Intel® oneAPI DPC++/C++ Compiler Developer Guide and Reference

ID 767253
Date 9/08/2022
Public

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<span class='option'>aio_return</span>

Returns the final return status for the asynchronous I/O request.

Syntax

ssize_t aio_return(struct aiocb *aiocbp);

Arguments

*aiocbp

Pointer to control block from where asynchronous I/O request is generated

Description

The aio_return function returns the final return status for the asynchronous I/O request with control block pointed to by aiocbp.

Call this function only once for any given request, after aio_error() returns a value other than EINPROGRESS.

Returns

Return value for synchronous ReadFile()/WriteFile()/FlushFileBuffer() requests: When asynchronous I/O operation is completed

Undefined return value: When asynchronous I/O operation is not completed

Error value: When an error occurs

To get the correct error code/value, use errno.