Initial take on build2-based build

Only C++11 is supported with GCC 4.8 and up and VC 14 and up.

This change also introduces the ODB_THREADS_CXX11 threading model. It
is the default for the build2 build but can be disabled with a global
ODB_THREADS_NONE define (global means that it should be in effect both
when building and using the library).

1 files changed, 24 insertions, 1 deletions

diff --git a/odb/details/condition.hxx b/odb/details/condition.hxx
index cf22a70..1baa81b 100644
--- a/odb/details/condition.hxx
+++ b/odb/details/condition.hxx
@@ -17,6 +17,8 @@ namespace odb
   namespace details
   {
     class mutex;
+    class lock;
+
     class LIBODB_EXPORT condition
     {
     public:
@@ -26,7 +28,7 @@ namespace odb
       signal () {}
 
       void
-      wait () {}
+      wait (lock&) {}
 
     private:
       condition (const condition&);
@@ -35,6 +37,27 @@ namespace odb
   }
 }
 
+#elif defined(ODB_THREADS_CXX11)
+#  include <condition_variable>
+#  include <odb/details/lock.hxx>
+
+namespace odb
+{
+  namespace details
+  {
+    class mutex;
+
+    class condition: public std::condition_variable
+    {
+    public:
+      condition (mutex&) {}
+
+      void
+      signal () {notify_one ();}
+    };
+  }
+}
+
 #elif defined(ODB_THREADS_POSIX)
 #include <odb/details/posix/condition.hxx>
 #elif defined(ODB_THREADS_WIN32)