Ajout de l'ensemble du workspace.

[GPU.git] / WCudaMSE / Student_OMP / src / cpp / core / omp / 02_pi / 06_pi_for_atomic.cpp

diff --git a/WCudaMSE/Student_OMP/src/cpp/core/omp/02_pi/06_pi_for_atomic.cpp b/WCudaMSE/Student_OMP/src/cpp/core/omp/02_pi/06_pi_for_atomic.cpp
new file mode 100755 (executable)
index 0000000..ca8878b
--- /dev/null
+++ b/WCudaMSE/Student_OMP/src/cpp/core/omp/02_pi/06_pi_for_atomic.cpp
@@ -0,0 +1,67 @@
+#include <omp.h>\r
+#include "00_pi_tools.h"\r
+#include "OmpTools.h"\r
+\r
+/*----------------------------------------------------------------------*\\r
+ |*                    Declaration                                     *|\r
+ \*---------------------------------------------------------------------*/\r
+\r
+/*--------------------------------------*\\r
+ |*            Imported                *|\r
+ \*-------------------------------------*/\r
+\r
+\r
+\r
+/*--------------------------------------*\\r
+ |*            Public                  *|\r
+ \*-------------------------------------*/\r
+\r
+bool isPiOMPforAtomic_Ok(int n);\r
+\r
+/*--------------------------------------*\\r
+ |*            Private                 *|\r
+ \*-------------------------------------*/\r
+\r
+static double piOMPforAtomic(int n);\r
+\r
+/*----------------------------------------------------------------------*\\r
+ |*                    Implementation                                  *|\r
+ \*---------------------------------------------------------------------*/\r
+\r
+/*--------------------------------------*\\r
+ |*            Public                  *|\r
+ \*-------------------------------------*/\r
+\r
+bool isPiOMPforAtomic_Ok(int n)\r
+    {\r
+    return isAlgoPI_OK(piOMPforAtomic, n, "Pi OMP for atomic");\r
+    }\r
+\r
+/*--------------------------------------*\\r
+ |*            Private                 *|\r
+ \*-------------------------------------*/\r
+\r
+/**\r
+ * synchronisation couteuse!\r
+ */\r
+double piOMPforAtomic(int n)\r
+    {\r
+    double sum = 0;\r
+    double xi;\r
+    const double DX = 1.0/(double)n;\r
+\r
+    #pragma omp parralel for private(xi)\r
+       for (int i = 0; i < n; i++)\r
+           {\r
+           xi = i*DX;\r
+           #pragma omp atomic\r
+               sum += fpi(xi); // Uniquement l'operateur += est atomi, 'fpi' est exécuté en parralèle.\r
+           }\r
+\r
+    return sum * DX;\r
+    }\r
+\r
+/*----------------------------------------------------------------------*\\r
+ |*                    End                                             *|\r
+ \*---------------------------------------------------------------------*/\r
+\r