/
WaitHandle.cs
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/
WaitHandle.cs
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//
// System.Threading.WaitHandle.cs
//
// Author:
// Dick Porter (dick@ximian.com)
// Gonzalo Paniagua Javier (gonzalo@ximian.com
//
// (C) 2002,2003 Ximian, Inc. (http://www.ximian.com)
// Copyright (C) 2004-2005 Novell, Inc (http://www.novell.com)
//
// Permission is hereby granted, free of charge, to any person obtaining
// a copy of this software and associated documentation files (the
// "Software"), to deal in the Software without restriction, including
// without limitation the rights to use, copy, modify, merge, publish,
// distribute, sublicense, and/or sell copies of the Software, and to
// permit persons to whom the Software is furnished to do so, subject to
// the following conditions:
//
// The above copyright notice and this permission notice shall be
// included in all copies or substantial portions of the Software.
//
// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
// EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
// MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
// NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
// LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
// OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
// WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
//
using System.Runtime.CompilerServices;
using System.Runtime.Remoting.Contexts;
using System.Security.Permissions;
namespace System.Threading
{
public abstract class WaitHandle : MarshalByRefObject, IDisposable
{
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern bool WaitAll_internal(WaitHandle[] handles, int ms, bool exitContext);
static void CheckArray (WaitHandle [] handles)
{
if (handles == null)
throw new ArgumentNullException ("waitHandles");
int length = handles.Length;
if (length > 64)
throw new NotSupportedException ("Too many handles");
foreach (WaitHandle w in handles) {
if (w == null)
throw new ArgumentNullException ("waitHandles", "null handle");
if (w.os_handle == InvalidHandle)
throw new ArgumentException ("null element found", "waitHandle");
}
}
public static bool WaitAll(WaitHandle[] waitHandles)
{
CheckArray (waitHandles);
return(WaitAll_internal(waitHandles, Timeout.Infinite, false));
}
public static bool WaitAll(WaitHandle[] waitHandles, int millisecondsTimeout, bool exitContext)
{
CheckArray (waitHandles);
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return(WaitAll_internal(waitHandles, millisecondsTimeout, false));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
public static bool WaitAll(WaitHandle[] waitHandles,
TimeSpan timeout,
bool exitContext)
{
CheckArray (waitHandles);
long ms = (long) timeout.TotalMilliseconds;
if (ms < -1 || ms > Int32.MaxValue)
throw new ArgumentOutOfRangeException ("timeout");
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return (WaitAll_internal (waitHandles, (int) ms, exitContext));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private static extern int WaitAny_internal(WaitHandle[] handles, int ms, bool exitContext);
// LAMESPEC: Doesn't specify how to signal failures
public static int WaitAny(WaitHandle[] waitHandles)
{
CheckArray (waitHandles);
return(WaitAny_internal(waitHandles, Timeout.Infinite, false));
}
public static int WaitAny(WaitHandle[] waitHandles,
int millisecondsTimeout,
bool exitContext)
{
CheckArray (waitHandles);
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return(WaitAny_internal(waitHandles, millisecondsTimeout, exitContext));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
public static int WaitAny(WaitHandle[] waitHandles,
TimeSpan timeout, bool exitContext)
{
CheckArray (waitHandles);
long ms = (long) timeout.TotalMilliseconds;
if (ms < -1 || ms > Int32.MaxValue)
throw new ArgumentOutOfRangeException ("timeout");
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return (WaitAny_internal(waitHandles, (int) ms, exitContext));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
[MonoTODO]
public WaitHandle() {
// FIXME
}
public const int WaitTimeout = 258;
private IntPtr os_handle = InvalidHandle;
public virtual IntPtr Handle {
get {
return(os_handle);
}
[SecurityPermission (SecurityAction.LinkDemand, UnmanagedCode = true)]
[SecurityPermission (SecurityAction.InheritanceDemand, UnmanagedCode = true)]
set {
os_handle=value;
}
}
public virtual void Close() {
Dispose(true);
GC.SuppressFinalize (this);
}
internal void CheckDisposed ()
{
if (disposed || os_handle == InvalidHandle)
throw new ObjectDisposedException (GetType ().FullName);
}
[MethodImplAttribute(MethodImplOptions.InternalCall)]
private extern bool WaitOne_internal(IntPtr handle, int ms, bool exitContext);
public virtual bool WaitOne()
{
CheckDisposed ();
return(WaitOne_internal(os_handle, Timeout.Infinite, false));
}
public virtual bool WaitOne(int millisecondsTimeout, bool exitContext)
{
CheckDisposed ();
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return(WaitOne_internal(os_handle, millisecondsTimeout, exitContext));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
public virtual bool WaitOne(TimeSpan timeout, bool exitContext)
{
CheckDisposed ();
long ms = (long) timeout.TotalMilliseconds;
if (ms < -1 || ms > Int32.MaxValue)
throw new ArgumentOutOfRangeException ("timeout");
try {
if (exitContext) SynchronizationAttribute.ExitContext ();
return (WaitOne_internal(os_handle, (int) ms, exitContext));
}
finally {
if (exitContext) SynchronizationAttribute.EnterContext ();
}
}
protected static readonly IntPtr InvalidHandle = IntPtr.Zero;
bool disposed = false;
void IDisposable.Dispose() {
Dispose(true);
// Take yourself off the Finalization queue
GC.SuppressFinalize(this);
}
protected virtual void Dispose(bool explicitDisposing) {
// Check to see if Dispose has already been called.
if (!disposed) {
disposed=true;
if (os_handle == InvalidHandle)
return;
lock (this) {
if (os_handle != InvalidHandle) {
NativeEventCalls.CloseEvent_internal (os_handle);
os_handle = InvalidHandle;
}
}
}
}
~WaitHandle() {
Dispose(false);
}
}
}