blob: 0f3a11f84f277136525dae893b35c9f3b2fc50b8 [file] [log] [blame]
// 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 <list>
#include "content/common/content_export.h"
namespace IPC {
class Message;
namespace content {
class BrowserChildProcessHostDelegate;
class BrowserChildProcessHostImpl;
struct ChildProcessData;
class ChildProcessHost;
// 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 {
explicit BrowserChildProcessHostIterator(int 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();
ChildProcessHost* GetHost();
bool all_;
int process_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 {
explicit BrowserChildProcessHostTypeIterator(int process_type)
: BrowserChildProcessHostIterator(process_type) {}
T* operator->() {
return static_cast<T*>(GetDelegate());
T* operator*() {
return static_cast<T*>(GetDelegate());
}; // namespace content