aio: make AioContexts GSources

This lets AioContexts be used (optionally) with a glib main loop.

Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 23 insertions, 0 deletions

diff --git a/qemu-aio.h b/qemu-aio.h
index ac248962fe..aedf66cfa1 100644
--- a/qemu-aio.h
+++ b/qemu-aio.h
@@ -44,6 +44,8 @@ typedef void QEMUBHFunc(void *opaque);
 typedef void IOHandler(void *opaque);
 
 typedef struct AioContext {
+    GSource source;
+
     /* The list of registered AIO handlers */
     QLIST_HEAD(, AioHandler) aio_handlers;
 
@@ -75,6 +77,22 @@ typedef int (AioFlushEventNotifierHandler)(EventNotifier *e);
 AioContext *aio_context_new(void);
 
 /**
+ * aio_context_ref:
+ * @ctx: The AioContext to operate on.
+ *
+ * Add a reference to an AioContext.
+ */
+void aio_context_ref(AioContext *ctx);
+
+/**
+ * aio_context_unref:
+ * @ctx: The AioContext to operate on.
+ *
+ * Drop a reference to an AioContext.
+ */
+void aio_context_unref(AioContext *ctx);
+
+/**
  * aio_bh_new: Allocate a new bottom half structure.
  *
  * Bottom halves are lightweight callbacks whose invocation is guaranteed
@@ -188,6 +206,11 @@ void aio_set_event_notifier(AioContext *ctx,
                             EventNotifierHandler *io_read,
                             AioFlushEventNotifierHandler *io_flush);
 
+/* Return a GSource that lets the main loop poll the file descriptors attached
+ * to this AioContext.
+ */
+GSource *aio_get_g_source(AioContext *ctx);
+
 /* Functions to operate on the main QEMU AioContext.  */
 
 void qemu_aio_flush(void);