зеркало из https://github.com/mozilla/pjs.git
126 строки
2.7 KiB
C++
126 строки
2.7 KiB
C++
/* -*- Mode: C++; tab-width: 40; 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/Hal.h"
|
|
#include "mozilla/HalWakeLock.h"
|
|
#include "mozilla/ClearOnShutdown.h"
|
|
#include "nsDataHashtable.h"
|
|
#include "nsHashKeys.h"
|
|
|
|
using namespace mozilla::hal;
|
|
|
|
namespace mozilla {
|
|
namespace hal {
|
|
|
|
WakeLockState
|
|
ComputeWakeLockState(int aNumLocks, int aNumHidden)
|
|
{
|
|
if (aNumLocks == 0) {
|
|
return WAKE_LOCK_STATE_UNLOCKED;
|
|
} else if (aNumLocks == aNumHidden) {
|
|
return WAKE_LOCK_STATE_HIDDEN;
|
|
} else {
|
|
return WAKE_LOCK_STATE_VISIBLE;
|
|
}
|
|
}
|
|
|
|
} // hal
|
|
} // mozilla
|
|
|
|
namespace mozilla {
|
|
namespace hal_impl {
|
|
|
|
namespace {
|
|
struct LockCount {
|
|
PRUint32 numLocks;
|
|
PRUint32 numHidden;
|
|
};
|
|
}
|
|
|
|
static int sActiveChildren = 0;
|
|
static nsAutoPtr<nsDataHashtable<nsStringHashKey, LockCount> > sLockTable;
|
|
static bool sInitialized = false;
|
|
|
|
static void
|
|
Init()
|
|
{
|
|
sLockTable = new nsDataHashtable<nsStringHashKey, LockCount>();
|
|
sLockTable->Init();
|
|
ClearOnShutdown(&sLockTable);
|
|
sInitialized = true;
|
|
}
|
|
|
|
void
|
|
EnableWakeLockNotifications()
|
|
{
|
|
sActiveChildren++;
|
|
}
|
|
|
|
void
|
|
DisableWakeLockNotifications()
|
|
{
|
|
sActiveChildren--;
|
|
}
|
|
|
|
void
|
|
ModifyWakeLock(const nsAString &aTopic,
|
|
hal::WakeLockControl aLockAdjust,
|
|
hal::WakeLockControl aHiddenAdjust)
|
|
{
|
|
if (!sInitialized) {
|
|
Init();
|
|
}
|
|
|
|
LockCount count;
|
|
count.numLocks = 0;
|
|
count.numHidden = 0;
|
|
sLockTable->Get(aTopic, &count);
|
|
MOZ_ASSERT(count.numLocks >= count.numHidden);
|
|
MOZ_ASSERT(aLockAdjust >= 0 || count.numLocks > 0);
|
|
MOZ_ASSERT(aHiddenAdjust >= 0 || count.numHidden > 0);
|
|
|
|
WakeLockState oldState = ComputeWakeLockState(count.numLocks, count.numHidden);
|
|
|
|
count.numLocks += aLockAdjust;
|
|
count.numHidden += aHiddenAdjust;
|
|
MOZ_ASSERT(count.numLocks >= count.numHidden);
|
|
|
|
if (count.numLocks) {
|
|
sLockTable->Put(aTopic, count);
|
|
} else {
|
|
sLockTable->Remove(aTopic);
|
|
}
|
|
|
|
WakeLockState newState = ComputeWakeLockState(count.numLocks, count.numHidden);
|
|
|
|
if (sActiveChildren && oldState != newState) {
|
|
WakeLockInformation info;
|
|
info.numLocks() = count.numLocks;
|
|
info.numHidden() = count.numHidden;
|
|
info.topic() = aTopic;
|
|
NotifyWakeLockChange(info);
|
|
}
|
|
}
|
|
|
|
void
|
|
GetWakeLockInfo(const nsAString &aTopic, WakeLockInformation *aWakeLockInfo)
|
|
{
|
|
if (!sInitialized) {
|
|
Init();
|
|
}
|
|
|
|
LockCount count;
|
|
count.numLocks = 0;
|
|
count.numHidden = 0;
|
|
sLockTable->Get(aTopic, &count);
|
|
|
|
aWakeLockInfo->numLocks() = count.numLocks;
|
|
aWakeLockInfo->numHidden() = count.numHidden;
|
|
aWakeLockInfo->topic() = aTopic;
|
|
}
|
|
|
|
} // hal_impl
|
|
} // mozilla
|