Implement displaying build progress (--progress|-p)

1 files changed, 11 insertions, 0 deletions

diff --git a/build2/scheduler.cxx b/build2/scheduler.cxx
index fdf4121..65684eb 100644
--- a/build2/scheduler.cxx
+++ b/build2/scheduler.cxx
@@ -388,6 +388,17 @@ namespace build2
     return r;
   }
 
+  scheduler::monitor_guard scheduler::
+  monitor (atomic_count& c, size_t t, function<size_t (size_t)> f)
+  {
+    assert (monitor_count_ == nullptr && t != 0);
+    monitor_count_ = &c;
+    monitor_tshold_.store (t, memory_order_relaxed);
+    monitor_init_ = c.load (memory_order_relaxed);
+    monitor_func_ = move (f);
+    return monitor_guard (this);
+  }
+
   void scheduler::
   activate_helper (lock& l)
   {