From 1f76aceebf3a8ed9d4d54df443c09c578562752e Mon Sep 17 00:00:00 2001 From: Kevin Wolf Date: Thu, 22 Oct 2009 17:54:36 +0200 Subject: Add qemu_aio_process_queue() We'll leave some AIO completions unhandled when we can't call the callback. qemu_aio_process_queue() is used later to run any callbacks that are left and can be run then. Signed-off-by: Kevin Wolf Signed-off-by: Anthony Liguori --- qemu-aio.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'qemu-aio.h') diff --git a/qemu-aio.h b/qemu-aio.h index f262344af3..3bdd749f80 100644 --- a/qemu-aio.h +++ b/qemu-aio.h @@ -20,6 +20,11 @@ /* Returns 1 if there are still outstanding AIO requests; 0 otherwise */ typedef int (AioFlushHandler)(void *opaque); +/* Runs all currently allowed AIO callbacks of completed requests in the + * respective AIO backend. Returns 0 if no requests was handled, non-zero + * if at least one queued request was handled. */ +typedef int (AioProcessQueue)(void *opaque); + /* Flush any pending AIO operation. This function will block until all * outstanding AIO operations have been completed or cancelled. */ void qemu_aio_flush(void); @@ -30,6 +35,13 @@ void qemu_aio_flush(void); * result of executing I/O completion or bh callbacks. */ void qemu_aio_wait(void); +/* + * Runs all currently allowed AIO callbacks of completed requests. Returns 0 + * if no requests were handled, non-zero if at least one request was + * processed. + */ +int qemu_aio_process_queue(void); + /* Register a file descriptor and associated callbacks. Behaves very similarly * to qemu_set_fd_handler2. Unlike qemu_set_fd_handler2, these callbacks will * be invoked when using either qemu_aio_wait() or qemu_aio_flush(). @@ -41,6 +53,7 @@ int qemu_aio_set_fd_handler(int fd, IOHandler *io_read, IOHandler *io_write, AioFlushHandler *io_flush, + AioProcessQueue *io_process_queue, void *opaque); #endif -- cgit v1.2.3