io_queue_init - Online Linux Manual PageSection : 3
Updated : 2019-07-23
Source : Linux
Note : Linux AIO

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NAMEio_queue_init − Initialize asynchronous io state machine

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SYNOPSIS#include <errno.h>
#include <libaio.h>
int io_queue_init(int maxevents, io_context_t *ctx);

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DESCRIPTIONio_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.

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RETURN VALUESOn success, io_queue_init() returns 0. Otherwise, -error is return, where error is one of the Exxx values defined in the ERRORS section.

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ERRORSEFAULT  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.

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SEE ALSOio(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). 0

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