Bug 870676: Part 2 - Implement IPDL for mozFMRadio. r=khuey

dom/fmradio/ipc/FMRadioChild.cpp

@@ -0,0 +1,182 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=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/. */
+
+#include "FMRadioChild.h"
+#include "mozilla/dom/ContentChild.h"
+#include "mozilla/dom/FMRadioRequestChild.h"
+
+using namespace mozilla::hal;
+
+BEGIN_FMRADIO_NAMESPACE
+
+StaticAutoPtr<FMRadioChild> FMRadioChild::sFMRadioChild;
+
+FMRadioChild::FMRadioChild()
+  : mEnabled(false)
+  , mFrequency(0)
+  , mObserverList(FMRadioEventObserverList())
+{
+  MOZ_COUNT_CTOR(FMRadioChild);
+
+  ContentChild::GetSingleton()->SendPFMRadioConstructor(this);
+
+  StatusInfo statusInfo;
+  SendGetStatusInfo(&statusInfo);
+
+  mEnabled = statusInfo.enabled();
+  mFrequency = statusInfo.frequency();
+  mUpperBound = statusInfo.upperBound();
+  mLowerBound= statusInfo.lowerBound();
+  mChannelWidth = statusInfo.channelWidth();
+}
+
+FMRadioChild::~FMRadioChild()
+{
+  MOZ_COUNT_DTOR(FMRadioChild);
+}
+
+bool
+FMRadioChild::IsEnabled() const
+{
+  return mEnabled;
+}
+
+double
+FMRadioChild::GetFrequency() const
+{
+  return mFrequency;
+}
+
+
+double
+FMRadioChild::GetFrequencyUpperBound() const
+{
+  return mUpperBound;
+}
+
+double
+FMRadioChild::GetFrequencyLowerBound() const
+{
+  return mLowerBound;
+}
+
+double
+FMRadioChild::GetChannelWidth() const
+{
+  return mChannelWidth;
+}
+
+void
+FMRadioChild::Enable(double aFrequency, ReplyRunnable* aReplyRunnable)
+{
+  SendRequest(aReplyRunnable, EnableRequestArgs(aFrequency));
+}
+
+void
+FMRadioChild::Disable(ReplyRunnable* aReplyRunnable)
+{
+  SendRequest(aReplyRunnable, DisableRequestArgs());
+}
+
+void
+FMRadioChild::SetFrequency(double aFrequency,
+                                  ReplyRunnable* aReplyRunnable)
+{
+  SendRequest(aReplyRunnable, SetFrequencyRequestArgs(aFrequency));
+}
+
+void
+FMRadioChild::Seek(FMRadioSeekDirection aDirection, ReplyRunnable* aReplyRunnable)
+{
+  SendRequest(aReplyRunnable, SeekRequestArgs(aDirection));
+}
+
+void
+FMRadioChild::CancelSeek(ReplyRunnable* aReplyRunnable)
+{
+  SendRequest(aReplyRunnable, CancelSeekRequestArgs());
+}
+
+inline void
+FMRadioChild::NotifyFMRadioEvent(FMRadioEventType aType)
+{
+  mObserverList.Broadcast(aType);
+}
+
+void
+FMRadioChild::AddObserver(FMRadioEventObserver* aObserver)
+{
+  mObserverList.AddObserver(aObserver);
+}
+
+void
+FMRadioChild::RemoveObserver(FMRadioEventObserver* aObserver)
+{
+  mObserverList.RemoveObserver(aObserver);
+}
+
+void
+FMRadioChild::SendRequest(ReplyRunnable* aReplyRunnable,
+                                 FMRadioRequestArgs aArgs)
+{
+  PFMRadioRequestChild* childRequest = new FMRadioRequestChild(aReplyRunnable);
+  SendPFMRadioRequestConstructor(childRequest, aArgs);
+}
+
+bool
+FMRadioChild::RecvNotifyFrequencyChanged(const double& aFrequency)
+{
+  mFrequency = aFrequency;
+  NotifyFMRadioEvent(FrequencyChanged);
+  return true;
+}
+
+bool
+FMRadioChild::RecvNotifyEnabledChanged(const bool& aEnabled,
+                                       const double& aFrequency)
+{
+  mEnabled = aEnabled;
+  mFrequency = aFrequency;
+  NotifyFMRadioEvent(EnabledChanged);
+  return true;
+}
+
+bool
+FMRadioChild::Recv__delete__()
+{
+  return true;
+}
+
+PFMRadioRequestChild*
+FMRadioChild::AllocPFMRadioRequestChild(const FMRadioRequestArgs& aArgs)
+{
+  MOZ_CRASH();
+  return nullptr;
+}
+
+bool
+FMRadioChild::DeallocPFMRadioRequestChild(PFMRadioRequestChild* aActor)
+{
+  delete aActor;
+  return true;
+}
+
+// static
+FMRadioChild*
+FMRadioChild::Singleton()
+{
+  MOZ_ASSERT(XRE_GetProcessType() != GeckoProcessType_Default);
+  MOZ_ASSERT(NS_IsMainThread());
+
+  if (!sFMRadioChild) {
+    sFMRadioChild = new FMRadioChild();
+  }
+
+  return sFMRadioChild;
+}
+
+END_FMRADIO_NAMESPACE
+

