Refactor aio callback allocation to use an aiocb pool (Avi Kivity)
[sniper_test.git] / posix-aio-compat.h
blob0bc10f5e08cba1b779f12277f3ed88c330018fe1
1 /*
2 * QEMU posix-aio emulation
4 * Copyright IBM, Corp. 2008
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
14 #ifndef QEMU_POSIX_AIO_COMPAT_H
15 #define QEMU_POSIX_AIO_COMPAT_H
17 #include <sys/types.h>
18 #include <unistd.h>
19 #include <signal.h>
21 #include "sys-queue.h"
23 #define QEMU_PAIO_CANCELED 0x01
24 #define QEMU_PAIO_NOTCANCELED 0x02
25 #define QEMU_PAIO_ALLDONE 0x03
27 struct qemu_paiocb
29 int aio_fildes;
30 void *aio_buf;
31 size_t aio_nbytes;
32 int ev_signo;
33 off_t aio_offset;
35 /* private */
36 TAILQ_ENTRY(qemu_paiocb) node;
37 int is_write;
38 ssize_t ret;
39 int active;
42 struct qemu_paioinit
44 unsigned int aio_threads;
45 unsigned int aio_num;
46 unsigned int aio_idle_time;
49 int qemu_paio_init(struct qemu_paioinit *aioinit);
50 int qemu_paio_read(struct qemu_paiocb *aiocb);
51 int qemu_paio_write(struct qemu_paiocb *aiocb);
52 int qemu_paio_error(struct qemu_paiocb *aiocb);
53 ssize_t qemu_paio_return(struct qemu_paiocb *aiocb);
54 int qemu_paio_cancel(int fd, struct qemu_paiocb *aiocb);
56 #endif