disable asynchronous copy: distinguish what is an action and what is an enquiry

doc/chapters/basic-api.texi

@@ -115,10 +115,10 @@ not support concurrent calls to parallel code. In such case, setting this flag
 makes StarPU only start one parallel task at a time.
 This can also be specified with the @code{STARPU_SINGLE_COMBINED_WORKER} environment variable.
 
-@item @code{int asynchronous_copy_disabled} (default = 0)
+@item @code{int disable_asynchronous_copy} (default = 0)
 This flag should be set to 1 to disable asynchronous copies between
 CPUs and accelerators. This can also be specified with the
-@code{STARPU_ASYNCHRONOUS_COPY_DISABLED} environment variable.
+@code{DISABLE_STARPU_ASYNCHRONOUS_COPY} environment variable.
 The AMD implementation of OpenCL is known to
 fail when copying data asynchronously. When using this implementation,
 it is therefore necessary to disable asynchronous data transfers.

include/starpu.h

@@ -82,7 +82,7 @@ struct starpu_conf
 	int single_combined_worker;
 
         /* indicate if the asynchronous copies should be disabled */
-	int asynchronous_copy_disabled;
+	int disable_asynchronous_copy;
 };
 
 /* Initialize a starpu_conf structure with default values. */

src/core/workers.c

@@ -368,7 +368,7 @@ int starpu_conf_init(struct starpu_conf *conf)
 
 	conf->single_combined_worker = starpu_get_env_number("STARPU_SINGLE_COMBINED_WORKER");
 
-	conf->asynchronous_copy_disabled = starpu_get_env_number("STARPU_ASYNCHRONOUS_COPY_DISABLED");
+	conf->disable_asynchronous_copy = starpu_get_env_number("STARPU_DISABLE_ASYNCHRONOUS_COPY");
 
 	return 0;
 }
@@ -448,16 +448,16 @@ int starpu_init(struct starpu_conf *user_conf)
 
 	if (user_conf)
 	{
-	     int asynchronous_copy_disabled = starpu_get_env_number("STARPU_ASYNCHRONOUS_COPY_DISABLED");
+	     int asynchronous_copy_disabled = starpu_get_env_number("DISABLE_STARPU_ASYNCHRONOUS_COPY");
 	     if (asynchronous_copy_disabled == 1)
-		  config.asynchronous_copy_disabled = 1;
+		  config.disable_asynchronous_copy = 1;
 	     else
-		  config.asynchronous_copy_disabled = (user_conf->asynchronous_copy_disabled == 1);
+		  config.disable_asynchronous_copy = (user_conf->disable_asynchronous_copy == 1);
 	}
 	else
 	{
-	     int asynchronous_copy_disabled = starpu_get_env_number("STARPU_ASYNCHRONOUS_COPY_DISABLED");
+	     int asynchronous_copy_disabled = starpu_get_env_number("STARPU_DISABLE_ASYNCHRONOUS_COPY");
-	     config.asynchronous_copy_disabled = (asynchronous_copy_disabled == 1);
+	     config.disable_asynchronous_copy = (asynchronous_copy_disabled == 1);
 	}
 
 	ret = _starpu_build_topology(&config);
@@ -707,7 +707,7 @@ unsigned starpu_spu_worker_get_count(void)
 
 int starpu_asynchronous_copy_disabled()
 {
-	return config.asynchronous_copy_disabled;
+	return config.disable_asynchronous_copy;
 }
 
 /* When analyzing performance, it is useful to see what is the processing unit

src/core/workers.h

@@ -159,7 +159,7 @@ struct _starpu_machine_config
 	unsigned running;
 
         /* indicate if the asynchronous copies should be disabled */
-        int asynchronous_copy_disabled;
+        int disable_asynchronous_copy;
 };
 
 /* Has starpu_shutdown already been called ? */