Several OpenMP improvements

Several optimizations based on profiling of 20M grid model. These fixes will improve the largest performance issues, but there are still more operations that can be refactored.

* OpenMP: Use in fault geometry generator
* OpenMP: Use when computing statistics for result values
* OpenMP: Use multithreading on fault detection
* Add RiaOpenMPTools
* VizFwk: Use openMP for texture generation

ApplicationLibCode/ProjectDataModel/RimContourMapProjection.cpp

@@ -18,6 +18,7 @@
 
 #include "RimContourMapProjection.h"
 
+#include "RiaOpenMPTools.h"
 #include "RiaWeightedGeometricMeanCalculator.h"
 #include "RiaWeightedHarmonicMeanCalculator.h"
 #include "RiaWeightedMeanCalculator.h"
@@ -45,10 +46,6 @@
 
 #include <algorithm>
 
-#ifdef USE_OPENMP
-#include <omp.h>
-#endif
-
 namespace caf
 {
 template <>
@@ -861,19 +858,13 @@ void RimContourMapProjection::generateTrianglesWithVertexValues()
         }
     }
 
-#ifdef USE_OPENMP
-    std::vector<std::vector<std::vector<cvf::Vec4d>>> threadTriangles( omp_get_max_threads() );
-#else
-    std::vector<std::vector<std::vector<cvf::Vec4d>>> threadTriangles( 1 );
-#endif
+    int numberOfThreads = RiaOpenMPTools::availableThreadCount();
+
+    std::vector<std::vector<std::vector<cvf::Vec4d>>> threadTriangles( numberOfThreads );
 
 #pragma omp parallel
     {
-#ifdef USE_OPENMP
-        int myThread = omp_get_thread_num();
-#else
-        int myThread = 0;
-#endif
+        int myThread = RiaOpenMPTools::currentThreadIndex();
         threadTriangles[myThread].resize( std::max( (size_t)1, m_contourPolygons.size() ) );
 
 #pragma omp for schedule( dynamic )