Bluetooth: samples: Add extern "C" { } block to GATT header files

Adds extern "C" { } blocks to header files so that they can be
safely used by C++ applications.

Change-Id: I767a04635b38d8ef7a02e8c7da3a5c99b0bc7709
Signed-off-by: Luiz Augusto von Dentz <luiz.von.dentz@intel.com>

7 files changed, 56 insertions, 0 deletions

diff --git a/samples/bluetooth/gatt/bas.h b/samples/bluetooth/gatt/bas.h
index eff7990ef..616356b4c 100644
--- a/samples/bluetooth/gatt/bas.h
+++ b/samples/bluetooth/gatt/bas.h
@@ -18,5 +18,13 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void bas_init(void);
 void bas_notify(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/cts.h b/samples/bluetooth/gatt/cts.h
index 47c42404f..9d0b21188 100644
--- a/samples/bluetooth/gatt/cts.h
+++ b/samples/bluetooth/gatt/cts.h
@@ -18,5 +18,13 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void cts_init(void);
 void cts_notify(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/dis.h b/samples/bluetooth/gatt/dis.h
index 66e4e948f..442ec2995 100644
--- a/samples/bluetooth/gatt/dis.h
+++ b/samples/bluetooth/gatt/dis.h
@@ -18,4 +18,12 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void dis_init(const char *model, const char *manuf);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/gap.h b/samples/bluetooth/gatt/gap.h
index f8e630557..6bcf123fc 100644
--- a/samples/bluetooth/gatt/gap.h
+++ b/samples/bluetooth/gatt/gap.h
@@ -18,4 +18,12 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void gap_init(const char *name, uint16_t appearance);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/hog.h b/samples/bluetooth/gatt/hog.h
index c8f346e1b..15459f688 100644
--- a/samples/bluetooth/gatt/hog.h
+++ b/samples/bluetooth/gatt/hog.h
@@ -18,4 +18,12 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void hog_init(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/hrs.h b/samples/bluetooth/gatt/hrs.h
index 2652a5da5..a39b8fe3b 100644
--- a/samples/bluetooth/gatt/hrs.h
+++ b/samples/bluetooth/gatt/hrs.h
@@ -18,5 +18,13 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void hrs_init(uint8_t blsc);
 void hrs_notify(void);
+
+#ifdef __cplusplus
+}
+#endif
diff --git a/samples/bluetooth/gatt/ipss.h b/samples/bluetooth/gatt/ipss.h
index 2a5bd0c82..01e344f72 100644
--- a/samples/bluetooth/gatt/ipss.h
+++ b/samples/bluetooth/gatt/ipss.h
@@ -18,5 +18,13 @@
  * limitations under the License.
  */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 void ipss_init(void);
 int ipss_advertise(void);
+
+#ifdef __cplusplus
+}
+#endif