dom/fmradio/ipc/FMRadioChild.h

@@ -0,0 +1,91 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=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_dom_fmradiochild_h__
+#define mozilla_dom_fmradiochild_h__
+
+#include "FMRadioCommon.h"
+#include "FMRadioService.h"
+#include "mozilla/dom/PFMRadioChild.h"
+#include "mozilla/StaticPtr.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+/**
+ * FMRadioChild plays two roles:
+ *   - Kind of proxy of FMRadioService
+ *     Redirect all the requests  coming from web content to FMRadioService
+ *     in parent through IPC channel.
+ *   - Child Actor of PFMRadio
+ *     IPC channel to transfer the requests.
+ */
+class FMRadioChild MOZ_FINAL : public IFMRadioService
+                             , public PFMRadioChild
+{
+public:
+  static FMRadioChild* Singleton();
+  ~FMRadioChild();
+
+  void SendRequest(ReplyRunnable* aReplyRunnable, FMRadioRequestArgs aArgs);
+
+  /* IFMRadioService */
+  virtual bool IsEnabled() const MOZ_OVERRIDE;
+  virtual double GetFrequency() const MOZ_OVERRIDE;
+  virtual double GetFrequencyUpperBound() const MOZ_OVERRIDE;
+  virtual double GetFrequencyLowerBound() const MOZ_OVERRIDE;
+  virtual double GetChannelWidth() const MOZ_OVERRIDE;
+
+  virtual void Enable(double aFrequency, ReplyRunnable* aReplyRunnable) MOZ_OVERRIDE;
+  virtual void Disable(ReplyRunnable* aReplyRunnable) MOZ_OVERRIDE;
+  virtual void SetFrequency(double frequency,
+                            ReplyRunnable* aReplyRunnable) MOZ_OVERRIDE;
+  virtual void Seek(mozilla::hal::FMRadioSeekDirection aDirection,
+                    ReplyRunnable* aReplyRunnable) MOZ_OVERRIDE;
+  virtual void CancelSeek(ReplyRunnable* aReplyRunnable) MOZ_OVERRIDE;
+
+  virtual void AddObserver(FMRadioEventObserver* aObserver) MOZ_OVERRIDE;
+  virtual void RemoveObserver(FMRadioEventObserver* aObserver) MOZ_OVERRIDE;
+
+  /* PFMRadioChild */
+  virtual bool
+  Recv__delete__() MOZ_OVERRIDE;
+
+  virtual bool
+  RecvNotifyFrequencyChanged(const double& aFrequency) MOZ_OVERRIDE;
+
+  virtual bool
+  RecvNotifyEnabledChanged(const bool& aEnabled,
+                           const double& aFrequency) MOZ_OVERRIDE;
+
+  virtual PFMRadioRequestChild*
+  AllocPFMRadioRequestChild(const FMRadioRequestArgs& aArgs) MOZ_OVERRIDE;
+
+  virtual bool
+  DeallocPFMRadioRequestChild(PFMRadioRequestChild* aActor) MOZ_OVERRIDE;
+
+private:
+  FMRadioChild();
+
+  void Init();
+
+  inline void NotifyFMRadioEvent(FMRadioEventType aType);
+
+  bool mEnabled;
+  double mFrequency;
+  double mUpperBound;
+  double mLowerBound;
+  double mChannelWidth;
+
+  FMRadioEventObserverList mObserverList;
+
+private:
+  static StaticAutoPtr<FMRadioChild> sFMRadioChild;
+};
+
+END_FMRADIO_NAMESPACE
+
+#endif // mozilla_dom_fmradiochild_h__
+

