NAME¶
io_queue_init - Initialize asynchronous io state machine
SYNOPSIS¶
#include <errno.h>
#include <libaio.h>
int io_queue_init(int maxevents, io_context_t *ctx);
DESCRIPTION¶
io_queue_init() attempts to create an aio context capable of receiving at
least maxevents events. ctx must point to an aio context that
already exists and must be initialized to 0 before the call. If the
operation is successful, *cxtp is filled with the resulting handle.
RETURN VALUES¶
On success, io_queue_init() returns 0. Otherwise, -error is
return, where error is one of the Exxx values defined in the ERRORS
section.
ERRORS¶
- EFAULT
- iocbs referenced data outside of the program's accessible address
space.
- EINVAL
- maxevents is <= 0 or ctx is an invalid memory
location.
- ENOSYS
- Not implemented.
- EAGAIN
- maxevents > max_aio_reqs where max_aio_reqs is a tunable
value.
SEE ALSO¶
io(3), io_cancel(3), io_fsync(3), io_getevents(3),
io_prep_fsync(3), io_prep_pread(3), io_prep_pwrite(3),
io_queue_release(3), io_queue_run(3), io_queue_wait(3),
io_set_callback(3), io_submit(3), errno(3).
