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AIO_RETURN(2) BSD System Calls Manual AIO_RETURN(2) NAME aio_return -- retrieve return status of asynchronous I/O operation (REALTIME) LIBRARY Standard C Library (libc, -lc) SYNOPSIS #include <aio.h> ssize_t aio_return(struct aiocb *aiocbp); DESCRIPTION The aio_return() system call returns the final status of the asynchronous I/O request associated with the structure pointed to by aiocbp. The aio_return() system call should only be called once, to obtain the final status of an asynchronous I/O operation (once aio_error(2) returns something other than EINPROGRESS) and to clean up system resources. However, if aio_return() is not called at all, aio(4) will leak resources. RETURN VALUES If the asynchronous I/O request has completed, the status is returned as described in read(2), write(2), or fsync(2). On failure, aio_return() returns -1 and sets errno to indicate the error condi-tion. condition. tion. ERRORS The aio_return() system call will fail if: [EINVAL] The aiocbp argument does not reference an outstanding asynchronous I/O request. [EINPROGRESS] The asynchronous I/O request is still in progress. LEGACY SYNOPSIS #include <aio.h> int aio_return(struct aiocb *aiocbp); The type of the return value has changed. SEE ALSO aio_cancel(2), aio_error(2), aio_suspend(2), aio_write(2), fsync(2), read(2), write(2), aio(4), compat(5) STANDARDS The aio_return() system call is expected to conform to the IEEE Std 1003.1 (``POSIX.1'') standard. HISTORY The aio_return() system call first appeared in FreeBSD 3.0. AUTHORS This manual page was written by Wes Peters <wes@softweyr.com>. BSD September 26, 2008 BSD |
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