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#include <libaio.h>
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int io_setup (int maxevents, io_context_t *ctxp);
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io_setup() creates an asynchronous I/O context capable of receiving at least maxevents. ctxp must not point to an AIO context that already exists, and must be initialized to 0 prior to the call. On successful creation of the AIO context, *ctxp is filled in with the resulting handle.
io_setup() returns 0 on success; otherwise, one of the errors listed in the "Errors" section is returned.
Tag | Description |
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EINVAL |
ctxp is not initialized, or the specified maxevents
exceeds internal limits. maxevents should be greater than 0.
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EFAULT |
An invalid pointer is passed for ctxp.
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ENOMEM |
Insufficient kernel resources are available.
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EAGAIN |
The specified maxevents exceeds the users limit of available events.
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ENOSYS |
io_setup() is not implemented on this architecture.
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io_setup() is Linux specific and should not be used in programs that are intended to be portable.
The asynchronous I/O system calls first appeared in Linux 2.5, August 2002.
io_destroy(2), io_getevents(2), io_submit(2), io_cancel(2).
The asynchronous I/O system calls were written by Benjamin LaHaise.
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