fifo_buffer: add extern "C"

src/ClientNew.cxx

@@ -22,8 +22,8 @@
 #include "ClientList.hxx"
 #include "Partition.hxx"
 #include "fd_util.h"
-extern "C" {
 #include "fifo_buffer.h"
+extern "C" {
 #include "resolver.h"
 }
 #include "Permission.hxx"

src/ClientRead.cxx

@@ -19,10 +19,7 @@
 
 #include "config.h"
 #include "ClientInternal.hxx"
-
-extern "C" {
 #include "fifo_buffer.h"
-}
 
 #include <assert.h>
 #include <string.h>

src/InotifySource.cxx

@@ -19,11 +19,7 @@
 
 #include "config.h"
 #include "InotifySource.hxx"
-
-extern "C" {
 #include "fifo_buffer.h"
-}
-
 #include "fd_util.h"
 #include "mpd_error.h"
 

src/fifo_buffer.h

@@ -46,6 +46,10 @@
 
 struct fifo_buffer;
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
 /**
  * Creates a new #fifo_buffer object.  Free this object with
  * fifo_buffer_free().
@@ -150,4 +154,8 @@ fifo_buffer_is_empty(struct fifo_buffer *buffer);
 bool
 fifo_buffer_is_full(struct fifo_buffer *buffer);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif