public static extern SafeWaitHandle CreateWaitableTimer(
SECURITY_ATTRIBUTES timerAttributes,
bool manualReset,
string timerName);
public static extern SafeWaitHandle CreateWaitableTimerEx(
SECURITY_ATTRIBUTES timerAttributes,
string timerName,
Int32 flags,
UInt32 desiredAccess);
private unsafe SafeWaitHandle CreateTimerHandle(bool manualReset,
string name,
out bool createdNew,
WaitableTimerSecurity timerSecurity)
{
if (name != null && name.Length > 260)
{
throw new ArgumentException("name is too long.");
}
SECURITY_ATTRIBUTES secattr = null;
if (timerSecurity != null)
{
// Create a SECURITY_ATTRIBUTES class and populate it
// from the information stored in timerSecurity
secattr = new SECURITY_ATTRIBUTES();
secattr.nLength = Marshal.SizeOf(secattr);
byte[] binaryForm = timerSecurity.GetSecurityDescriptorBinaryForm();
byte* pbin = stackalloc byte[binaryForm.Length];
fixed (byte* psrc = binaryForm)
{
for (int i = 0; i < binaryForm.Length; ++i)
{
*(pbin + i) = *(psrc + i);
}
}
secattr.lpSecurityDescriptor = (IntPtr)pbin;
}
SafeWaitHandle handle = Win32WaitableTimer.CreateWaitableTimer(secattr, manualReset, name);
int lastError = Marshal.GetLastWin32Error();
if (handle.IsInvalid)
{
if (name == null)
{
throw GetWin32Exception();
}
if (lastError == Win32WaitableTimer.ERROR_INVALID_HANDLE)
{
throw new WaitHandleCannotBeOpenedException("Invalid handle");
}
throw new WaitHandleCannotBeOpenedException();
}
createdNew = (Marshal.GetLastWin32Error() == Win32WaitableTimer.ERROR_ALREADY_EXISTS);
return handle;
}