IOSUBMIT(2) Linux Programmer's Manual IOSUBMIT(2)

NAME
       iosubmit - submit asynchronous I/O blocks for processing

SYNOPSIS
       #include           /* Defines needed types */

       int iosubmit(aiocontextt ctxid, long nr, struct iocb **iocbpp);

       Note: There is no glibc wrapper for this system call; see NOTES.

DESCRIPTION
       The iosubmit() system call queues nr I/O request blocks for processing
       in the AIO context ctxid.  The iocbpp argument should be an  array  of
       nr AIO control blocks, which will be submitted to context ctxid.

RETURN VALUE
       On  success,  iosubmit()  returns the number of iocbs submitted (which
       may be 0 if nr is zero).  For the failure return, see NOTES.

ERRORS
       EAGAIN Insufficient resources are available to queue any iocbs.

       EBADF  The file descriptor specified in the first iocb is invalid.

       EFAULT One of the data structures points to invalid data.

       EINVAL The AIO context specified by ctxid is invalid.  nr is less than
              0.   The  iocb at *iocbpp[0] is not properly initialized, or the
              operation specified is invalid for the file  descriptor  in  the
              iocb.

       ENOSYS iosubmit() is not implemented on this architecture.

VERSIONS
       The asynchronous I/O system calls first appeared in Linux 2.5.

CONFORMING TO
       iosubmit()  is  Linux-specific and should not be used in programs that
       are intended to be portable.

NOTES
       Glibc does not provide a wrapper function for this  system  call.   You
       could  invoke  it  using syscall(2).  But instead, you probably want to
       use the iosubmit() wrapper function provided by libaio.

       Note that the libaio wrapper function uses a  different  type  (iocon‐
       textt)  for  the  ctxid  argument.  Note also that the libaio wrapper
       does not follow the usual C library conventions for indicating  errors:
       on  error it returns a negated error number (the negative of one of the
       values  listed  in  ERRORS).   If  the  system  call  is  invoked   via
       syscall(2),  then  the  return  value follows the usual conventions for
       indicating an error: -1, with errno set  to  a  (positive)  value  that
       indicates the error.

SEE ALSO
       iocancel(2), iodestroy(2), iogetevents(2), iosetup(2), aio(7)

COLOPHON
       This  page  is  part of release 3.53 of the Linux man-pages project.  A
       description of the project, and information about reporting  bugs,  can
       be found at http://www.kernel.org/doc/man-pages/.



Linux                             2012-07-13                      IOSUBMIT(2)