Annotation of qemu/block/raw-posix-aio.h, revision 1.1.1.1

1.1       root        1: /*
                      2:  * QEMU Posix block I/O backend AIO support
                      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: #ifndef QEMU_RAW_POSIX_AIO_H
                     14: #define QEMU_RAW_POSIX_AIO_H
                     15: 
                     16: /* AIO request types */
                     17: #define QEMU_AIO_READ         0x0001
                     18: #define QEMU_AIO_WRITE        0x0002
                     19: #define QEMU_AIO_IOCTL        0x0004
                     20: #define QEMU_AIO_FLUSH        0x0008
                     21: #define QEMU_AIO_TYPE_MASK \
                     22:        (QEMU_AIO_READ|QEMU_AIO_WRITE|QEMU_AIO_IOCTL|QEMU_AIO_FLUSH)
                     23: 
                     24: /* AIO flags */
                     25: #define QEMU_AIO_MISALIGNED   0x1000
                     26: 
                     27: 
                     28: /* posix-aio-compat.c - thread pool based implementation */
                     29: int paio_init(void);
                     30: BlockDriverAIOCB *paio_submit(BlockDriverState *bs, int fd,
                     31:         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
                     32:         BlockDriverCompletionFunc *cb, void *opaque, int type);
                     33: BlockDriverAIOCB *paio_ioctl(BlockDriverState *bs, int fd,
                     34:         unsigned long int req, void *buf,
                     35:         BlockDriverCompletionFunc *cb, void *opaque);
                     36: 
                     37: /* linux-aio.c - Linux native implementation */
                     38: void *laio_init(void);
                     39: BlockDriverAIOCB *laio_submit(BlockDriverState *bs, void *aio_ctx, int fd,
                     40:         int64_t sector_num, QEMUIOVector *qiov, int nb_sectors,
                     41:         BlockDriverCompletionFunc *cb, void *opaque, int type);
                     42: 
                     43: #endif /* QEMU_RAW_POSIX_AIO_H */

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