vector scaling example: define cpu codelet in a separate file

examples/Makefile.am

@@ -140,7 +140,8 @@ examplebin_PROGRAMS +=				\
 	basic_examples/vector_scal
 
 basic_examples_vector_scal_SOURCES =		\
-	basic_examples/vector_scal.c
+	basic_examples/vector_scal.c		\
+	basic_examples/vector_scal_cpu.c
 
 if STARPU_USE_CUDA
 basic_examples_vector_scal_SOURCES +=		\

examples/basic_examples/vector_scal.c

@@ -30,38 +30,7 @@
 
 #define	NX	2048
 
-/* This kernel takes a buffer and scales it by a constant factor */
-static void scal_cpu_func(void *buffers[], void *cl_arg)
-{
-	unsigned i;
-	float *factor = cl_arg;
-
-	/* 
-	 * The "buffers" array matches the task->buffers array: for instance
-	 * task->buffers[0].handle is a handle that corresponds to a data with
-	 * vector "interface", so that the first entry of the array in the
-	 * codelet  is a pointer to a structure describing such a vector (ie.
-	 * struct starpu_vector_interface_s *). Here, we therefore manipulate
-	 * the buffers[0] element as a vector: nx gives the number of elements
-	 * in the array, ptr gives the location of the array (that was possibly
-	 * migrated/replicated), and elemsize gives the size of each elements.
-	 */
-
-	starpu_vector_interface_t *vector = buffers[0];
-
-	/* length of the vector */
-	unsigned n = STARPU_GET_VECTOR_NX(vector);
-
-	/* get a pointer to the local copy of the vector : note that we have to
-	 * cast it in (float *) since a vector could contain any type of
-	 * elements so that the .ptr field is actually a uintptr_t */
-	float *val = (float *)STARPU_GET_VECTOR_PTR(vector);
-
-	/* scale the vector */
-	for (i = 0; i < n; i++)
-		val[i] *= *factor;
-}
-
+extern void scal_cpu_func(void *buffers[], void *_args);
 extern void scal_cuda_func(void *buffers[], void *_args);
 extern void scal_opencl_func(void *buffers[], void *_args);
 

examples/basic_examples/vector_scal_cpu.c

@@ -0,0 +1,54 @@
+/*
+ * StarPU
+ * Copyright (C) INRIA 2008-2010 (see AUTHORS file)
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License as published by
+ * the Free Software Foundation; either version 2.1 of the License, or (at
+ * your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
+ *
+ * See the GNU Lesser General Public License in COPYING.LGPL for more details.
+ */
+
+/*
+ * This example complements vector_scale.c: here we implement a CPU version.
+ */
+
+#include <starpu.h>
+
+/* This kernel takes a buffer and scales it by a constant factor */
+void scal_cpu_func(void *buffers[], void *cl_arg)
+{
+	unsigned i;
+	float *factor = cl_arg;
+
+	/* 
+	 * The "buffers" array matches the task->buffers array: for instance
+	 * task->buffers[0].handle is a handle that corresponds to a data with
+	 * vector "interface", so that the first entry of the array in the
+	 * codelet  is a pointer to a structure describing such a vector (ie.
+	 * struct starpu_vector_interface_s *). Here, we therefore manipulate
+	 * the buffers[0] element as a vector: nx gives the number of elements
+	 * in the array, ptr gives the location of the array (that was possibly
+	 * migrated/replicated), and elemsize gives the size of each elements.
+	 */
+
+	starpu_vector_interface_t *vector = buffers[0];
+
+	/* length of the vector */
+	unsigned n = STARPU_GET_VECTOR_NX(vector);
+
+	/* get a pointer to the local copy of the vector : note that we have to
+	 * cast it in (float *) since a vector could contain any type of
+	 * elements so that the .ptr field is actually a uintptr_t */
+	float *val = (float *)STARPU_GET_VECTOR_PTR(vector);
+
+	/* scale the vector */
+	for (i = 0; i < n; i++)
+		val[i] *= *factor;
+}
+