From 7cd2c81a93aee9b19205f816bb475f82d9dbdea6 Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Sat, 29 Jul 2017 14:34:16 +0200
Subject: Add progress monitoring for serial execution

---
 build2/scheduler.txx | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'build2/scheduler.txx')

diff --git a/build2/scheduler.txx b/build2/scheduler.txx
index b62acdb..c7e6ef2 100644
--- a/build2/scheduler.txx
+++ b/build2/scheduler.txx
@@ -24,6 +24,21 @@ namespace build2
     if (max_active_ == 1)
     {
       forward<F> (f) (forward<A> (a)...);
+
+      // See if we need to call the monitor (see the concurrent version in
+      // execute() for details).
+      //
+      if (monitor_count_ != nullptr)
+      {
+        size_t v (monitor_count_->load (memory_order_relaxed));
+        if (v != monitor_init_)
+        {
+          size_t t (monitor_tshold_.load (memory_order_relaxed));
+          if (v > monitor_init_ ? (v >= t) : (v <= t))
+            monitor_tshold_.store (monitor_func_ (v), memory_order_relaxed);
+        }
+      }
+
       return false;
     }
 
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