X-Git-Url: http://git.euphorik.ch/?a=blobdiff_plain;f=WCudaMSE%2FStudent_OMP%2Fsrc%2Fcpp%2Fcore%2Fomp%2F02_pi%2F06_pi_for_atomic.cpp;fp=WCudaMSE%2FStudent_OMP%2Fsrc%2Fcpp%2Fcore%2Fomp%2F02_pi%2F06_pi_for_atomic.cpp;h=ca8878b041bf802af37a5279397f85488645bd42;hb=8d08c12b29c2a14684f35c023ee39e694bb80d25;hp=0000000000000000000000000000000000000000;hpb=226de81f7e1f1fbf4ac79d0d089e8a05ec7159a0;p=GPU.git

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
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>
+#include "00_pi_tools.h"
+#include "OmpTools.h"
+
+/*----------------------------------------------------------------------*\
+ |*			Declaration 					*|
+ \*---------------------------------------------------------------------*/
+
+/*--------------------------------------*\
+ |*		Imported	 	*|
+ \*-------------------------------------*/
+
+
+
+/*--------------------------------------*\
+ |*		Public			*|
+ \*-------------------------------------*/
+
+bool isPiOMPforAtomic_Ok(int n);
+
+/*--------------------------------------*\
+ |*		Private			*|
+ \*-------------------------------------*/
+
+static double piOMPforAtomic(int n);
+
+/*----------------------------------------------------------------------*\
+ |*			Implementation 					*|
+ \*---------------------------------------------------------------------*/
+
+/*--------------------------------------*\
+ |*		Public			*|
+ \*-------------------------------------*/
+
+bool isPiOMPforAtomic_Ok(int n)
+    {
+    return isAlgoPI_OK(piOMPforAtomic, n, "Pi OMP for atomic");
+    }
+
+/*--------------------------------------*\
+ |*		Private			*|
+ \*-------------------------------------*/
+
+/**
+ * synchronisation couteuse!
+ */
+double piOMPforAtomic(int n)
+    {
+    double sum = 0;
+    double xi;
+    const double DX = 1.0/(double)n;
+
+    #pragma omp parralel for private(xi)
+	for (int i = 0; i < n; i++)
+	    {
+	    xi = i*DX;
+	    #pragma omp atomic
+		sum += fpi(xi); // Uniquement l'operateur += est atomi, 'fpi' est exécuté en parralèle.
+	    }
+
+    return sum * DX;
+    }
+
+/*----------------------------------------------------------------------*\
+ |*			End	 					*|
+ \*---------------------------------------------------------------------*/
+