public TracedLock(TraceableLock traceableLock, TimeSpan?timeout)
{
if (timeout == null)
{
timeout = TimeSpan.FromSeconds(30);
}
_status = TracedLockStatus.Acquiring; //useful for detecting dead-lock
_traceableLock = traceableLock;
LockAnalyzer.Lock(traceableLock);
//collect useful information about the context such
//as stacktrace, time to acquire the lock(T1)
if (Monitor.TryEnter(_traceableLock, timeout.Value))
{
_status = TracedLockStatus.Acquired;
}
else
{
_status = TracedLockStatus.Timedout;
}
//lock is acuired, so collect acquired-time(T2)
//[T2-T1 = time taken to acquire lock]
}
public static void Release(TraceableLock traceableLock)
{
lock (Sync)
{
var threadId = Thread.CurrentThread.ManagedThreadId;
if (ActiveLockChains[threadId].Count > 0 && ActiveLockChains[threadId].Last() == traceableLock)
ActiveLockChains[threadId].Remove(traceableLock);
}
}
static IEnumerable<TraceableLock> RequiredLocks(TraceableLock traceableLock)
{
if (Requires.ContainsKey(traceableLock))
foreach (var tl in Requires[traceableLock])
{
yield return tl;
foreach (TraceableLock tl2 in RequiredLocks(tl))
{
yield return tl2;
}
}
}
public static void Release(TraceableLock traceableLock)
{
lock (Sync)
{
var threadId = Thread.CurrentThread.ManagedThreadId;
if (ActiveLockChains[threadId].Count > 0 && ActiveLockChains[threadId].Last() == traceableLock)
{
ActiveLockChains[threadId].Remove(traceableLock);
}
}
}
static IEnumerable <TraceableLock> RequiredLocks(TraceableLock traceableLock)
{
if (Requires.ContainsKey(traceableLock))
{
foreach (var tl in Requires[traceableLock])
{
yield return(tl);
foreach (TraceableLock tl2 in RequiredLocks(tl))
{
yield return(tl2);
}
}
}
}
public static void Lock(TraceableLock traceableLock)
{
lock (Sync)
{
var threadId = Thread.CurrentThread.ManagedThreadId;
if (!ActiveLockChains.ContainsKey(threadId))
ActiveLockChains[threadId] = new List<TraceableLock>();
if (ActiveLockChains[threadId].Contains(traceableLock))
return; // Same thread using the same lock
ActiveLockChains[threadId].Add(traceableLock);
if (!VerifyLockChain(ActiveLockChains[threadId]))
{
var copy = ActiveLockChains[threadId].ToList();
ActiveLockChains[threadId].Remove(ActiveLockChains[threadId].Last());
PossibleDeadlock(copy);
}
}
}
private static bool VerifyLockChain(IEnumerable <TraceableLock> thisLockChain)
{
var chainRequredLocks = new List <TraceableLock>();
TraceableLock prevLock = null;
foreach (TraceableLock traceableLock in thisLockChain)
{
if (chainRequredLocks.Contains(traceableLock))
{
return(false);
}
if (Requires.ContainsKey(traceableLock))
{
chainRequredLocks.AddRange(RequiredLocks(traceableLock));
}
if (prevLock != null)
{
if (Requires.ContainsKey(traceableLock))
{
if (!Requires[traceableLock].Contains(prevLock))
{
Requires[traceableLock].Add(prevLock);
}
}
else
{
Requires[traceableLock] = new List <TraceableLock> {
prevLock
};
}
}
prevLock = traceableLock;
}
return(true);
}
public static void Lock(TraceableLock traceableLock)
{
lock (Sync)
{
var threadId = Thread.CurrentThread.ManagedThreadId;
if (!ActiveLockChains.ContainsKey(threadId))
{
ActiveLockChains[threadId] = new List <TraceableLock>();
}
if (ActiveLockChains[threadId].Contains(traceableLock))
{
return; // Same thread using the same lock
}
ActiveLockChains[threadId].Add(traceableLock);
if (!VerifyLockChain(ActiveLockChains[threadId]))
{
var copy = ActiveLockChains[threadId].ToList();
ActiveLockChains[threadId].Remove(ActiveLockChains[threadId].Last());
PossibleDeadlock(copy);
}
}
}
public TracedLock(TraceableLock traceableLock, TimeSpan? timeout)
{
if (timeout == null)
timeout = TimeSpan.FromSeconds(30);
_status = TracedLockStatus.Acquiring; //useful for detecting dead-lock
_traceableLock = traceableLock;
LockAnalyzer.Lock(traceableLock);
//collect useful information about the context such
//as stacktrace, time to acquire the lock(T1)
if (Monitor.TryEnter(_traceableLock, timeout.Value))
{
_status = TracedLockStatus.Acquired;
}
else
{
_status = TracedLockStatus.Timedout;
}
//lock is acuired, so collect acquired-time(T2)
//[T2-T1 = time taken to acquire lock]
}
public static TracedLock Lock(TraceableLock traceableLock, TimeSpan?maxWaitTime = null)
{
return(new TracedLock(traceableLock, maxWaitTime));
}
public static TracedLock Lock(TraceableLock traceableLock, TimeSpan? maxWaitTime = null)
{
return new TracedLock(traceableLock, maxWaitTime);
}
