diff options
Diffstat (limited to 'posix-aio-compat.h')
| -rw-r--r-- | posix-aio-compat.h | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/posix-aio-compat.h b/posix-aio-compat.h new file mode 100644 index 0000000000..5dddd711a9 --- /dev/null +++ b/posix-aio-compat.h @@ -0,0 +1,56 @@ +/* + * QEMU posix-aio emulation + * + * Copyright IBM, Corp. 2008 + * + * Authors: + * Anthony Liguori <aliguori@us.ibm.com> + * + * This work is licensed under the terms of the GNU GPL, version 2. See + * the COPYING file in the top-level directory. + * + */ + +#ifndef QEMU_POSIX_AIO_COMPAT_H +#define QEMU_POSIX_AIO_COMPAT_H + +#include <sys/types.h> +#include <unistd.h> +#include <signal.h> + +#include "sys-queue.h" + +#define QEMU_PAIO_CANCELED 0x01 +#define QEMU_PAIO_NOTCANCELED 0x02 +#define QEMU_PAIO_ALLDONE 0x03 + +struct qemu_paiocb +{ + int aio_fildes; + void *aio_buf; + size_t aio_nbytes; + struct sigevent aio_sigevent; + off_t aio_offset; + + /* private */ + TAILQ_ENTRY(qemu_paiocb) node; + int is_write; + ssize_t ret; + int active; +}; + +struct qemu_paioinit +{ + unsigned int aio_threads; + unsigned int aio_num; + unsigned int aio_idle_time; +}; + +int qemu_paio_init(struct qemu_paioinit *aioinit); +int qemu_paio_read(struct qemu_paiocb *aiocb); +int qemu_paio_write(struct qemu_paiocb *aiocb); +int qemu_paio_error(struct qemu_paiocb *aiocb); +ssize_t qemu_paio_return(struct qemu_paiocb *aiocb); +int qemu_paio_cancel(int fd, struct qemu_paiocb *aiocb); + +#endif |