};
// Helper class so that subclasses of BrowserChildProcessHostDelegate can be
// iterated with no casting needing. Note that because of the components build,
// this class can only be used by BCPHD implementations that live in content,
// otherwise link errors will result.
template <class T>
class CONTENT_EXPORT BrowserChildProcessHostTypeIterator
: public BrowserChildProcessHostIterator {
public:
explicit BrowserChildProcessHostTypeIterator(content::ProcessType type)
: BrowserChildProcessHostIterator(type) {}
T* operator->() {
return static_cast<T*>(GetDelegate());
}
T* operator*() {
return static_cast<T*>(GetDelegate());
}
};
}; // namespace content
#endif // CONTENT_PUBLIC_BROWSER_BROWSER_CHILD_PROCESS_HOST_ITERATOR_H_
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