[CLOUD-DEV,RFCv1] examples: register custom pktio_ops module

diff --git a/example/ddf_app/odp_ddf_app.c b/example/ddf_app/odp_ddf_app.c
index af864ee..619663e 100644
--- a/example/ddf_app/odp_ddf_app.c
+++ b/example/ddf_app/odp_ddf_app.c
@@ -20,9 +20,12 @@ 
 int main(int argc, char *argv[])
 {
 	odp_instance_t instance;
+	odp_pktio_t pktio = ODP_PKTIO_INVALID;
 
-	(void)argc;
-	(void)argv;
+	if (argc == 1 || argc > 2) {
+		printf("Error: invalid parameter.\nUsage:\n\t%s <interface>\n", argv[0]);
+		exit(0);
+	}
 
 	EXAMPLE_DBG("Start DDF Application...\n");
 
@@ -37,6 +40,15 @@  int main(int argc, char *argv[])
 		exit(EXIT_FAILURE);
 	}
 
+	/* Open pktio*/
+	pktio = odp_pktio_open(argv[1], ODP_POOL_INVALID, NULL);
+	if (pktio == ODP_PKTIO_INVALID)
+		EXAMPLE_ERR("Error: Failed to open pktio \"%s\".\n", argv[1]);
+
+	/* Close pktio*/
+	if (odp_pktio_close(pktio))
+		EXAMPLE_ERR("Error: Failed to close pktio \"%s\".\n", argv[1]);
+
 	/* Print ddf objects*/
 	odpdrv_print_all();
 
diff --git a/example/ddf_ifs/Makefile.am b/example/ddf_ifs/Makefile.am
index aa892ac..8bd666e 100644
--- a/example/ddf_ifs/Makefile.am
+++ b/example/ddf_ifs/Makefile.am
@@ -2,8 +2,10 @@  LIB   = $(top_builddir)/lib
 
 AM_CPPFLAGS +=  -I$(srcdir) \
 		-I$(top_srcdir)/include \
+		-I$(top_srcdir)/include/odp/arch/@ARCH_ABI@ \
 		-I$(top_srcdir)/platform/@with_platform@/include \
-		-I$(top_srcdir)/platform/@with_platform@/arch/@ARCH_DIR@
+		-I$(top_srcdir)/platform/@with_platform@/arch/@ARCH_DIR@ \
+		-I$(top_srcdir)/frameworks/modular
 
 lib_LTLIBRARIES = $(LIB)/libddf_ifs.la
 
diff --git a/example/ddf_ifs/ddf_ifs_driver.c b/example/ddf_ifs/ddf_ifs_driver.c
index 53f9475..0a4cc29 100644
--- a/example/ddf_ifs/ddf_ifs_driver.c
+++ b/example/ddf_ifs/ddf_ifs_driver.c
@@ -7,9 +7,19 @@ 
 #include <stdio.h>
 #include <string.h>
 #include "odp_drv.h"
+#include <odp_packet_io_internal.h>
 #include "ddf_ifs_api.h"
 #include "ddf_ifs_driver.h"
 
+#define DDF_IFS_NAME_SIZE 50
+#define DDF_IFS_DEV_PREFIX "ddf_ifs:"
+#define DDF_IFS_DEV_PREFIX_LEN 8
+/** Packet socket using netmap mmaped rings for both Rx and Tx */
+typedef struct {
+	char dev_name[DDF_IFS_NAME_SIZE];	/**< interface name */
+} pktio_ops_ddf_ifs_data_t;
+
+
 static odpdrv_driver_t ddf_ifs_driver;
 static int drv_data = 12;
 
