/**/
private static readonly ConditionalWeakTable <SemaphoreSlim, SemaphoreSlimCalledWrapper>
CalledWrappers = new ConditionalWeakTable <SemaphoreSlim, SemaphoreSlimCalledWrapper>();
public static SemaphoreSlimCalledWrapper GetCalledWrapper(
this SemaphoreSlim lockSem
)
{
Assert.NotNull(lockSem);
return(CalledWrappers.GetValue(
lockSem,
_ => new SemaphoreSlimCalledWrapper(lockSem)
));
}
/**/
public static async Task <IDisposable> GetDisposable(
this SemaphoreSlim lockSemaphoreSlim,
bool throwCancelledIfSemLocked = false,
CancellationToken token = default(CancellationToken),
[CallerMemberName] string mthdName = "",
[CallerLineNumber] int lineNum = 0,
#if DEBUG
[CallerFilePath]
#endif
string fp = ""
)
{
int fc = MiscFuncs.CheckStackFrameCount();
if (
throwCancelledIfSemLocked &&
lockSemaphoreSlim.CurrentCount == 0
)
{
throw new OperationCanceledException();
}
return(await SemaphoreSlimDisposableWrapper
.CreateInstance(
lockSemaphoreSlim,
$"{fc} {mthdName} line {lineNum} file {fp}",
token
).ConfigureAwait(false));
}
public static async Task <SemaphoreSlimDisposableWrapper> CreateInstance(
SemaphoreSlim lockSem,
string mthdName,
CancellationToken token
)
{
if (lockSem == null)
{
throw new ArgumentNullException(
MyNameof.GetLocalVarName(() => lockSem)
);
}
var wrapperNum = Interlocked.Increment(ref _nextDbNum);
var result = new SemaphoreSlimDisposableWrapper(lockSem);
result._wrapperNum = wrapperNum;
result.MthdName = mthdName;
result.TryEnterTime = DateTime.UtcNow;
SemWrappersDb.TryAdd(wrapperNum, result);
await result._lockSem.WaitAsync(token).ConfigureAwait(false);
result.EnterTime = DateTime.UtcNow;
return(result);
}
