Add tbb code.

src/nvtt/TaskDispatcher.h

@@ -14,11 +14,14 @@
 #define HAVE_PPL 1
 #endif
 
-#if HAVE_PPL
+#if defined(HAVE_PPL)
 #include <array>
 //#include <ppl.h>
 #endif
 
+#if defined(HAVE_TBB)
+#include <tbb/parallel_for.h>
+#endif
 
 
 namespace nvtt {
@@ -50,12 +53,9 @@ namespace nvtt {
     struct OpenMPTaskDispatcher : public TaskDispatcher
     {
         virtual void dispatch(Task * task, void * context, size_t count) {
-            #pragma omp parallel
-            {
-                #pragma omp for
-                for (size_t i = 0; i < count; i++) {
-                    task(context, i);
-                }
+            #pragma omp parallel for
+            for (size_t i = 0; i < count; i++) {
+                task(context, i);
             }
         }
     };
@@ -83,7 +83,7 @@ namespace nvtt {
     struct TaskFunctor {
         TaskFunctor(Task * task, void * context) : task(task), context(context) {}
         void operator()(int & n) const {
-            n *= n;
+            task(context, n);
         }
         Task * task;
         void * context;
@@ -105,5 +105,25 @@ namespace nvtt {
 
 #endif
 
+#if defined(HAVE_TBB)
+
+    struct TaskFunctor {
+        TaskFunctor(Task * task, void * context) : task(task), context(context) {}
+        void operator()(int & n) const {
+            task(context, n);
+        }
+        Task * task;
+        void * context;
+    };
+
+    struct IntelTaskDispatcher : public TaskDispatcher
+    {
+        virtual void dispatch(Task * task, void * context, size_t count) {
+            parallel_for(blocked_range<size_t>(0, count, 1), TaskFunctor(task, context));
+        }
+    };
+
+#endif
+
 
 } // namespace nvtt