dom/fmradio/ipc/FMRadioParent.cpp

@@ -0,0 +1,101 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "FMRadioParent.h"
+#include "mozilla/unused.h"
+#include "mozilla/dom/ContentParent.h"
+#include "FMRadioRequestParent.h"
+#include "FMRadioService.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+FMRadioParent::FMRadioParent()
+{
+  MOZ_COUNT_CTOR(FMRadioParent);
+
+  IFMRadioService::Singleton()->AddObserver(this);
+}
+
+FMRadioParent::~FMRadioParent()
+{
+  MOZ_COUNT_DTOR(FMRadioParent);
+
+  IFMRadioService::Singleton()->RemoveObserver(this);
+}
+
+bool
+FMRadioParent::RecvGetStatusInfo(StatusInfo* aStatusInfo)
+{
+  aStatusInfo->enabled() = IFMRadioService::Singleton()->IsEnabled();
+  aStatusInfo->frequency() = IFMRadioService::Singleton()->GetFrequency();
+  aStatusInfo->upperBound() =
+    IFMRadioService::Singleton()->GetFrequencyUpperBound();
+  aStatusInfo->lowerBound() =
+    IFMRadioService::Singleton()->GetFrequencyLowerBound();
+  aStatusInfo->channelWidth() =
+    IFMRadioService::Singleton()->GetChannelWidth();
+  return true;
+}
+
+PFMRadioRequestParent*
+FMRadioParent::AllocPFMRadioRequestParent(const FMRadioRequestArgs& aArgs)
+{
+  nsRefPtr<FMRadioRequestParent> requestParent = new FMRadioRequestParent();
+
+  switch (aArgs.type()) {
+    case FMRadioRequestArgs::TEnableRequestArgs:
+      IFMRadioService::Singleton()->Enable(
+        aArgs.get_EnableRequestArgs().frequency(), requestParent);
+      break;
+    case FMRadioRequestArgs::TDisableRequestArgs:
+      IFMRadioService::Singleton()->Disable(requestParent);
+      break;
+    case FMRadioRequestArgs::TSetFrequencyRequestArgs:
+      IFMRadioService::Singleton()->SetFrequency(
+        aArgs.get_SetFrequencyRequestArgs().frequency(), requestParent);
+      break;
+    case FMRadioRequestArgs::TSeekRequestArgs:
+      IFMRadioService::Singleton()->Seek(
+        aArgs.get_SeekRequestArgs().direction(), requestParent);
+      break;
+    case FMRadioRequestArgs::TCancelSeekRequestArgs:
+      IFMRadioService::Singleton()->CancelSeek(requestParent);
+      break;
+    default:
+      MOZ_CRASH();
+  }
+
+  return requestParent.forget().get();
+}
+
+bool
+FMRadioParent::DeallocPFMRadioRequestParent(PFMRadioRequestParent* aActor)
+{
+  FMRadioRequestParent* parent = static_cast<FMRadioRequestParent*>(aActor);
+  NS_RELEASE(parent);
+  return true;
+}
+
+void
+FMRadioParent::Notify(const FMRadioEventType& aType)
+{
+  switch (aType) {
+    case FrequencyChanged:
+      unused << SendNotifyFrequencyChanged(
+        IFMRadioService::Singleton()->GetFrequency());
+      break;
+    case EnabledChanged:
+      unused << SendNotifyEnabledChanged(
+        IFMRadioService::Singleton()->IsEnabled(),
+        IFMRadioService::Singleton()->GetFrequency());
+      break;
+    default:
+      NS_RUNTIMEABORT("not reached");
+      break;
+  }
+}
+
+END_FMRADIO_NAMESPACE
+

