public uint EnQueue(_ThreadPoolWaitCallback tpcallBack)
{
uint tpCount = 0;
bool flag = false;
bool flag2 = false;
RuntimeHelpers.PrepareConstrainedRegions();
try
{
}
finally
{
RuntimeHelpers.PrepareConstrainedRegions();
try
{
Monitor.Enter(this.tpSync);
flag = true;
}
catch (Exception)
{
}
if (flag)
{
if (this.tpCount == 0)
{
flag2 = ThreadPool.SetAppDomainRequestActive();
}
this.tpCount++;
tpCount = this.tpCount;
if (this.tpHead == null)
{
this.tpHead = tpcallBack;
this.tpTail = tpcallBack;
}
else
{
this.tpTail._next = tpcallBack;
this.tpTail = tpcallBack;
}
Monitor.Exit(this.tpSync);
if (flag2)
{
ThreadPool.SetNativeTpEvent();
}
}
}
return(tpCount);
}