File:  [Qemu by Fabrice Bellard] / qemu / posix-aio-compat.h
Revision 1.1.1.1 (vendor branch): download - view: text, annotated - select for diffs
Tue Apr 24 16:50:20 2018 UTC (3 years, 1 month ago) by root
Branches: qemu, MAIN
CVS tags: qemu0105, qemu0104, qemu0103, qemu0102, qemu0101, qemu0100, HEAD
qemu 0.10.0

    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:     int ev_signo;
   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

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