Interlocked.Exchange Метод

public:
 static System::UInt16 Exchange(System::UInt16 % location1, System::UInt16 value);

[System.CLSCompliant(false)]
public static ushort Exchange (ref ushort location1, ushort value);

[<System.CLSCompliant(false)>]
static member Exchange : uint16 * uint16 -> uint16

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

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

CLSCompliantAttribute

Исключения

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

public:
 static System::UInt32 Exchange(System::UInt32 % location1, System::UInt32 value);

[System.CLSCompliant(false)]
public static uint Exchange (ref uint location1, uint value);

[<System.CLSCompliant(false)>]
static member Exchange : uint32 * uint32 -> uint32

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

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

CLSCompliantAttribute

Исключения

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

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

[System.CLSCompliant(false)]
public static UIntPtr Exchange (ref UIntPtr location1, UIntPtr value);

[<System.CLSCompliant(false)>]
static member Exchange : unativeint * unativeint -> unativeint

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

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

CLSCompliantAttribute

Исключения

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

public:
 static System::UInt64 Exchange(System::UInt64 % location1, System::UInt64 value);

[System.CLSCompliant(false)]
public static ulong Exchange (ref ulong location1, ulong value);

[<System.CLSCompliant(false)>]
static member Exchange : uint64 * uint64 -> uint64

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

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

CLSCompliantAttribute

Исключения

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

[System.CLSCompliant(false)]
public static sbyte Exchange (ref sbyte location1, sbyte value);

[<System.CLSCompliant(false)>]
static member Exchange : sbyte * sbyte -> sbyte

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

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

CLSCompliantAttribute

Исключения

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

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

static member Exchange : byte * byte -> byte

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.CoreCLR.cs

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.CoreCLR.cs

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

Примеры

В следующем примере кода показан механизм блокировки ресурсов, безопасный для потоков.

using namespace System;
using namespace System::Threading;

const int numThreads = 10;
const int numThreadIterations = 5;
ref class MyInterlockedExchangeExampleClass
{
public:
   static void MyThreadProc()
   {
      for ( int i = 0; i < numThreadIterations; i++ )
      {
         UseResource();
         
         //Wait 1 second before next attempt.
         Thread::Sleep( 1000 );

      }
   }


private:
   //A simple method that denies reentrancy.
   static bool UseResource()
   {
      
      //0 indicates that the method is not in use.
      if ( 0 == Interlocked::Exchange( 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( usingResource, 0 );
         return true;
      }
      else
      {
         Console::WriteLine( " {0} was denied the lock", Thread::CurrentThread->Name );
         return false;
      }
   }


   //0 for false, 1 for true.
   static int usingResource;
};

int main()
{
   Thread^ myThread;
   Random^ rnd = gcnew Random;
   for ( int i = 0; i < numThreads; i++ )
   {
      myThread = gcnew Thread( gcnew ThreadStart( MyInterlockedExchangeExampleClass::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();

   }
}

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

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

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

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

static member Exchange : int16 * int16 -> int16

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.cs

Исходный код:

Interlocked.CoreCLR.cs

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

public static object Exchange (ref object location1, 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

Параметры

Возвращаемое значение

Исходное значение location1.

Исключения

Комментарии

См. также раздел

• управляемых потоков
• Обзор примитивов синхронизации

Исходный код:

Interlocked.CoreCLR.cs

Исходный код:

Interlocked.CoreCLR.cs

Исходный код:

Interlocked.CoreCLR.cs

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

Параметры типа

Параметры

Возвращаемое значение

Исходное значение location1.

Атрибуты

ComVisibleAttribute

Исключения

Комментарии

Этот метод поддерживает только ссылочные типы. Существуют перегрузки метода Exchange для Int32, Int64, IntPtr, Singleи Double типов значений, но нет поддержки других типов значений.