SignalAndWait Method (Int32)

Barrier.SignalAndWait Method (Int32)

.NET Framework (current version)

Signals that a participant has reached the barrier and waits for all other participants to reach the barrier as well, using a 32-bit signed integer to measure the timeout.

Namespace:   System.Threading
Assembly:  System (in System.dll)

public bool SignalAndWait(
	int millisecondsTimeout


Type: System.Int32

The number of milliseconds to wait, or Infinite(-1) to wait indefinitely.

Return Value

Type: System.Boolean

if all participants reached the barrier within the specified time; otherwise false.

Exception Condition

The current instance has already been disposed.


millisecondsTimeout is a negative number other than -1, which represents an infinite time-out.


The method was invoked from within a post-phase action, the barrier currently has 0 participants, or the barrier is signaled by more threads than are registered as participants.


If an exception is thrown from the post phase action of a Barrier after all participating threads have called SignalAndWait, the exception will be wrapped in a BarrierPostPhaseException and be thrown on all participating threads.

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 4.0
Portable Class Library
Supported in: portable .NET platforms
Windows Phone Silverlight
Available since 8.0
Windows Phone
Available since 8.1
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