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I∕O Completion Port ○꠹ Entries

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I∕O Completion Port ○꠹｜Definition｜1st｜20261013192254-00-⌔

Input/output completion port - Wikipedia

Input/output completion port

Input/output completion port (IOCP) is an API for performing multiple simultaneous asynchronous input/output operations in Windows NT versions 3.5 and later,1 AIX2 and on Solaris 10 and later.3 An input/output completion port object is created and associated with a number of sockets or file handles. When I/O services are requested on the object, completion is indicated by a message queued to the I/O completion port. A process requesting I/O services is not notified of completion of the I/O services, but instead checks the I/O completion port’s message queue to determine the status of its I/O requests. The I/O completion port manages multiple threads and their concurrency.

Printed 2026-10-13.

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Footnotes

  1. Windows I/O Completion Ports ↩

  2. Configuring IOCP on AIX 5 and 6 ↩

  3. “Solaris 10 I/O Completion Ports”. Archived from the original on July 19, 2011. Retrieved 2008-07-20. ↩

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