Winsock Createiocompletionport - Silicon Valley Gazette

Table of Contents

PC running slow?

1. Download ASR Pro from the website

2. Install it on your computer

3. Run the scan to find any malware or virus that might be lurking in your system

Improve the speed of your computer today by downloading this software - it will fix your PC problems.

You may encounter an error message saying that winsock createiocompletionport. It turns out that there are several ways to solve this problem, and this is what we are going to talk about now.

Create an I/O Completion (I/O) Port and thereby map it to the specified file descriptor, or create an I/O Completion Port that is not yet associated with a wake handle, resulting in a timing match.

Associating an open file instance with an I/O completion port allows the best process to be notified of the completion of asynchronous I/O operations that affect that file descriptor.

Syntax

WINAPI CONTROL CreateIoCompletionPort(  _In_ HANDLE FileHandle,  _In_opt_HANDLE ExistingCompletionPort,  _In_ termination key ULONG_PTR,  _In_ DWORD NumberOfConcurrentThreads);

Settings

FileHandle [in]

An open file handle or INVALID_HANDLE_VALUE.

PC running slow?

ASR Pro is the ultimate solution for your PC repair needs! Not only does it swiftly and safely diagnose and repair various Windows issues, but it also increases system performance, optimizes memory, improves security and fine tunes your PC for maximum reliability. So why wait? Get started today!

The handle must refer to an object that overrides I/O.

If handle a accepts this, it must be opened to deal with cascading I/O completion. For example, you must select the FILE_FLAG_OVERLAPPED flag when using this CreateFile function to get a handle.

If INVALID_HANDLE_VALUE is specified, the function withCreates an I/O completion port without mapping it to a file descriptor. In this case, the ExistingCompletionPort parameter must be NULL and the CompletionKey parameter is ignored.

[in,

optional existing termination port]

Using an existing I/O completion plug-in or NULL.

If this parameter specifies the working end of an I/O port, the IT function matches the handle specified by the FileHandle parameter. The function successfully returns a handle bound to an existing I/O completion port; whether or not it creates a new I/O completion port. This

If the parameter is NULL, the entire function creates a new I/O completion interface and, if the FileHandle parameter matches, maps it to the new I/O completion port. Otherwise, there is no file location descriptor. If successful, the function returns a handle to all new completed I/O ports.

CompletionKey [en]

tag

Custom termination key includedon each mount, I/O completion for the specified file descriptor. See the Notes section for more information.

[to]

Number of parallel threads

The maximum number of threads that the operating system can safely allow to process I/O completion packets concurrently for an I/O completion port. This parameter is ignored if the ExistingCompletionPort parameter is not NULL.

If the parameter is zero in this situation, the system allows as many threads to execute simultaneously as there are processor chips in the system.

Return Value

If the functions succeed, the return value is the receiver of the I/O completion port:

If the ExistingCompletionPort was NULL, the return value is effectively a new handle.

If the ExistingCompletionPort parameter was considered a valid I/O port completion handle, all return values are the same handle.

If the FileHandle parameter was a valid handle, idThe actual file descriptor is now associated with the returned I/O completion port.

If the function fails, NULL is returned. To access extended error information, call our GetLastError.

function

The I/O system can be instructed to send I/O completion notification packets to I/O completion ports where they are queued. CreateIoCompletionPort Some functions provide this capability.

An I/O port queue and its handle are associated with the part of the process that created it, and cannot be shared between processes only. However, the same process can be shared by threads within the same process.

Create only an I/O completion port, do not associate it with a file descriptor.

Associate the old I/O completion port with an image handle.

Perform creation and matching in one call.

To create an I/O completion move without allocating it, set the FileHandle parameter to INVALID_HANDLE_VALUE, and the ExistingCompletion parameter toPort is NULL and CompletionKey is null (in this case it is ignored). Typically, the NumberOfConcurrentThreads parameter is set to the desired concurrency value for the new I/O completion port, which defaults to zero (number of processors in the system).

The handle passed in the FileHandle parameter can be any copy that supports overlapped I/O. Most often, this is a handle that opens all CreateFile functions using the FILE_FLAG_OVERLAPPED flag (for cases, files, mailboxes, and channels). Objects generated by other functions, such as Can socket, can also be mapped to an I/O boundary port. For example, if you are using sockets, look for AcceptEx. A handle can be allocated based on a single I/O completion port, and when you complete the allocation, the handle will remain associated with the last I/O completion port that was closed.< /p>

For more information about the theory, usage, and related operations of I/O completion ports, see I/O in the End Ports section.Solutions.

Multiple file handles can be mapped to the same I/O completion port by calling CreateIoCompletionPort multiple times, while the same I/O completion port almost every time returns an ExistingCompletionPort and a directory handle with a different FileHandle setting.

Use the CompletionKey parameter to help your application better keep track of completed I/O operations. This value is not used by CreateIoCompletionPort for functional testing; Instead, during allocation, it is attached to the file handle specified in the FileHandle parameter through the I/O Completion Port. This master completion must be unique for each file you need to care about, and it accompanies the file descriptor directly in the internal completion queuing process. It is also returned in the GetQueuedCompletionStatus function call when a completion packet arrives. The CompletionKey parameter is also used by the PostQueuedCompletionStatus parameter to queue your own custom completion packets.

Because of these ffunctions, since an open handle instance is usually associated with an I/O completion port, they cannot be used in the ReadFileEx function, also called WriteFileEx most of them have their own asynchronous I/O mechanisms.

Instead of sharing the file handle associated with a specific I/O completion port, it’s often better to use handle inheritance or calling the DuplicateHandle function. Operations performed on such similar handles generate completion notifications. A thorough examination is probably recommended.

The I/O completion port handle and each individual file descriptor associated with that particular I/O completion port are called I/O completion port references. A terminating I/O port is freed when there are no other references to it. Therefore, anything behind these handles must be properly closed so that you can release the I/O port termination and associated system resources. Once these conditions are met, closethose I/O port completion monitor by calling

Improve the speed of your computer today by downloading this software - it will fix your PC problems.

Henry Pollard

PC running slow?

Syntax

Settings

PC running slow?

Return Value

Related posts: