From 5cefca444f7062c61cc9d118ffea5901e05186fd Mon Sep 17 00:00:00 2001
From: Boris Kolpackov <boris@codesynthesis.com>
Date: Wed, 8 Feb 2017 07:42:41 +0200
Subject: Implement parallel operation execution

---
 build2/algorithm.ixx | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

(limited to 'build2/algorithm.ixx')

diff --git a/build2/algorithm.ixx b/build2/algorithm.ixx
index b8c33d4..9ff56f8 100644
--- a/build2/algorithm.ixx
+++ b/build2/algorithm.ixx
@@ -172,12 +172,41 @@ namespace build2
     search_and_match_prerequisite_members (ml, a, t, &s);
   }
 
+  target_state
+  execute (action, const target&, size_t, atomic_count*);
+
+  inline target_state
+  execute (action a, const target& t)
+  {
+    return execute (a, t, 0, nullptr);
+  }
+
+  inline target_state
+  execute_async (action a, const target& t, size_t sc, atomic_count& tc)
+  {
+    return execute (a, t, sc, &tc);
+  }
+
   inline target_state
   execute_delegate (const recipe& r, action a, const target& t)
   {
     return r (a, t);
   }
 
+  inline target_state
+  execute_prerequisites (action a, const target& t)
+  {
+    auto& p (t.prerequisite_targets);
+    return straight_execute_members (a, t, p.data (), p.size ());
+  }
+
+  inline target_state
+  reverse_execute_prerequisites (action a, const target& t)
+  {
+    auto& p (t.prerequisite_targets);
+    return reverse_execute_members (a, t, p.data (), p.size ());
+  }
+
   // If the first argument is NULL, then the result is treated as a boolean
   // value.
   //
@@ -220,4 +249,12 @@ namespace build2
     auto p (execute_prerequisites (tt, a, t, mt, pf));
     return make_pair (static_cast<const T*> (p.first), p.second);
   }
+
+  inline target_state
+  execute_members (action a, const target& t, const target* ts[], size_t n)
+  {
+    return current_mode == execution_mode::first
+      ? straight_execute_members (a, t, ts, n)
+      : reverse_execute_members (a, t, ts, n);
+  }
 }
-- 
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