/// <summary>
/// Blocks if no release is signaled or removes a release signal. Enter a critical section.
/// In theory, this method is often called P() [Dijkstra, dutch: passeeren]
/// </summary>
/// <remarks>This member is thread-safe.</remarks>
public void Acquire()
{
while (true)
{ //looped 0.5s timeout to make blocked threads abortable.
uint res = NTKernel.WaitForSingleObject(handle, interruptReactionTime);
try { System.Threading.Thread.Sleep(0); }
catch (System.Threading.ThreadInterruptedException e)
{
if (res == 0)
{
int previousCount;
NTKernel.ReleaseSemaphore(handle, 1, out previousCount);
}
throw e;
}
if (res == 0)
{
return;
}
if (res != 258)
{
throw new SemaphoreFailedException();
}
}
}
/// <summary>
/// Signals a release and allows a blocked thread to continue. Leave a critical section.
/// In theory, this method is often called V() [Dijkstra, dutch: vrijgeven]
/// </summary>
/// <remarks>This member is thread-safe.</remarks>
public void Release()
{
int previousCount;
if (!NTKernel.ReleaseSemaphore(handle, 1, out previousCount))
{
throw new SemaphoreFailedException();
}
}