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[qemu.git] / posix-aio-compat.h
1 /*
2 * QEMU posix-aio emulation
3 *
4 * Copyright IBM, Corp. 2008
5 *
6 * Authors:
7 * Anthony Liguori <aliguori@us.ibm.com>
8 *
9 * This work is licensed under the terms of the GNU GPL, version 2. See
10 * the COPYING file in the top-level directory.
11 *
12 */
13
14 #ifndef QEMU_POSIX_AIO_COMPAT_H
15 #define QEMU_POSIX_AIO_COMPAT_H
16
17 #include <sys/types.h>
18 #include <unistd.h>
19 #include <signal.h>
20
21 #include "sys-queue.h"
22
23 #define QEMU_PAIO_CANCELED 0x01
24 #define QEMU_PAIO_NOTCANCELED 0x02
25 #define QEMU_PAIO_ALLDONE 0x03
26
27 struct qemu_paiocb
28 {
29 int aio_fildes;
30 void *aio_buf;
31 size_t aio_nbytes;
32 struct sigevent aio_sigevent;
33 off_t aio_offset;
34
35 /* private */
36 TAILQ_ENTRY(qemu_paiocb) node;
37 int is_write;
38 ssize_t ret;
39 int active;
40 };
41
42 struct qemu_paioinit
43 {
44 unsigned int aio_threads;
45 unsigned int aio_num;
46 unsigned int aio_idle_time;
47 };
48
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);
55
56 #endif