@@ -46,8 +56,79 @@  static int ddf_ifs_driver_remove(void)
 	return 0;
 }
 
+static int ddf_ifs_init_global(void)
+{
+	printf("%s()\n", __func__);
+	return 0;
+}
+static int ddf_ifs_term_global(void)
+{
+	printf("%s()\n", __func__);
+	return 0;
+}
+
+static int ddf_ifs_open(odp_pktio_t pktio ODP_UNUSED, pktio_entry_t *pktio_entry,
+		    const char *devname, odp_pool_t pool)
+{
+	pktio_ops_ddf_ifs_data_t *pkt_ddf_ifs = _ops_data(pktio_entry, ddf_ifs);
+
+	(void)pktio;
+	(void)pool;
+
+	printf("%s(%s)\n", __func__, devname);
+	if (strncmp(devname, DDF_IFS_DEV_PREFIX, DDF_IFS_DEV_PREFIX_LEN) == 0)
+		devname += DDF_IFS_DEV_PREFIX_LEN;
+	else
+		return -1;
+
+	strcpy(pkt_ddf_ifs->dev_name, devname);
+	printf("%s() - device %s oppened!!!\n", __func__,
+	       pkt_ddf_ifs->dev_name);
+	return 0;
+}
+
+static int ddf_ifs_close(pktio_entry_t *pktio_entry)
+{
+	pktio_ops_ddf_ifs_data_t *pkt_ddf_ifs = _ops_data(pktio_entry, ddf_ifs);
+
+	printf("%s() - device %s closed.\n", __func__, pkt_ddf_ifs->dev_name);
+
+	return 0;
+}
+
+static pktio_ops_module_t ddf_ifs_pktio_ops = {
+	.base = {
+		.name = "ddf_ifs",
+		.init_local = NULL,
+		.term_local = NULL,
+		.init_global = ddf_ifs_init_global,
+		.term_global = ddf_ifs_term_global,
+	},
+	.open = ddf_ifs_open,
+	.close = ddf_ifs_close,
+	.start = NULL/*ddf_ifs_start*/,
+	.stop = NULL/*ddf_ifs_stop*/,
+	.stats = NULL/*ddf_ifs_stats*/,
+	.stats_reset = NULL/*ddf_ifs_stats_reset*/,
+	.pktin_ts_res = NULL,
+	.pktin_ts_from_ns = NULL,
+	.recv = NULL/*ddf_ifs_recv*/,
+	.send = NULL/*ddf_ifs_send*/,
+	.mtu_get = NULL/*ddf_ifs_mtu_get*/,
+	.promisc_mode_set = NULL/*ddf_ifs_promisc_mode_set*/,
+	.promisc_mode_get = NULL/*ddf_ifs_promisc_mode_get*/,
+	.mac_get = NULL/*ddf_ifs_mac_addr_get*/,
+	.link_status = NULL/*ddf_ifs_link_status*/,
+	.capability = NULL/*ddf_ifs_capability*/,
+	.config = NULL,
+	.input_queues_config = NULL/*ddf_ifs_input_queues_config*/,
+	.output_queues_config = NULL/*ddf_ifs_output_queues_config*/,
+	.print = NULL/*ddf_ifs_print*/,
+};
+
 int register_driver(void)
 {
+/* Register ddf driver*/
 	odpdrv_driver_param_t param = {
 		.name = DDF_IFS_DRV_NAME,
 		.devios = {{DDF_IFS_DEVIO_API_NAME, DDF_IFS_DEVIO_API_VER},
@@ -65,5 +146,12 @@  int register_driver(void)
 		return -1;
 	}
 
+/* Register pktio_ops module*/
+	odp_module_constructor(&ddf_ifs_pktio_ops);
+
+	odp_subsystem_register_module(pktio_ops, &ddf_ifs_pktio_ops);
+
+/* Explicit call to Init global*/
+	ddf_ifs_init_global();
 	return 0;
 }
diff --git a/frameworks/modular/odp_module.h b/frameworks/modular/odp_module.h
index 59f67c8..b20501e 100644
--- a/frameworks/modular/odp_module.h
+++ b/frameworks/modular/odp_module.h
@@ -38,6 +38,11 @@ 
 
 #ifndef ODP_MODULE_H_
 #define ODP_MODULE_H_
+#include <odp/visibility_begin.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #include <stdbool.h>
 #include <odp/api/rwlock.h>
@@ -293,4 +298,9 @@  int __subsystem_register_module(
 	__subsystem_set_active(&__subsystem(name), base);	\
 })
 
+#ifdef __cplusplus
+}
+#endif
+
+#include <odp/visibility_end.h>
 #endif
diff --git a/platform/linux-generic/include/odp_pktio_ops_subsystem.h b/platform/linux-generic/include/odp_pktio_ops_subsystem.h
index ff497a2..468c70d 100644
--- a/platform/linux-generic/include/odp_pktio_ops_subsystem.h
+++ b/platform/linux-generic/include/odp_pktio_ops_subsystem.h
@@ -8,6 +8,11 @@ 
 
 #ifndef ODP_PKTIO_OPS_SUBSYSTEM_H_
 #define ODP_PKTIO_OPS_SUBSYSTEM_H_
+#include <odp/visibility_begin.h>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #include <odp_module.h>
 #include <odp/api/packet_io.h>
@@ -78,4 +83,9 @@  typedef ODP_MODULE_CLASS(pktio_ops) {
 	odp_api_proto(pktio_ops, print) print;
 } pktio_ops_module_t;
 
+#ifdef __cplusplus
+}
+#endif
+
+#include <odp/visibility_end.h>
 #endif