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aio_waitcomplete (2)
  • >> aio_waitcomplete (2) ( FreeBSD man: Системные вызовы )

  • BSD mandoc
     

    NAME

    
    
    aio_waitcomplete
    
     - wait for the next completion of an aio request
    
     
    

    LIBRARY

    Lb libc
    
     
    

    SYNOPSIS

       #include <aio.h>
    int aio_waitcomplete (struct aiocb **iocbp struct timespec *timeout);
     

    DESCRIPTION

    The aio_waitcomplete ();
    system call waits for completion of an asynchronous I/O request. Upon completion, aio_waitcomplete ();
    returns the result of the function and sets Fa iocbp to point to the structure associated with the original request. If an asynchronous I/O request is completed before aio_waitcomplete ();
    is called, it returns immediately with the completed request.

    If Fa timeout is a non-NULL pointer, it specifies a maximum interval to wait for a asynchronous I/O request to complete. If Fa timeout is a NULL pointer, aio_waitcomplete ();
    waits indefinitely. To effect a poll, the Fa timeout argument should be non-NULL, pointing to a zero-valued timeval structure.

    The aio_waitcomplete ();
    system call also serves the function of aio_return (,);
    thus aio_return ();
    should not be called for the control block returned in Fa iocbp .  

    RETURN VALUES

    If an asynchronous I/O request has completed, Fa iocbp is set to point to the control block passed with the original request, and the status is returned as described in read(2), write(2), or fsync(2). On failure, aio_waitcomplete ();
    returns -1 sets iocbp to NULL and sets errno to indicate the error condition.  

    ERRORS

    The aio_waitcomplete ();
    system call fails if:

    Bq Er EINVAL
    The specified time limit is invalid.
    Bq Er EAGAIN
    The process has not yet called aio_read ();
    or aio_write (.);
    Bq Er EINTR
    A signal was delivered before the timeout expired and before any asynchronous I/O requests completed.
    Bq Er EWOULDBLOCK
    Bq Er EINPROGRESS
    The specified time limit expired before any asynchronous I/O requests completed.

     

    SEE ALSO

    aio_cancel2, aio_error2, aio_read2, aio_return2, aio_suspend2, aio_write2, fsync(2), read(2), write(2), aio(4)  

    STANDARDS

    The aio_waitcomplete ();
    system call is a Fx Ns -specific extension.  

    HISTORY

    The aio_waitcomplete ();
    system call first appeared in Fx 4.0 .  

    AUTHORS

    The aio_waitcomplete ();
    system call and this manual page were written by An Christopher M Sedore Aq [email protected] .


     

    Index

    NAME
    LIBRARY
    SYNOPSIS
    DESCRIPTION
    RETURN VALUES
    ERRORS
    SEE ALSO
    STANDARDS
    HISTORY
    AUTHORS


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