Import QEMU upstream snapshot d2e570c

Upstream: https://gitlab.com/qemu-project/qemu.git

Upstream-Commit: d2e570cc0f97b936902a5b1b86b73c0f5998b475

include/qemu/aiocb.h

@@ -0,0 +1,38 @@
+/*
+ * Data structures representing asynchronous I/O operations
+ *
+ * Copyright IBM, Corp. 2008
+ *
+ * Authors:
+ *  Anthony Liguori   <[email protected]>
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2.  See
+ * the COPYING file in the top-level directory.
+ *
+ */
+
+#ifndef QEMU_AIOCB_H
+#define QEMU_AIOCB_H
+
+typedef struct BlockAIOCB BlockAIOCB;
+typedef void BlockCompletionFunc(void *opaque, int ret);
+
+typedef struct AIOCBInfo {
+    void (*cancel_async)(BlockAIOCB *acb);
+    size_t aiocb_size;
+} AIOCBInfo;
+
+struct BlockAIOCB {
+    const AIOCBInfo *aiocb_info;
+    BlockDriverState *bs;
+    BlockCompletionFunc *cb;
+    void *opaque;
+    int refcnt;
+};
+
+void *qemu_aio_get(const AIOCBInfo *aiocb_info, BlockDriverState *bs,
+                   BlockCompletionFunc *cb, void *opaque);
+void qemu_aio_unref(void *p);
+void qemu_aio_ref(void *p);
+
+#endif