Add a test to make sure that implicit data dependencies are working properly.

tests/Makefile.am

@@ -90,6 +90,7 @@ check_PROGRAMS += 				\
 	core/declare_deps_after_submission	\
 	core/declare_deps_after_submission_synchronous	\
 	core/get_current_task			\
+	datawizard/data_implicit_deps		\
 	datawizard/sync_and_notify_data		\
 	datawizard/dsm_stress			\
 	datawizard/write_only_tmp_buffer	\
@@ -173,6 +174,10 @@ core_declare_deps_after_submission_synchronous_SOURCES =	\
 core_get_current_task_SOURCES =			\
 	core/get_current_task.c
 
+
+datawizard_data_implicit_deps_SOURCES =		\
+	datawizard/data_implicit_deps.c
+
 datawizard_dsm_stress_SOURCES =			\
 	datawizard/dsm_stress.c
 

tests/datawizard/data_implicit_deps.c

@@ -0,0 +1,122 @@
+/*
+ * StarPU
+ * Copyright (C) INRIA 2008-2009 (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.
+ */
+
+#include <stdio.h>
+#include <unistd.h>
+#include <errno.h>
+#include <starpu.h>
+#include <stdlib.h>
+
+#define VECTORSIZE	1024
+
+static unsigned *A, *B, *C, *D;
+starpu_data_handle A_handle, B_handle, C_handle, D_handle;
+
+static unsigned var = 0;
+
+static void f(void *descr[], __attribute__ ((unused)) void *_args)
+{
+	usleep(200000);
+}
+
+static starpu_codelet cl_f = {
+	.where = STARPU_CPU|STARPU_CUDA,
+	.cpu_func = f,
+	.cuda_func = f,
+	.nbuffers = 2
+};
+
+static void g(void *descr[], __attribute__ ((unused)) void *_args)
+{
+	usleep(100000);
+	var = 42;
+}
+
+static starpu_codelet cl_g = {
+	.where = STARPU_CPU|STARPU_CUDA,
+	.cpu_func = g,
+	.cuda_func = g,
+	.nbuffers = 2
+};
+
+static void h(void *descr[], __attribute__ ((unused)) void *_args)
+{
+	fprintf(stderr, "VAR %d (should be 42)\n", var);
+	STARPU_ASSERT(var == 42);
+}
+
+static starpu_codelet cl_h = {
+	.where = STARPU_CPU|STARPU_CUDA,
+	.cpu_func = h,
+	.cuda_func = h,
+	.nbuffers = 2
+};
+
+int main(int argc, char **argv)
+{
+	starpu_init(NULL);
+
+	A = malloc(VECTORSIZE*sizeof(unsigned));
+	B = malloc(VECTORSIZE*sizeof(unsigned));
+	C = malloc(VECTORSIZE*sizeof(unsigned));
+	D = malloc(VECTORSIZE*sizeof(unsigned));
+
+	starpu_register_vector_data(&A_handle, 0, (uintptr_t)A, VECTORSIZE, sizeof(unsigned));
+	starpu_register_vector_data(&B_handle, 0, (uintptr_t)B, VECTORSIZE, sizeof(unsigned));
+	starpu_register_vector_data(&C_handle, 0, (uintptr_t)C, VECTORSIZE, sizeof(unsigned));
+	starpu_register_vector_data(&D_handle, 0, (uintptr_t)D, VECTORSIZE, sizeof(unsigned));
+
+	#if 0
+	starpu_data_set_sequential_consistency_flag(A_handle, 0);
+	starpu_data_set_sequential_consistency_flag(B_handle, 0);
+	starpu_data_set_sequential_consistency_flag(C_handle, 0);
+	starpu_data_set_sequential_consistency_flag(D_handle, 0);
+	#endif
+
+	/* 	f(Ar, Brw): sleep 
+	 *	g(Br; Crw); sleep, var = 42
+	 *	h(Cr; Drw); check that var == 42
+	 */
+	struct starpu_task *task_f = starpu_task_create();
+	task_f->cl = &cl_f;
+	task_f->buffers[0].handle = A_handle;
+	task_f->buffers[0].mode = STARPU_R;
+	task_f->buffers[1].handle = B_handle;
+	task_f->buffers[1].mode = STARPU_RW;
+	starpu_submit_task(task_f);
+
+	struct starpu_task *task_g = starpu_task_create();
+	task_g->cl = &cl_g;
+	task_g->buffers[0].handle = B_handle;
+	task_g->buffers[0].mode = STARPU_R;
+	task_g->buffers[1].handle = C_handle;
+	task_g->buffers[1].mode = STARPU_RW;
+	starpu_submit_task(task_g);
+
+	struct starpu_task *task_h = starpu_task_create();
+	task_h->cl = &cl_h;
+	task_h->buffers[0].handle = C_handle;
+	task_h->buffers[0].mode = STARPU_R;
+	task_h->buffers[1].handle = D_handle;
+	task_h->buffers[1].mode = STARPU_RW;
+	starpu_submit_task(task_h);
+
+	starpu_wait_all_tasks();
+
+	starpu_shutdown();
+
+	return 0;
+}