dom/fmradio/ipc/FMRadioParent.h

@@ -0,0 +1,41 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=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_dom_fmradioparent_h__
+#define mozilla_dom_fmradioparent_h__
+
+#include "FMRadioCommon.h"
+#include "mozilla/dom/PFMRadioParent.h"
+#include "mozilla/HalTypes.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+class PFMRadioRequestParent;
+
+class FMRadioParent MOZ_FINAL : public PFMRadioParent
+                              , public FMRadioEventObserver
+{
+public:
+  FMRadioParent();
+  ~FMRadioParent();
+
+  virtual bool
+  RecvGetStatusInfo(StatusInfo* aStatusInfo) MOZ_OVERRIDE;
+
+  virtual PFMRadioRequestParent*
+  AllocPFMRadioRequestParent(const FMRadioRequestArgs& aArgs) MOZ_OVERRIDE;
+
+  virtual bool
+  DeallocPFMRadioRequestParent(PFMRadioRequestParent* aActor) MOZ_OVERRIDE;
+
+  /* FMRadioEventObserver */
+  virtual void Notify(const FMRadioEventType& aType) MOZ_OVERRIDE;
+};
+
+END_FMRADIO_NAMESPACE
+
+#endif // mozilla_dom_fmradioparent_h__
+

dom/fmradio/ipc/FMRadioRequestChild.cpp

@@ -0,0 +1,33 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "mozilla/dom/PFMRadioRequestChild.h"
+#include "FMRadioRequestChild.h"
+#include "FMRadioService.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+FMRadioRequestChild::FMRadioRequestChild(ReplyRunnable* aReplyRunnable)
+  : mReplyRunnable(aReplyRunnable)
+{
+  MOZ_COUNT_CTOR(FMRadioRequestChild);
+}
+
+FMRadioRequestChild::~FMRadioRequestChild()
+{
+  MOZ_COUNT_DTOR(FMRadioRequestChild);
+}
+
+bool
+FMRadioRequestChild::Recv__delete__(const FMRadioResponseType& aType)
+{
+  mReplyRunnable->SetReply(aType);
+  NS_DispatchToMainThread(mReplyRunnable);
+
+  return true;
+}
+
+END_FMRADIO_NAMESPACE
+

dom/fmradio/ipc/FMRadioRequestChild.h

@@ -0,0 +1,34 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=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_dom_fmradiorequestchild_h__
+#define mozilla_dom_fmradiorequestchild_h__
+
+#include "FMRadioCommon.h"
+#include "mozilla/dom/PFMRadioRequestChild.h"
+#include "DOMRequest.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+class ReplyRunnable;
+
+class FMRadioRequestChild MOZ_FINAL : public PFMRadioRequestChild
+{
+public:
+  FMRadioRequestChild(ReplyRunnable* aReplyRunnable);
+  ~FMRadioRequestChild();
+
+  virtual bool
+  Recv__delete__(const FMRadioResponseType& aResponse) MOZ_OVERRIDE;
+
+private:
+  nsRefPtr<ReplyRunnable> mReplyRunnable;
+};
+
+END_FMRADIO_NAMESPACE
+
+#endif // mozilla_dom_fmradiorequestchild_h__
+

dom/fmradio/ipc/FMRadioRequestParent.cpp

@@ -0,0 +1,43 @@
+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/* 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/. */
+
+#include "FMRadioRequestParent.h"
+#include "FMRadioService.h"
+#include "mozilla/unused.h"
+#include "mozilla/dom/PFMRadio.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+FMRadioRequestParent::FMRadioRequestParent()
+  : mActorDestroyed(false)
+{
+  MOZ_COUNT_CTOR(FMRadioRequestParent);
+}
+
+FMRadioRequestParent::~FMRadioRequestParent()
+{
+  MOZ_COUNT_DTOR(FMRadioRequestParent);
+}
+
+void
+FMRadioRequestParent::ActorDestroy(ActorDestroyReason aWhy)
+{
+  mActorDestroyed = true;
+}
+
+nsresult
+FMRadioRequestParent::Run()
+{
+  MOZ_ASSERT(NS_IsMainThread(), "Wrong thread!");
+
+  if (!mActorDestroyed) {
+    unused << Send__delete__(this, mResponseType);
+  }
+
+  return NS_OK;
+}
+
+END_FMRADIO_NAMESPACE
+

