See alsoĬreates a memory-mapped file that has the specified name, capacity, access type, memory allocation options and inheritability. Use this method to create a memory-mapped file that is not persisted (that is, not associated with a file on disk), which you can use to share data between processes. Run Process A first, then B." & vbCrLf & noFile.Message) Using Stream As MemoryMappedViewStream = mmf.CreateViewStream(2, 0)Ĭonsole.WriteLine("Memory-mapped file does not exist. Using (MemoryMappedViewStream stream = mmf.CreateViewStream(2, 0))Ĭonsole.WriteLine("Memory-mapped file does not exist. Run Process A first." & vbCrLf & noFile.Message) Using Stream As MemoryMappedViewStream = mmf.CreateViewStream(1, 0)ĭim writer As BinaryWriter = New BinaryWriter(Stream)Ĭonsole.WriteLine("Memory-mapped file does not exist. Using mmf As MemoryMappedFile = MemoryMappedFile.OpenExisting("testmap")ĭim mTex As Mutex = Mutex.OpenExisting("testmapmutex") Using (MemoryMappedViewStream stream = mmf.CreateViewStream(1, 0))Ĭonsole.WriteLine("Memory-mapped file does not exist. Mutex mutex = Mutex.OpenExisting("testmapmutex") Using (MemoryMappedFile mmf = MemoryMappedFile.OpenExisting("testmap")) Using (MemoryMappedViewStream stream = mmf.CreateViewStream())īinaryWriter writer = new BinaryWriter(stream) Ĭonsole.WriteLine("Start Process B and press ENTER to continue.") Ĭonsole.WriteLine("Start Process C and press ENTER to continue.") īinaryReader reader = new BinaryReader(stream) Ĭonsole.WriteLine("Process A says: ", reader.ReadBoolean()) Mutex mutex = new Mutex(true, "testmapmutex", out mutexCreated) Using (MemoryMappedFile mmf = MemoryMappedFile.CreateNew("testmap", 10000)) Start Process C and press ENTER to continue. The output of Process A is as follows: Start Process B and press ENTER to continue. In the third Command window, run Process C. In the second Command window, run Process B. In the first Command window, run Process A. Process A reads and displays the values from the memory-mapped file.Īfter Process A is finished with the memory-mapped file, the file is immediately reclaimed by garbage collection.Ĭompile the applications and open three Command windows. Process C opens the memory-mapped file and writes a value to it. Process B opens the memory-mapped file and writes a value to it. Process A creates the memory-mapped file and writes a value to it. The following example is composed of three separate processes (console applications) that write Boolean values to a memory-mapped file. NET 5+ only: Calls to the CreateNew method with a named memory mapped file (that is, a non-null mapName) are supported on Windows operating systems only.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |