IO_CANCELSection: Linux Programmer's Manual (2)
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NAMEio_cancel - cancel an outstanding asynchronous I/O operation
#include <libaio.h> int io_cancel(aio_context_t ctx_id, struct iocb *iocb, struct io_event *result);
io_cancel() attempts to cancel an asynchronous I/O operation previously submitted with io_submit(2). ctx_id is the AIO context ID of the operation to be cancelled. If the AIO context is found, the event will be cancelled and then copied into the memory pointed to by result without being placed into the completion queue.
- The AIO context specified by ctx_id is invalid.
- One of the data structures points to invalid data.
- The iocb specified was not cancelled.
- io_cancel() is not implemented on this architecture.