Wrap various bluetooth service API with extern "C"

Make service API usable in C++ code without the need of explicit
include statements wrapping.

nimble/host/services/ans/include/services/ans/ble_svc_ans.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_ANS_
 #define H_BLE_SVC_ANS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 /* 16 Bit Alert Notification Service UUID */
@@ -81,5 +85,8 @@ int ble_svc_ans_unr_alert_add(uint8_t cat_id);
 
 void ble_svc_ans_init(void);
 
+#ifdef __cplusplus
+}
 #endif
 
+#endif

nimble/host/services/bas/include/services/bas/ble_svc_bas.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_BAS_
 #define H_BLE_SVC_BAS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* 16 Bit Battery Service UUID */
 #define BLE_SVC_BAS_UUID16                                   0x180F
 
@@ -30,4 +34,8 @@ int ble_svc_bas_battery_level_set(uint8_t level);
 
 void ble_svc_bas_init(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/cte/include/services/cte/ble_svc_cte.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_CTE_
 #define H_BLE_SVC_CTE_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 #define BLE_SVC_CTE_UUID16                                      0x184A
@@ -33,5 +37,8 @@ struct ble_hs_cfg;
 
 void ble_svc_cte_init(void);
 
+#ifdef __cplusplus
+}
 #endif
 
+#endif

nimble/host/services/cts/include/services/cts/ble_svc_cts.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_CTS_
 #define H_BLE_SVC_CTS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define BLE_SVC_CTS_ERR_DATA_FIELD_IGNORED      0x80
 /* 16 Bit Current Time Service UUID */
 #define BLE_SVC_CTS_UUID16                      0x1805
@@ -157,4 +161,8 @@ ble_svc_cts_init(struct ble_svc_cts_cfg cfg);
 void
 ble_svc_cts_time_updated(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/dis/include/services/dis/ble_svc_dis.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_DIS_
 #define H_BLE_SVC_DIS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Example:
  *
@@ -145,4 +149,8 @@ int ble_svc_dis_system_id_set(const char *value);
 int ble_svc_dis_pnp_id_set(const char *value);
 const char *ble_svc_dis_pnp_id(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/hid/include/services/hid/ble_svc_hid.h

@@ -21,6 +21,10 @@
 #ifndef H_BLE_SVC_HID_
 #define H_BLE_SVC_HID_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /* 16 Bit Battery Service UUID */
 #define BLE_SVC_HID_UUID16                                   0x1812
 
@@ -110,5 +114,9 @@ void ble_svc_hid_init(void);
 int ble_svc_hid_add(struct ble_svc_hid_params params);
 void ble_svc_hid_reset(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif
 #endif // CONFIG_BT_NIMBLE_HID_SERVICE

nimble/host/services/hr/include/services/hr/ble_svc_hr.h

@@ -7,6 +7,10 @@
 #ifndef H_BLE_SVC_HR_
 #define H_BLE_SVC_HR_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 /* 16 Bit Heart Rate Service UUID */
@@ -26,4 +30,8 @@ void ble_svc_hr_on_gap_disconnect(uint16_t conn_handle);
 
 void ble_svc_hr_init(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/htp/include/services/htp/ble_svc_htp.h

@@ -7,6 +7,10 @@
 #ifndef H_BLE_SVC_HTP_
 #define H_BLE_SVC_HTP_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 /* 16 Bit Health Thermometer Service UUID */
@@ -47,4 +51,8 @@ int ble_svc_htp_notify(uint16_t conn_handle, float temp, bool temp_unit);
 
 void ble_svc_htp_init(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/ias/include/services/ias/ble_svc_ias.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_IAS_TPS_
 #define H_BLE_IAS_TPS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 #define BLE_SVC_IAS_UUID16                                      0x1802
 #define BLE_SVC_IAS_CHR_UUID16_ALERT_LEVEL                      0x2a06
 
@@ -33,6 +37,9 @@ typedef int ble_svc_ias_event_fn(uint8_t alert_level);
 void ble_svc_ias_set_cb(ble_svc_ias_event_fn *cb);
 void ble_svc_ias_init(void);
 
+#ifdef __cplusplus
+}
 #endif
 
+#endif
 

nimble/host/services/prox/include/services/prox/ble_svc_prox.h

@@ -7,6 +7,10 @@
 #ifndef H_BLE_SVC_PROX_
 #define H_BLE_SVC_PROX_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 /* 16 Bit Proximity Sensor Service UUID */
@@ -29,4 +33,8 @@ struct ble_hs_cfg;
  */
 void ble_svc_prox_init(void);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/sps/include/services/sps/ble_svc_sps.h

@@ -22,6 +22,9 @@
 #ifndef H_BLE_SVC_SPS_
 #define H_BLE_SVC_SPS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 #define BLE_SVC_SPS_UUID16                              0x1813
 #define BLE_SVC_SPS_CHR_UUID16_SCAN_ITVL_WINDOW	        0x2A4F
@@ -32,4 +35,9 @@ typedef int ble_svc_sps_event_fn(uint16_t scan_interval, uint16_t scan_window);
 void ble_svc_sps_scan_refresh(void);
 void ble_svc_sps_init(uint16_t scan_itvl, uint16_t scan_window);
 void ble_svc_sps_set_cb(ble_svc_sps_event_fn *cb);
+
+#ifdef __cplusplus
+}
+#endif
+
 #endif

nimble/host/services/tps/include/services/tps/ble_svc_tps.h

@@ -20,6 +20,10 @@
 #ifndef H_BLE_SVC_TPS_
 #define H_BLE_SVC_TPS_
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 struct ble_hs_cfg;
 
 #define BLE_SVC_TPS_UUID16                                      0x1804
@@ -27,5 +31,8 @@ struct ble_hs_cfg;
 
 void ble_svc_tps_init(void);
 
+#ifdef __cplusplus
+}
 #endif
 
+#endif