public static PipeInstance Connect(PipeName pipeName)
{
// parameters validation
if (pipeName == null)
throw new ArgumentNullException("pipeName", "Pipe name must be specified");
while (true)
{
// try to connect to the pipe
IntPtr handle = PipeNative.CreateFile(pipeName.ToString(),
PipeNative.GENERIC_READ | PipeNative.GENERIC_WRITE,
PipeNative.FILE_SHARE_NONE,
null,
PipeNative.OPEN_EXISTING,
PipeNative.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
if (handle == Win32.InvalidHandle)
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode != PipeNative.ERROR_PIPE_BUSY)
{
throw new PipeIOException(errorCode, "Could not open pipe: " + pipeName);
}
if (!PipeNative.WaitNamedPipe(pipeName.ToString(), PipeNative.NMPWAIT_USE_DEFAULT_WAIT))
{
throw new PipeIOException(errorCode, "Specified pipe was over-burdened: " + pipeName);
}
}
else
{
return new PipeInstance(pipeName, handle, true);
}
}
}
public static PipeInstance Create(PipeName pipeName, bool firstInstance, SecurityDescriptor securityDescriptor)
{
// parameters validation
if (pipeName == null)
{
throw new ArgumentNullException("pipeName", "Pipe name must be specified");
}
if (!pipeName.IsLocal)
{
throw new ArgumentException("Could not bind to the remote pipe");
}
PipeNative.SecurityAttributes secAttrs = new PipeNative.SecurityAttributes();
secAttrs.SecurityDescriptor = (securityDescriptor == null ? IntPtr.Zero : securityDescriptor.Handle);
secAttrs.InheritHandle = true;
// try to create pipe
IntPtr handle = PipeNative.CreateNamedPipe(pipeName.ToString(),
PipeNative.PIPE_ACCESS_DUPLEX | PipeNative.FILE_FLAG_OVERLAPPED | (firstInstance ? PipeNative.FILE_FLAG_FIRST_PIPE_INSTANCE : 0),
PipeNative.PIPE_TYPE_BYTE | PipeNative.PIPE_READMODE_BYTE | PipeNative.PIPE_WAIT,
PipeNative.PIPE_UNLIMITED_INSTANCES,
OutBufferSize,
InBufferSize,
PipeNative.NMPWAIT_USE_DEFAULT_WAIT,
secAttrs);
if (handle == Win32.InvalidHandle)
{
throw new PipeIOException(Marshal.GetLastWin32Error(), "Could not create pipe: " + pipeName);
}
else
{
return(new PipeInstance(pipeName, handle, false));
}
}
public static PipeInstance Connect(PipeName pipeName)
{
// parameters validation
if (pipeName == null)
{
throw new ArgumentNullException("pipeName", "Pipe name must be specified");
}
while (true)
{
// try to connect to the pipe
IntPtr handle = PipeNative.CreateFile(pipeName.ToString(),
PipeNative.GENERIC_READ | PipeNative.GENERIC_WRITE,
PipeNative.FILE_SHARE_NONE,
null,
PipeNative.OPEN_EXISTING,
PipeNative.FILE_FLAG_OVERLAPPED,
IntPtr.Zero);
if (handle == Win32.InvalidHandle)
{
int errorCode = Marshal.GetLastWin32Error();
if (errorCode != PipeNative.ERROR_PIPE_BUSY)
{
throw new PipeIOException(errorCode, "Could not open pipe: " + pipeName);
}
if (!PipeNative.WaitNamedPipe(pipeName.ToString(), PipeNative.NMPWAIT_USE_DEFAULT_WAIT))
{
throw new PipeIOException(errorCode, "Specified pipe was over-burdened: " + pipeName);
}
}
else
{
return(new PipeInstance(pipeName, handle, true));
}
}
}
public static PipeInstance Create(PipeName pipeName, bool firstInstance, SecurityDescriptor securityDescriptor)
{
// parameters validation
if (pipeName == null)
throw new ArgumentNullException("pipeName", "Pipe name must be specified");
if (!pipeName.IsLocal)
throw new ArgumentException("Could not bind to the remote pipe");
PipeNative.SecurityAttributes secAttrs = new PipeNative.SecurityAttributes();
secAttrs.SecurityDescriptor = (securityDescriptor == null ? IntPtr.Zero : securityDescriptor.Handle);
secAttrs.InheritHandle = true;
// try to create pipe
IntPtr handle = PipeNative.CreateNamedPipe(pipeName.ToString(),
PipeNative.PIPE_ACCESS_DUPLEX | PipeNative.FILE_FLAG_OVERLAPPED | (firstInstance ? PipeNative.FILE_FLAG_FIRST_PIPE_INSTANCE : 0),
PipeNative.PIPE_TYPE_BYTE | PipeNative.PIPE_READMODE_BYTE | PipeNative.PIPE_WAIT,
PipeNative.PIPE_UNLIMITED_INSTANCES,
OutBufferSize,
InBufferSize,
PipeNative.NMPWAIT_USE_DEFAULT_WAIT,
secAttrs);
if (handle == Win32.InvalidHandle)
{
throw new PipeIOException(Marshal.GetLastWin32Error(), "Could not create pipe: " + pipeName);
}
else
{
return new PipeInstance(pipeName, handle, false);
}
}