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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 */
#ifndef mozilla_ipc_IdleSchedulerChild_h__
#define mozilla_ipc_IdleSchedulerChild_h__
#include "mozilla/Assertions.h"
#include "mozilla/Attributes.h"
#include "mozilla/ipc/PIdleSchedulerChild.h"
class nsIIdlePeriod;
namespace mozilla {
class IdlePeriodState;
namespace ipc {
class BackgroundChildImpl;
class IdleSchedulerChild final : public PIdleSchedulerChild {
IdleSchedulerChild() = default;
IPCResult RecvIdleTime(uint64_t aId, TimeDuration aBudget);
void Init(IdlePeriodState* aIdlePeriodState);
void Disconnect() { mIdlePeriodState = nullptr; }
// See similar methods on PrioritizedEventQueue.
void SetActive();
// Returns true if activity state dropped below cpu count.
bool SetPaused();
typedef MozPromise<bool, ResponseRejectReason, true> MayGCPromise;
// Returns null if a GC or GC request is already in progress.
RefPtr<MayGCPromise> MayGCNow();
// Regardless of how a GC is started we get informed via these.
void StartedGC();
void DoneGC();
// Returns nullptr if this is the parent process or the IdleSchedulerChild has
// already been destroyed, eg if IPC is shutting down.
static IdleSchedulerChild* GetMainThreadIdleScheduler();
friend class BackgroundChildImpl;
// See IdleScheduleParent::sActiveChildCounter
base::SharedMemory mActiveCounter;
IdlePeriodState* mIdlePeriodState = nullptr;
uint32_t mChildId = 0;
// These fields replicate those in IdleSchedulerParent. Tracking them here
// ensures we don't send confusing information to the parent, while
// nsJSEnvironment is free to tell us about any GCs.
bool mIsRequestingGC = false;
bool mIsDoingGC = false;
} // namespace ipc
} // namespace mozilla
#endif // mozilla_ipc_IdleSchedulerChild_h__