C#操作非持久化内存映射文件详解

using System.IO.MemoryMappedFiles;
 
Console.WriteLine("我是独立进程A");
 
using MemoryMappedFile mmf = MemoryMappedFile.CreateNew("test_mem_map_file", 10000);
 
bool mutexCreated;
Mutex mutex = new Mutex(true, "testmapmutex", out mutexCreated);
using (MemoryMappedViewStream stream = mmf.CreateViewStream())
{
    BinaryWriter writer = new BinaryWriter(stream);
    writer.Write(1);
}
mutex.ReleaseMutex();
 
Console.WriteLine("请启动进程 B 并按下确认键以继续运行.");
Console.ReadLine();
 
Console.WriteLine("请启动进程 C 并按下确认键以继续运行.");
Console.ReadLine();
 
mutex.WaitOne();
using (MemoryMappedViewStream stream = mmf.CreateViewStream())
{
    BinaryReader reader = new BinaryReader(stream);
    Console.WriteLine("进程 A 写入的内容: {0}", reader.ReadBoolean());
    Console.WriteLine("进程 B 写入的内容: {0}", reader.ReadBoolean());
    Console.WriteLine("进程 C 写入的内容: {0}", reader.ReadBoolean());
}
mutex.ReleaseMutex();
 
 
Console.ReadLine();

using System.IO.MemoryMappedFiles;
 
Console.WriteLine("我是独立进程B");
 
try
{
    using MemoryMappedFile mmf = MemoryMappedFile.OpenExisting("test_mem_map_file");
    Mutex mutex = Mutex.OpenExisting("testmapmutex");
    mutex.WaitOne();
 
    using (MemoryMappedViewStream stream = mmf.CreateViewStream(1, 0))
    {
        BinaryWriter writer = new BinaryWriter(stream);
        writer.Write(0);
    }
    mutex.ReleaseMutex();
}
catch (FileNotFoundException)
{
    Console.WriteLine("内存映射文件不存在. 请先运行进程A.");
}

using System.IO.MemoryMappedFiles;
 
Console.WriteLine("我是独立进程C");
 
try
{
    using MemoryMappedFile mmf = MemoryMappedFile.OpenExisting("test_mem_map_file");
    Mutex mutex = Mutex.OpenExisting("testmapmutex");
    mutex.WaitOne();
 
    using (MemoryMappedViewStream stream = mmf.CreateViewStream(2, 0))
    {
        BinaryWriter writer = new BinaryWriter(stream);
        writer.Write(0);
    }
    mutex.ReleaseMutex();
}
catch (FileNotFoundException)
{
    Console.WriteLine("内存映射文件不存在. 请先运行进程A,再运行进程B.");
}