feat(API wrapper): separates implementation from public API

* moves implementation to impl subdirectory
* adds prefix _impl to implementation symbols
* removes double compilation for shared and static libraries
* fixes include guards
* fixes usage of extern "C"

include/wsfs/provider/operation/close.h

@@ -13,17 +13,17 @@
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 typedef void wsfsp_close_fn(
     ino_t inode,
     uint32_t handle,
     int flags,
     void * user_data);
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 #ifdef __cplusplus
 }
 #endif

include/wsfs/provider/operation/error.h

@@ -2,15 +2,15 @@
 #define WSFSP_OPERATION_ERROR_H
 
 #include "wsfs/provider/api.h"
-#include "wsfs/status.h"
-
-struct wsfsp_request;
+#include "wsfs/core/status.h"
 
 #ifdef __cplusplus
 extern "C"
 {
 #endif
 
+struct wsfsp_request;
+
 extern WSFSP_API void wsfsp_respond_error(
     struct wsfsp_request * request,
     wsfs_status status);

include/wsfs/provider/operation/getattr.h

@@ -7,6 +7,11 @@
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 struct wsfsp_request;
 
 typedef void wsfsp_getattr_fn(
@@ -14,12 +19,6 @@ typedef void wsfsp_getattr_fn(
     ino_t inode,
     void * user_data);
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
-
 extern WSFSP_API void wsfsp_respond_getattr(
     struct wsfsp_request * request,
     struct stat const * stat);

include/wsfs/provider/operation/lookup.h

@@ -7,6 +7,11 @@
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 struct wsfsp_request;
 
 typedef void wsfsp_lookup_fn(
@@ -15,11 +20,6 @@ typedef void wsfsp_lookup_fn(
     char const * name,
     void * user_data);
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 extern WSFSP_API void wsfsp_respond_lookup(
     struct wsfsp_request * request,
     struct stat const * stat);

include/wsfs/provider/operation/open.h

@@ -13,6 +13,11 @@
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 struct wsfsp_request;
 
 typedef void wsfsp_open_fn(
@@ -21,11 +26,6 @@ typedef void wsfsp_open_fn(
     int flags,
     void * user_data);
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 extern WSFSP_API void wsfsp_respond_open(
     struct wsfsp_request * request,
     uint32_t handle);

include/wsfs/provider/operation/read.h

@@ -16,6 +16,11 @@ using std::size_t;
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 struct wsfsp_request;
 
 typedef void wsfsp_read_fn(
@@ -26,11 +31,6 @@ typedef void wsfsp_read_fn(
     size_t length,
     void * user_data);
 
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 extern WSFSP_API void wsfsp_respond_read(
     struct wsfsp_request * request,
     char const * data,

include/wsfs/provider/operation/readdir.h

@@ -7,6 +7,11 @@
 
 #include "wsfs/provider/api.h"
 
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
 struct wsfsp_dirbuffer;
 struct wsfsp_request;
 
@@ -15,12 +20,6 @@ typedef void wsfsp_readdir_fn(
     ino_t directory,
     void * user_data);
 
-
-#ifdef __cplusplus
-extern "C"
-{
-#endif
-
 extern WSFSP_API void wsfsp_respond_readdir(
     struct wsfsp_request * request,
     struct wsfsp_dirbuffer * dirbuffer);