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/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* vim: set ts=8 sts=2 et sw=2 tw=80: */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#ifndef mozilla_ipc_IOThreadParent_h
#define mozilla_ipc_IOThreadParent_h
#include "base/thread.h"
#include "chrome/common/ipc_channel.h"
#include "mozilla/ipc/ScopedPort.h"
namespace mozilla::ipc {
// Abstract background thread used for IPC I/O.
class IOThread : private base::Thread {
public:
// Lifecycle Note: The IOThread is stored in a static, and is returned by raw
// pointer here from potentially any thread. This is OK because the IOThread
// is very long lived, and should outlive any other thread which would
// reference it (other than the main thread, which is responsible for the
// lifetime of the IO Thread).
static IOThread* Get() { return sSingleton; }
// Called during XPCOM component startup and shutdown.
static void Startup();
static void Shutdown();
// Get the nsISerialEventTarget which should be used to dispatch events to run
// on the IOThreadBase.
nsISerialEventTarget* GetEventTarget() {
return base::Thread::message_loop()->SerialEventTarget();
}
protected:
IOThread(const char* aName);
~IOThread();
// Called by subclasses in the constructor/destructor to start/join the target
// thread. This cannot be done in the base class constructor/destructor, as
// the virtual Init()/CleanUp() methods need to be available.
void StartThread();
void StopThread();
// Init() and Cleanup() methods which will be invoked on the IOThread when the
// IOThread is started/stopped.
void Init() override = 0;
void CleanUp() override = 0;
private:
static IOThread* sSingleton;
};
// Background I/O thread used by the parent process.
class IOThreadParent : public IOThread {
protected:
void Init() override;
void CleanUp() override;
private:
friend class IOThread;
IOThreadParent();
~IOThreadParent();
const IPC::Channel::ChannelKind* mChannelKind;
};
// Background I/O thread used by the child process.
class IOThreadChild : public IOThread {
public:
IOThreadChild(IPC::Channel::ChannelHandle aClientHandle,
base::ProcessId aParentPid);
~IOThreadChild();
mozilla::ipc::ScopedPort TakeInitialPort() { return std::move(mInitialPort); }
protected:
void Init() override;
void CleanUp() override;
private:
mozilla::ipc::ScopedPort mInitialPort;
IPC::Channel::ChannelHandle mClientHandle;
base::ProcessId mParentPid;
};
inline void AssertIOThread() {
MOZ_ASSERT(MessageLoop::TYPE_IO == MessageLoop::current()->type(),
"should be on the IO thread!");
}
} // namespace mozilla::ipc
#endif // mozilla_ipc_IOThreadParent_h
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