diff options
Diffstat (limited to 'qemu-aio.h')
| -rw-r--r-- | qemu-aio.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/qemu-aio.h b/qemu-aio.h index f8a93d8fb9..f19201e7ca 100644 --- a/qemu-aio.h +++ b/qemu-aio.h @@ -133,13 +133,22 @@ void qemu_bh_delete(QEMUBH *bh); * outstanding AIO operations have been completed or cancelled. */ void aio_flush(AioContext *ctx); -/* Wait for a single AIO completion to occur. This function will wait - * until a single AIO event has completed and it will ensure something - * has moved before returning. This can issue new pending aio as - * result of executing I/O completion or bh callbacks. +/* Progress in completing AIO work to occur. This can issue new pending + * aio as a result of executing I/O completion or bh callbacks. * - * Return whether there is still any pending AIO operation. */ -bool aio_wait(AioContext *ctx); + * If there is no pending AIO operation or completion (bottom half), + * return false. If there are pending bottom halves, return true. + * + * If there are no pending bottom halves, but there are pending AIO + * operations, it may not be possible to make any progress without + * blocking. If @blocking is true, this function will wait until one + * or more AIO events have completed, to ensure something has moved + * before returning. + * + * If @blocking is false, this function will also return false if the + * function cannot make any progress without blocking. + */ +bool aio_poll(AioContext *ctx, bool blocking); #ifdef CONFIG_POSIX /* Returns 1 if there are still outstanding AIO requests; 0 otherwise */ |