private async Task <IDisposable> WaitAndLockPip()
{
int newValue = Interlocked.Increment(ref _pipLockWaitCount);
await _pipLock.WaitAsync(_pipCancel.Token);
IDisposable result = null;
try {
if (newValue == 1)
{
var evt = UpdateStarted;
if (evt != null)
{
evt(this, EventArgs.Empty);
}
}
result = new CallOnDispose(() => {
try {
if (Interlocked.Decrement(ref _pipLockWaitCount) == 0)
{
var evt = UpdateComplete;
if (evt != null)
{
evt(this, EventArgs.Empty);
}
}
} finally {
_pipLock.Release();
}
});
} finally {
if (result == null)
{
_pipLock.Release();
}
}
return(result);
}
private async Task<IDisposable> WaitAndLockPip() {
int newValue = Interlocked.Increment(ref _pipLockWaitCount);
await _pipLock.WaitAsync(_pipCancel.Token);
IDisposable result = null;
try {
if (newValue == 1) {
var evt = UpdateStarted;
if (evt != null) {
evt(this, EventArgs.Empty);
}
}
result = new CallOnDispose(() => {
try {
if (Interlocked.Decrement(ref _pipLockWaitCount) == 0) {
var evt = UpdateComplete;
if (evt != null) {
evt(this, EventArgs.Empty);
}
}
} finally {
_pipLock.Release();
}
});
} finally {
if (result == null) {
_pipLock.Release();
}
}
return result;
}
