Man page - io_prep_pread(3)

Packages contains this manual

Package:  libaio-dev
apt-get install libaio-dev

Manuals in package:
• io(3)
• io_queue_wait(3)
• io_getevents(3)
• io_prep_pread(3)
• io_prep_pwrite(3)
• io_queue_init(3)
• io_queue_release(3)
• io_queue_run(3)
• io_submit(3)
• io_fsync(3)
• io_cancel(3)
• io_prep_fsync(3)
• io_set_callback(3)
Documentations in package:
• libaio-dev

Manual

io_prep_pread

NAME
SYNOPSIS
DESCRIPTION
RETURN VALUES
ERRORS
SEE ALSO

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NAME

io_prep_pread - Set up asynchronous read

SYNOPSIS

#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 (3) 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).

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