1 files changed, 15 insertions, 0 deletions
diff --git a/include/qemu/main-loop.h b/include/qemu/main-loop.h
index 5764db157c..646306c272 100644
--- a/include/qemu/main-loop.h
+++ b/include/qemu/main-loop.h
@@ -263,6 +263,21 @@ AioContext *iohandler_get_aio_context(void);
 bool bql_locked(void);
 
 /**
+ * bql_block: Allow/deny releasing the BQL
+ *
+ * The Big QEMU Lock (BQL) is used to provide interior mutability to
+ * Rust code, but this only works if other threads cannot run while
+ * the Rust code has an active borrow.  This is because C code in
+ * other threads could come in and mutate data under the Rust code's
+ * feet.
+ *
+ * @increase: Whether to increase or decrease the blocking counter.
+ *            Releasing the BQL while the counter is nonzero triggers
+ *            an assertion failure.
+ */
+void bql_block_unlock(bool increase);
+
+/**
  * qemu_in_main_thread: return whether it's possible to safely access
  * the global state of the block layer.
  *