include: Add C++ directives in headers

Fixes #34

9 files changed, 79 insertions, 2 deletions

diff --git a/include/ouroboros/CMakeLists.txt b/include/ouroboros/CMakeLists.txt
index 748d5e2d..b07568e3 100644
--- a/include/ouroboros/CMakeLists.txt
+++ b/include/ouroboros/CMakeLists.txt
@@ -5,6 +5,7 @@ configure_file(
 set(HEADER_FILES
   cacep.h
   cdap.h
+  cdefs.h
   dev.h
   errno.h
   fcntl.h
diff --git a/include/ouroboros/cacep.h b/include/ouroboros/cacep.h
index 950f3cf7..967151de 100644
--- a/include/ouroboros/cacep.h
+++ b/include/ouroboros/cacep.h
@@ -24,6 +24,8 @@
 #ifndef OUROBOROS_CACEP_H
 #define OUROBOROS_CACEP_H
 
+#include <ouroboros/cdefs.h>
+
 #include <stdint.h>
 
 enum proto_concrete_syntax {
@@ -40,10 +42,14 @@ struct conn_info {
         uint64_t                   addr;
 };
 
+__BEGIN_DECLS
+
 int cacep_snd(int                      fd,
               const struct conn_info * in);
 
 int cacep_rcv(int                fd,
               struct conn_info * out);
 
+__END_DECLS
+
 #endif /* OUROBOROS_CACEP_H */
diff --git a/include/ouroboros/cdap.h b/include/ouroboros/cdap.h
index 32edb51c..fe16a9c9 100644
--- a/include/ouroboros/cdap.h
+++ b/include/ouroboros/cdap.h
@@ -24,6 +24,8 @@
 #ifndef OUROBOROS_CDAP_H
 #define OUROBOROS_CDAP_H
 
+#include <ouroboros/cdefs.h>
+
 #include <stdbool.h>
 #include <stdint.h>
 #include <unistd.h>
@@ -46,6 +48,8 @@ struct cdap;
 
 typedef int32_t cdap_key_t;
 
+__BEGIN_DECLS
+
 struct cdap * cdap_create(void);
 
 int           cdap_destroy(struct cdap * instance);
@@ -81,4 +85,6 @@ int           cdap_reply_send(struct cdap * instance,
                               const void *  data,
                               size_t        len);
 
+__END_DECLS
+
 #endif /* OUROBOROS_CDAP_H */
diff --git a/include/ouroboros/cdefs.h b/include/ouroboros/cdefs.h
new file mode 100644
index 00000000..da7c4732
--- /dev/null
+++ b/include/ouroboros/cdefs.h
@@ -0,0 +1,35 @@
+/*
+ * Ouroboros - Copyright (C) 2016 - 2017
+ *
+ * C Definitions
+ *
+ *    Dimitri Staessens <dimitri.staessens@ugent.be>
+ *    Sander Vrijders   <sander.vrijders@ugent.be>
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public License
+ * version 2.1 as published by the Free Software Foundation.
+ *
+ * This library 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 for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ */
+
+#ifndef OUROBOROS_CDEFS_H
+#define OUROBOROS_CDEFS_H
+
+#ifdef __cplusplus
+# define __BEGIN_DECLS extern "C" {
+# define __END_DECLS   }
+#else
+# define __BEGIN_DECLS
+# define __END_DECLS
+#endif
+
+#endif /* OUROBOROS_CDEFS_H */
diff --git a/include/ouroboros/dev.h b/include/ouroboros/dev.h
index 396f2ae3..73d2d7b6 100644
--- a/include/ouroboros/dev.h
+++ b/include/ouroboros/dev.h
@@ -21,13 +21,16 @@
  * 02110-1301 USA
  */
 
+#ifndef OUROBOROS_DEV_H
+#define OUROBOROS_DEV_H
+
+#include <ouroboros/cdefs.h>
 #include <ouroboros/qos.h>
 
 #include <unistd.h>
 #include <time.h>
 
-#ifndef OUROBOROS_DEV_H
-#define OUROBOROS_DEV_H
+__BEGIN_DECLS
 
 /* These calls should be removed once we write the ouroboros OS. */
 int     ouroboros_init(const char * ap_name);
@@ -53,4 +56,6 @@ ssize_t flow_read(int    fd,
                   void * buf,
                   size_t count);
 
