1 // -*- mode:C++; tab-width:8; c-basic-offset:2; indent-tabs-mode:t -*-
2 // vim: ts=8 sw=2 smarttab
10 #include <boost/intrusive/list.hpp>
11 #include <boost/container/small_vector.hpp>
13 #include "include/buffer.h"
14 #include "include/types.h"
17 struct iocb iocb; // must be first element; see shenanigans in aio_queue_t
20 boost::container::small_vector<iovec,4> iov;
21 uint64_t offset, length;
23 bufferlist bl; ///< write payload (so that it remains stable for duration)
25 boost::intrusive::list_member_hook<> queue_item;
27 aio_t(void *p, int f) : priv(p), fd(f), offset(0), length(0), rval(-1000) {
30 void pwritev(uint64_t _offset, uint64_t len) {
33 io_prep_pwritev(&iocb, fd, &iov[0], iov.size(), offset);
35 void pread(uint64_t _offset, uint64_t len) {
38 bufferptr p = buffer::create_page_aligned(length);
39 io_prep_pread(&iocb, fd, p.c_str(), length, offset);
40 bl.append(std::move(p));
43 int get_return_value() {
48 typedef boost::intrusive::list<
50 boost::intrusive::member_hook<
52 boost::intrusive::list_member_hook<>,
53 &aio_t::queue_item> > aio_list_t;
59 typedef list<aio_t>::iterator aio_iter;
61 explicit aio_queue_t(unsigned max_iodepth)
62 : max_iodepth(max_iodepth),
71 int r = io_setup(max_iodepth, &ctx);
82 int r = io_destroy(ctx);
88 int submit(aio_t &aio, int *retries);
89 int submit_batch(aio_iter begin, aio_iter end, uint16_t aios_size,
90 void *priv, int *retries);
91 int get_next_completed(int timeout_ms, aio_t **paio, int max);