* True parallel builds. Nix can now run as many build jobs in

  parallel as possible (similar to GNU Make's `-j' switch).  This is
  useful on SMP systems, but it is especially useful for doing builds
  on multiple machines.  The idea is that a large derivation is
  initiated on one master machine, which then distributes
  sub-derivations to any number of slave machines.  This should not
  happen synchronously or in lock-step, so the master must be capable
  of dealing with multiple parallel build jobs.  We now have the
  infrastructure to support this.

  TODO: substitutes are currently broken.

1 files changed, 3 insertions, 1 deletions

diff --git a/src/libstore/pathlocks.hh b/src/libstore/pathlocks.hh
index 606ae91c0..433438906 100644
--- a/src/libstore/pathlocks.hh
+++ b/src/libstore/pathlocks.hh
@@ -17,7 +17,9 @@ private:
     bool deletePaths;
 
 public:
-    PathLocks(const PathSet & _paths);
+    PathLocks();
+    PathLocks(const PathSet & paths);
+    void lockPaths(const PathSet & _paths);
     ~PathLocks();
     void setDeletion(bool deletePaths);
 };