+__END_DECLS
+
 #endif /* OUROBOROS_DEV_H */
diff --git a/include/ouroboros/fcntl.h b/include/ouroboros/fcntl.h
index 65e8c378..489fff15 100644
--- a/include/ouroboros/fcntl.h
+++ b/include/ouroboros/fcntl.h
@@ -24,6 +24,8 @@
 #ifndef OUROBOROS_FCNTL_H
 #define OUROBOROS_FCNTL_H
 
+#include <ouroboros/cdefs.h>
+
 #include <sys/time.h>
 
 /* same values as fcntl.h */
@@ -37,6 +39,8 @@
 
 #define FLOW_O_INVALID  (FLOW_O_WRONLY | FLOW_O_RDWR)
 
+__BEGIN_DECLS
+
 int flow_set_flags(int fd,
                    int flags);
 
@@ -51,4 +55,6 @@ int flow_get_timeout(int               fd,
 int flow_get_qosspec(int         fd,
                      qosspec_t * qs);
 
+__END_DECLS
+
 #endif /* OUROBOROS_FCNTL_H */
diff --git a/include/ouroboros/fqueue.h b/include/ouroboros/fqueue.h
index fc7dc303..604fabf7 100644
--- a/include/ouroboros/fqueue.h
+++ b/include/ouroboros/fqueue.h
@@ -24,6 +24,8 @@
 #ifndef OUROBOROS_FQUEUE_H
 #define OUROBOROS_FQUEUE_H
 
+#include <ouroboros/cdefs.h>
+
 #include <stdbool.h>
 #include <time.h>
 
@@ -34,6 +36,8 @@ struct fqueue;
 typedef struct flow_set flow_set_t;
 typedef struct fqueue fqueue_t;
 
+__BEGIN_DECLS
+
 flow_set_t * flow_set_create(void);
 
 void         flow_set_destroy(flow_set_t * set);
@@ -59,4 +63,6 @@ int          flow_event_wait(flow_set_t *            set,
                              fqueue_t *              fq,
                              const struct timespec * timeout);
 
+__END_DECLS
+
 #endif /* OUROBOROS_FQUEUE_H */
diff --git a/include/ouroboros/irm.h b/include/ouroboros/irm.h
index d1aa5230..61b2fd87 100644
--- a/include/ouroboros/irm.h
+++ b/include/ouroboros/irm.h
@@ -24,6 +24,7 @@
 #ifndef OUROBOROS_IRM_H
 #define OUROBOROS_IRM_H
 
+#include <ouroboros/cdefs.h>
 #include <ouroboros/ipcp.h>
 
 #include <sys/types.h>
@@ -33,6 +34,8 @@
 #define BIND_AP_AUTO   0x01
 #define BIND_AP_UNIQUE 0x02
 
+__BEGIN_DECLS
+
 pid_t   irm_create_ipcp(const char *   name,
                         enum ipcp_type ipcp_type);
 
@@ -71,4 +74,6 @@ int     irm_unreg(const char * name,
                   char **      difs,
                   size_t       len);
 
+__END_DECLS
+
 #endif /* OUROBOROS_IRM_H */
diff --git a/include/ouroboros/nsm.h b/include/ouroboros/nsm.h
index 22a2a593..45adfed3 100644
--- a/include/ouroboros/nsm.h
+++ b/include/ouroboros/nsm.h
@@ -24,9 +24,13 @@
 #ifndef OUROBOROS_NSM_H
 #define OUROBOROS_NSM_H
 
+#include <ouroboros/cdefs.h>
+
 #include <stdint.h>
 #include <unistd.h>
 
+__BEGIN_DECLS
+
 int    nsm_reg(char *  name,
                char ** dafs,
                size_t  dafs_size);
@@ -41,4 +45,7 @@ int    nsm_unreg(char *  name,
  */
 ssize_t nsm_resolve(char *  name,
                     char ** dafs);
+
+__END_DECLS
+
 #endif