dom/fmradio/ipc/FMRadioRequestParent.h

@@ -0,0 +1,34 @@
+/* -*- Mode: c++; c-basic-offset: 2; indent-tabs-mode: nil; tab-width: 40 -*- */
+/* vim: set ts=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_dom_fmradiorequestparent_h__
+#define mozilla_dom_fmradiorequestparent_h__
+
+#include "FMRadioCommon.h"
+#include "mozilla/dom/PFMRadioRequestParent.h"
+#include "FMRadioService.h"
+
+BEGIN_FMRADIO_NAMESPACE
+
+class FMRadioRequestParent MOZ_FINAL : public PFMRadioRequestParent
+                                     , public ReplyRunnable
+{
+public:
+  FMRadioRequestParent();
+  ~FMRadioRequestParent();
+
+  virtual void ActorDestroy(ActorDestroyReason aWhy) MOZ_OVERRIDE;
+
+  NS_IMETHOD Run();
+
+private:
+  bool mActorDestroyed;
+};
+
+END_FMRADIO_NAMESPACE
+
+#endif // mozilla_dom_fmradiorequestparent_h__
+

dom/fmradio/ipc/Makefile.in

@@ -0,0 +1,20 @@
+# 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/.
+
+DEPTH            = @DEPTH@
+topsrcdir        = @top_srcdir@
+srcdir           = @srcdir@
+VPATH            = @srcdir@
+
+include $(DEPTH)/config/autoconf.mk
+
+LOCAL_INCLUDES += \
+  -I$(topsrcdir)/dom/fmradio \
+  $(NULL)
+
+include $(topsrcdir)/dom/dom-config.mk
+
+include $(topsrcdir)/config/rules.mk
+include $(topsrcdir)/ipc/chromium/chromium-config.mk
+

dom/fmradio/ipc/PFMRadio.ipdl

@@ -0,0 +1,94 @@
+/* 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/. */
+
+include "mozilla/HalTypes.h";
+
+include protocol PContent;
+include protocol PFMRadioRequest;
+
+using mozilla::hal::FMRadioSeekDirection;
+
+namespace mozilla {
+namespace dom {
+
+struct EnableRequestArgs
+{
+  double frequency;
+};
+
+struct DisableRequestArgs
+{
+};
+
+struct SetFrequencyRequestArgs
+{
+  double frequency;
+};
+
+struct SeekRequestArgs
+{
+  FMRadioSeekDirection direction;
+};
+
+struct CancelSeekRequestArgs
+{
+};
+
+union FMRadioRequestArgs
+{
+  EnableRequestArgs;
+  DisableRequestArgs;
+  SetFrequencyRequestArgs;
+  SeekRequestArgs;
+  CancelSeekRequestArgs;
+};
+
+struct StatusInfo
+{
+  bool enabled;
+  double frequency;
+  double upperBound;
+  double lowerBound;
+  double channelWidth;
+};
+
+sync protocol PFMRadio
+{
+  manager PContent;
+  manages PFMRadioRequest;
+
+child:
+  /**
+   * Sent when the frequency is changed.
+   */
+  NotifyFrequencyChanged(double frequency);
+  /**
+   * Sent when the power state of FM radio HW is changed.
+   */
+  NotifyEnabledChanged(bool enabled, double frequency);
+
+  __delete__();
+
+parent:
+  /**
+   * Get the current status infomation of FM radio HW synchronously.
+   * Sent when the singleton object of FMRadioChild is initialized.
+   */
+  sync GetStatusInfo() returns (StatusInfo info);
+
+  /**
+   * Send request to parent process to operate the FM radio HW.
+   *
+   * We don't have separate Enable/SetFrequency/etc. methods instead here,
+   * because we can leverage the IPC messaging mechanism to manage the mapping
+   * of the asynchronous request and the DOMRequest we returned to the caller
+   * on web content, otherwise, we have to do the mapping stuff manually which
+   * is more error prone.
+   */
+  PFMRadioRequest(FMRadioRequestArgs requestType);
+};
+
+} // namespace dom
+} // namespace mozilla
+

