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Imported Upstream version 4.8.0.309

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Former-commit-id: 5f9c6ae75f295e057a7d2971f3a6df4656fa8850
This commit is contained in:
Xamarin Public Jenkins (auto-signing)
2016-11-10 13:04:39 +00:00
parent ee1447783b
commit 94b2861243
4912 changed files with 390737 additions and 49310 deletions
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21
mcs/class/referencesource/System.Runtime.Caching/System/Caching/MemoryCacheStatistics.cs
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@ -27,7 +27,7 @@ namespace System.Runtime.Caching {
private int _lastTrimPercent;
private DateTime _lastTrimTime;
private int _pollingInterval;
private Timer _timer;
private GCHandleRef<Timer> _timerHandleRef;
private Object _timerLock;
private long _totalCountBeforeTrim;
@ -44,16 +44,18 @@ namespace System.Runtime.Caching {
private void AdjustTimer() {
lock (_timerLock) {
if (_timer == null)
if (_timerHandleRef == null)
return;
Timer timer = _timerHandleRef.Target;
// the order of these if statements is important
// When above the high pressure mark, interval should be 5 seconds or less
if (_physicalMemoryMonitor.IsAboveHighPressure() || _cacheMemoryMonitor.IsAboveHighPressure()) {
if (_pollingInterval > MEMORYSTATUS_INTERVAL_5_SECONDS) {
_pollingInterval = MEMORYSTATUS_INTERVAL_5_SECONDS;
_timer.Change(_pollingInterval, _pollingInterval);
timer.Change(_pollingInterval, _pollingInterval);
}
return;
}
@ -65,7 +67,7 @@ namespace System.Runtime.Caching {
int newPollingInterval = Math.Min(_configPollingInterval, MEMORYSTATUS_INTERVAL_30_SECONDS);
if (_pollingInterval != newPollingInterval) {
_pollingInterval = newPollingInterval;
_timer.Change(_pollingInterval, _pollingInterval);
timer.Change(_pollingInterval, _pollingInterval);
}
return;
}
@ -73,7 +75,7 @@ namespace System.Runtime.Caching {
// there is no pressure, interval should be the value from config
if (_pollingInterval != _configPollingInterval) {
_pollingInterval = _configPollingInterval;
_timer.Change(_pollingInterval, _pollingInterval);
timer.Change(_pollingInterval, _pollingInterval);
}
}
}
@ -126,7 +128,8 @@ namespace System.Runtime.Caching {
bool dispose = true;
try {
_cacheMemoryMonitor = new CacheMemoryMonitor(_memoryCache, _configCacheMemoryLimitMegabytes);
_timer = new Timer(new TimerCallback(CacheManagerTimerCallback), null, _configPollingInterval, _configPollingInterval);
Timer timer = new Timer(new TimerCallback(CacheManagerTimerCallback), null, _configPollingInterval, _configPollingInterval);
_timerHandleRef = new GCHandleRef<Timer>(timer);
dispose = false;
}
finally {
@ -246,9 +249,9 @@ namespace System.Runtime.Caching {
public void Dispose() {
if (Interlocked.Exchange(ref _disposed, 1) == 0) {
lock (_timerLock) {
Timer timer = _timer;
if (timer != null && Interlocked.CompareExchange(ref _timer, null, timer) == timer) {
timer.Dispose();
GCHandleRef<Timer> timerHandleRef = _timerHandleRef;
if (timerHandleRef != null && Interlocked.CompareExchange(ref _timerHandleRef, null, timerHandleRef) == timerHandleRef) {
timerHandleRef.Dispose();
Dbg.Trace("MemoryCacheStats", "Stopped CacheMemoryTimers");
}
}