From 02c20fb4afc1167cef27865697c0fc6a8d366128 Mon Sep 17 00:00:00 2001
From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Wed, 24 Mar 2021 19:31:18 +0000
Subject: [PATCH] updates: Provide PrepareUpdatesBuffer::spontaneous_image

Signed-off-by: Ian Jackson <ijackson@chiark.greenend.org.uk>
---
 src/clock.rs   |  4 +---
 src/updates.rs | 10 ++++++++++
 2 files changed, 11 insertions(+), 3 deletions(-)

diff --git a/src/clock.rs b/src/clock.rs
index 91faf833..6be53166 100644
--- a/src/clock.rs
+++ b/src/clock.rs
@@ -379,9 +379,7 @@ impl ThreadState {
           None
         };
 
-      let mut updates = PrepareUpdatesBuffer::new(&mut ig, None, None);
-      updates.piece_update_image(self.piece)?;
-      updates.finish();
+      PrepareUpdatesBuffer::spontaneous_image(&mut ig, self.piece, None)?;
     }
   }
 }
diff --git a/src/updates.rs b/src/updates.rs
index 5d0ba952..d9e8551e 100644
--- a/src/updates.rs
+++ b/src/updates.rs
@@ -554,6 +554,16 @@ impl<'r> PrepareUpdatesBuffer<'r> {
     }
   }
 
+  #[throws(IE)]
+  pub fn spontaneous_image(g: &'r mut Instance,
+                           piece: PieceId,
+                           estimate: Option<usize>)
+  {
+    let mut updates = PrepareUpdatesBuffer::new(g, None, estimate);
+    updates.piece_update_image(piece)?;
+    updates.finish();
+  }
+
   pub fn gen(&mut self) -> Generation {
     let gs = &mut self.g.gs;
     *self.gen.get_or_insert_with(||{
-- 
2.30.2