dom/fmradio/ipc/PFMRadioRequest.ipdl

@@ -0,0 +1,43 @@
+/* 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/. */
+
+include protocol PFMRadio;
+
+namespace mozilla {
+namespace dom {
+
+struct ErrorResponse
+{
+  nsString error;
+};
+
+struct SuccessResponse
+{
+};
+
+union FMRadioResponseType
+{
+  ErrorResponse;
+  SuccessResponse;
+};
+
+/**
+ * The protocol is used for sending asynchronous operation requests of
+ * FM radio HW from child to parent, and the type of the request is defined in
+ * FMRadioRequestArgs.
+ *
+ * When the request completed, the result, i.e. FMRadioResponseType, will be
+ * sent back to child from parent in the `__delete__` message.
+ */
+async protocol PFMRadioRequest
+{
+  manager PFMRadio;
+
+child:
+  __delete__(FMRadioResponseType response);
+};
+
+} // namespace dom
+} // namespace mozilla
+

dom/fmradio/ipc/moz.build

@@ -0,0 +1,25 @@
+# -*- Mode: python; c-basic-offset: 4; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# 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/.
+
+EXPORTS.mozilla.dom += [
+    'FMRadioChild.h',
+    'FMRadioParent.h',
+    'FMRadioRequestChild.h',
+    'FMRadioRequestParent.h',
+]
+
+CPP_SOURCES += [
+    'FMRadioChild.cpp',
+    'FMRadioParent.cpp',
+    'FMRadioRequestChild.cpp',
+    'FMRadioRequestParent.cpp',
+]
+
+FAIL_ON_WARNINGS = True
+
+LIBXUL_LIBRARY = True
+LIBRARY_NAME   = 'domfmradio_s'
+

dom/ipc/ContentChild.cpp

@@ -98,6 +98,7 @@
 #include "mozilla/dom/mobilemessage/SmsChild.h"
 #include "mozilla/dom/devicestorage/DeviceStorageRequestChild.h"
 #include "mozilla/dom/bluetooth/PBluetoothChild.h"
+#include "mozilla/dom/PFMRadioChild.h"
 #include "mozilla/ipc/InputStreamUtils.h"
 
 #ifdef MOZ_WEBSPEECH
@@ -954,6 +955,30 @@ ContentChild::DeallocPBluetoothChild(PBluetoothChild* aActor)
 #endif
 }
 
+PFMRadioChild*
+ContentChild::AllocPFMRadioChild()
+{
+#ifdef MOZ_B2G_FM
+    NS_RUNTIMEABORT("No one should be allocating PFMRadioChild actors");
+    return nullptr;
+#else
+    NS_RUNTIMEABORT("No support for FMRadio on this platform!");
+    return nullptr;
+#endif
+}
+
+bool
+ContentChild::DeallocPFMRadioChild(PFMRadioChild* aActor)
+{
+#ifdef MOZ_B2G_FM
+    delete aActor;
+    return true;
+#else
+    NS_RUNTIMEABORT("No support for FMRadio on this platform!");
+    return false;
+#endif
+}
+
 PSpeechSynthesisChild*
 ContentChild::AllocPSpeechSynthesisChild()
 {

dom/ipc/ContentChild.h

@@ -158,6 +158,9 @@ public:
     virtual PBluetoothChild* AllocPBluetoothChild();
     virtual bool DeallocPBluetoothChild(PBluetoothChild* aActor);
 
+    virtual PFMRadioChild* AllocPFMRadioChild();
+    virtual bool DeallocPFMRadioChild(PFMRadioChild* aActor);
+
     virtual PSpeechSynthesisChild* AllocPSpeechSynthesisChild();
     virtual bool DeallocPSpeechSynthesisChild(PSpeechSynthesisChild* aActor);
 

dom/ipc/ContentParent.cpp

@@ -32,6 +32,7 @@
 #include "mozilla/dom/power/PowerManagerService.h"
 #include "mozilla/dom/DOMStorageIPC.h"
 #include "mozilla/dom/bluetooth/PBluetoothParent.h"
+#include "mozilla/dom/PFMRadioParent.h"
 #include "mozilla/dom/devicestorage/DeviceStorageRequestParent.h"
 #include "SmsParent.h"
 #include "mozilla/Hal.h"
@@ -125,6 +126,11 @@ using namespace mozilla::system;
 #endif
 
