Poster of Linux kernelThe best gift for a Linux geek
io_prep_pread

io_prep_pread

Section: Linux (3) Updated: 2009-06-10
Local index Up
 

NAME

io_prep_pread - Set up asynchronous read  

SYNOPSYS

#include <errno.h>


#include <libaio.h>
inline void io_prep_pread(struct iocb *iocb, int fd, void *buf, size_t count, long long offset); " struct iocb { void *data; unsigned key; short aio_lio_opcode; short aio_reqprio; int aio_fildes; };
 

DESCRIPTION

io_prep_pread is an inline convenience function designed to facilitate the initialization of the iocb for an asynchronous read operation.

The first iocb->u.c.nbytes = count bytes of the file for which iocb->aio_fildes = fd is a descriptor are written to the buffer starting at iocb->u.c.buf = buf. Reading starts at the absolute position ioc->u.c.offset = offset in the file.

This function returns immediately. To schedule the operation, the function io_submit must be called.

Simultaneous asynchronous operations using the same iocb produce undefined results.  

RETURN VALUES

None.  

ERRORS

None.  

SEE ALSO

io(3), io_cancel(3), io_fsync(3), io_getevents(3), io_prep_fsync(3), io_prep_pwrite(3), io_queue_init(3), io_queue_release(3), io_queue_run(3), io_queue_wait(3), io_set_callback(3), io_submit(3), errno(3).


 

Index

NAME
SYNOPSYS
DESCRIPTION
RETURN VALUES
ERRORS
SEE ALSO

This document was created by man2html, using the manual pages.
Time: 21:48:35 GMT, April 16, 2011