Interlocked.Exchange 메서드

public:
 static float Exchange(float % location1, float value);

public static float Exchange(ref float location1, float value);

static member Exchange : single * single -> single

Public Shared Function Exchange (ByRef location1 As Single, value As Single) As Single

매개 변수

반품

location1원래 값입니다.

예외

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
 static System::Object ^ Exchange(System::Object ^ % location1, System::Object ^ value);

public static object Exchange(ref object location1, object value);

static member Exchange : obj * obj -> obj

Public Shared Function Exchange (ByRef location1 As Object, value As Object) As Object

매개 변수

반품

location1원래 값입니다.

예외

설명

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
 static IntPtr Exchange(IntPtr % location1, IntPtr value);

public static IntPtr Exchange(ref IntPtr location1, IntPtr value);

static member Exchange : nativeint * nativeint -> nativeint

Public Shared Function Exchange (ByRef location1 As IntPtr, value As IntPtr) As IntPtr

매개 변수

반품

location1원래 값입니다.

예외

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
 static double Exchange(double % location1, double value);

public static double Exchange(ref double location1, double value);

static member Exchange : double * double -> double

Public Shared Function Exchange (ByRef location1 As Double, value As Double) As Double

매개 변수

반품

location1원래 값입니다.

예외

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
 static int Exchange(int % location1, int value);

public static int Exchange(ref int location1, int value);

static member Exchange : int * int -> int

Public Shared Function Exchange (ByRef location1 As Integer, value As Integer) As Integer

매개 변수

반품

location1원래 값입니다.

예외

예제

다음 코드 예제에서는 스레드로부터 안전한 리소스 잠금 메커니즘을 보여줍니다.

using System;
using System.Threading;

namespace InterlockedExchange_Example
{
    class MyInterlockedExchangeExampleClass
    {
        //0 for false, 1 for true.
        private static int usingResource = 0;

        private const int numThreadIterations = 5;
        private const int numThreads = 10;

        static void Main()
        {
            Thread myThread;
            Random rnd = new Random();

            for(int i = 0; i < numThreads; i++)
            {
                myThread = new Thread(new ThreadStart(MyThreadProc));
                myThread.Name = String.Format("Thread{0}", i + 1);
            
                //Wait a random amount of time before starting next thread.
                Thread.Sleep(rnd.Next(0, 1000));
                myThread.Start();
            }
        }

        private static void MyThreadProc()
        {
            for(int i = 0; i < numThreadIterations; i++)
            {
                UseResource();
            
                //Wait 1 second before next attempt.
                Thread.Sleep(1000);
            }
        }

        //A simple method that denies reentrancy.
        static bool UseResource()
        {
            //0 indicates that the method is not in use.
            if(0 == Interlocked.Exchange(ref usingResource, 1))
            {
                Console.WriteLine("{0} acquired the lock", Thread.CurrentThread.Name);
            
                //Code to access a resource that is not thread safe would go here.
            
                //Simulate some work
                Thread.Sleep(500);

                Console.WriteLine("{0} exiting lock", Thread.CurrentThread.Name);
            
                //Release the lock
                Interlocked.Exchange(ref usingResource, 0);
                return true;
            }
            else
            {
                Console.WriteLine("   {0} was denied the lock", Thread.CurrentThread.Name);
                return false;
            }
        }
    }
}

Imports System.Threading

Namespace InterlockedExchange_Example
    Class MyInterlockedExchangeExampleClass
        '0 for false, 1 for true.
        Private Shared usingResource As Integer = 0

        Private Const numThreadIterations As Integer = 5
        Private Const numThreads As Integer = 10

        <MTAThread> _
        Shared Sub Main()
            Dim myThread As Thread
            Dim rnd As New Random()

            Dim i As Integer
            For i = 0 To numThreads - 1
                myThread = New Thread(AddressOf MyThreadProc)
                myThread.Name = String.Format("Thread{0}", i + 1)

                'Wait a random amount of time before starting next thread.
                Thread.Sleep(rnd.Next(0, 1000))
                myThread.Start()
            Next i
        End Sub

        Private Shared Sub MyThreadProc()
            Dim i As Integer
            For i = 0 To numThreadIterations - 1
                UseResource()

                'Wait 1 second before next attempt.
                Thread.Sleep(1000)
            Next i
        End Sub 

        'A simple method that denies reentrancy.
        Shared Function UseResource() As Boolean
            '0 indicates that the method is not in use.
            If 0 = Interlocked.Exchange(usingResource, 1) Then
                Console.WriteLine("{0} acquired the lock", Thread.CurrentThread.Name)

                'Code to access a resource that is not thread safe would go here.
                'Simulate some work
                Thread.Sleep(500)

                Console.WriteLine("{0} exiting lock", Thread.CurrentThread.Name)

                'Release the lock
                Interlocked.Exchange(usingResource, 0)
                Return True
            Else
                Console.WriteLine("   {0} was denied the lock", Thread.CurrentThread.Name)
                Return False
            End If
        End Function 
    End Class 
End Namespace

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
 static long Exchange(long % location1, long value);

public static long Exchange(ref long location1, long value);

static member Exchange : int64 * int64 -> int64

Public Shared Function Exchange (ByRef location1 As Long, value As Long) As Long

매개 변수

반품

location1원래 값입니다.

예외

추가 정보

• 관리되는 스레딩
• 동기화 기본 형식 개요

public:
generic <typename T>
 where T : class static T Exchange(T % location1, T value);

public static T Exchange<T>(ref T location1, T value) where T : class;

[System.Runtime.InteropServices.ComVisible(false)]
public static T Exchange<T>(ref T location1, T value) where T : class;

static member Exchange : 'T * 'T -> 'T (requires 'T : null)

[<System.Runtime.InteropServices.ComVisible(false)>]
static member Exchange : 'T * 'T -> 'T (requires 'T : null)

Public Shared Function Exchange(Of T As Class) (ByRef location1 As T, value As T) As T

형식 매개 변수

매개 변수

반품

location1원래 값입니다.

특성

ComVisibleAttribute

예외