 #include "JavaScriptParent.h"
+
+#ifdef MOZ_B2G_FM
+#include "mozilla/dom/FMRadioParent.h"
+#endif
+
 #include "Crypto.h"
 
 #ifdef MOZ_WEBSPEECH
@@ -2291,6 +2297,32 @@ ContentParent::RecvPBluetoothConstructor(PBluetoothParent* aActor)
 #endif
 }
 
+PFMRadioParent*
+ContentParent::AllocPFMRadioParent()
+{
+#ifdef MOZ_B2G_FM
+    if (!AssertAppProcessPermission(this, "fmradio")) {
+        return nullptr;
+    }
+    return new FMRadioParent();
+#else
+    NS_WARNING("No support for FMRadio on this platform!");
+    return nullptr;
+#endif
+}
+
+bool
+ContentParent::DeallocPFMRadioParent(PFMRadioParent* aActor)
+{
+#ifdef MOZ_B2G_FM
+    delete aActor;
+    return true;
+#else
+    NS_WARNING("No support for FMRadio on this platform!");
+    return false;
+#endif
+}
+
 PSpeechSynthesisParent*
 ContentParent::AllocPSpeechSynthesisParent()
 {

dom/ipc/ContentParent.h

@@ -328,6 +328,9 @@ private:
     virtual bool DeallocPBluetoothParent(PBluetoothParent* aActor);
     virtual bool RecvPBluetoothConstructor(PBluetoothParent* aActor);
 
+    virtual PFMRadioParent* AllocPFMRadioParent();
+    virtual bool DeallocPFMRadioParent(PFMRadioParent* aActor);
+
     virtual PSpeechSynthesisParent* AllocPSpeechSynthesisParent();
     virtual bool DeallocPSpeechSynthesisParent(PSpeechSynthesisParent* aActor);
     virtual bool RecvPSpeechSynthesisConstructor(PSpeechSynthesisParent* aActor);

dom/ipc/Makefile.in

@@ -32,6 +32,7 @@ LOCAL_INCLUDES += \
 	-I$(topsrcdir)/hal/sandbox \
 	-I$(topsrcdir)/dom/mobilemessage/src/ipc \
 	-I$(topsrcdir)/dom/devicestorage \
+	-I$(topsrcdir)/dom/fmradio/ipc \
 	-I$(topsrcdir)/widget/xpwidgets \
 	-I$(topsrcdir)/dom/bluetooth \
 	-I$(topsrcdir)/layout/base \

dom/ipc/PContent.ipdl

@@ -11,6 +11,7 @@ include protocol PCompositor;
 include protocol PCrashReporter;
 include protocol PExternalHelperApp;
 include protocol PDeviceStorageRequest;
+include protocol PFMRadio;
 include protocol PHal;
 include protocol PImageBridge;
 include protocol PIndexedDB;
@@ -126,6 +127,40 @@ union DeviceStorageParams
   DeviceStorageAvailableParams;
 };
 
+struct FMRadioRequestEnableParams
+{
+  double frequency;
+};
+
+struct FMRadioRequestDisableParams
+{
+
+};
+
+struct FMRadioRequestSetFrequencyParams
+{
+  double frequency;
+};
+
+struct FMRadioRequestSeekParams
+{
+  bool upward;
+};
+
+struct FMRadioRequestCancelSeekParams
+{
+
+};
+
+union FMRadioRequestParams
+{
+  FMRadioRequestEnableParams;
+  FMRadioRequestDisableParams;
+  FMRadioRequestSetFrequencyParams;
+  FMRadioRequestSeekParams;
+  FMRadioRequestCancelSeekParams;
+};
+
 union PrefValue {
   nsCString;
   int32_t;
@@ -154,6 +189,7 @@ rpc protocol PContent
     manages PCrashReporter;
     manages PDeviceStorageRequest;
     manages PExternalHelperApp;
+    manages PFMRadio;
     manages PHal;
     manages PIndexedDB;
     manages PMemoryReportRequest;
@@ -319,6 +355,8 @@ parent:
 
     PBluetooth();
 
+    PFMRadio();
+
     // Services remoting
 
     async StartVisitedQuery(URIParams uri);