From abccaf9596461215fce0e32322133fb6c39be44f Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Fri, 10 Feb 2017 08:15:48 +0200
Subject: Implement parallel error propagation, keep_going mode

Keep going is the default but there is now the -s|--serial-stop that makes
the driver run serially and stop at first error.

Also fix some lockups, other minor improvements/features.
---
 build2/target.ixx | 35 +++++++++++++++++++++++------------
 1 file changed, 23 insertions(+), 12 deletions(-)

(limited to 'build2/target.ixx')

diff --git a/build2/target.ixx b/build2/target.ixx
index a097e39..b73acd7 100644
--- a/build2/target.ixx
+++ b/build2/target.ixx
@@ -26,18 +26,7 @@ namespace build2
   }
 
   inline target_state target::
-  atomic_state () const
-  {
-    switch (task_count)
-    {
-    case target::count_unexecuted: return target_state::unknown;
-    case target::count_executed:   return synchronized_state ();
-    default:                       return target_state::busy;
-    }
-  }
-
-  inline target_state target::
-  synchronized_state () const
+  state () const
   {
     // We go an extra step and short-circuit to the target state even if the
     // raw state is not group provided the recipe is group_recipe.
@@ -57,6 +46,28 @@ namespace build2
     return state_;
   }
 
+  inline target_state target::
+  synchronized_state (bool fail) const
+  {
+    target_state r (state ());
+
+    if (fail && r == target_state::failed)
+      throw failed ();
+
+    return r;
+  }
+
+  inline target_state target::
+  atomic_state (bool fail) const
+  {
+    switch (task_count)
+    {
+    case target::count_unexecuted: return target_state::unknown;
+    case target::count_executed:   return synchronized_state (fail);
+    default:                       return target_state::busy;
+    }
+  }
+
   // prerequisite_member
   //
   inline prerequisite prerequisite_member::
-- 
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