net: encapsulate fdwatch backend metadata

src/libthecore/fdwatch.h

@@ -1,85 +1,35 @@
 #pragma once
 
-#ifndef __USE_SELECT__
+typedef struct fdwatch		FDWATCH;
+typedef struct fdwatch *	LPFDWATCH;
 
-    typedef struct fdwatch		FDWATCH;
-    typedef struct fdwatch *	LPFDWATCH;
+enum EFdwatch
+{
+	FDW_NONE			= 0,
+	FDW_READ			= 1,
+	FDW_WRITE			= 2,
+	FDW_WRITE_ONESHOT	= 4,
+	FDW_EOF				= 8,
+};
 
-    enum EFdwatch
-    {
-		FDW_NONE			= 0,
-		FDW_READ			= 1,
-		FDW_WRITE			= 2,
-		FDW_WRITE_ONESHOT	= 4,
-		FDW_EOF				= 8,
-    };
-
-    typedef struct kevent	KEVENT;
-    typedef struct kevent *	LPKEVENT;
-    typedef int				KQUEUE;
-
-    struct fdwatch
-    {
-		KQUEUE		kq;
-
-		int		nfiles;
-
-		LPKEVENT	kqevents;
-		int		nkqevents;
-
-		LPKEVENT	kqrevents;
-		int *		fd_event_idx;
-
-		void **		fd_data;
-		int *		fd_rw;
-    };
-
-#else
-
-    typedef struct fdwatch		FDWATCH;
-    typedef struct fdwatch *	LPFDWATCH;
-
-    enum EFdwatch
-    {
-		FDW_NONE			= 0,
-		FDW_READ			= 1,
-		FDW_WRITE			= 2,
-		FDW_WRITE_ONESHOT	= 4,
-		FDW_EOF				= 8,
-    };
-
-    struct fdwatch
-    {
-		fd_set rfd_set;
-		fd_set wfd_set;
-
-		socket_t* select_fds;
-		int* select_rfdidx;
-
-		int nselect_fds;
-
-		fd_set working_rfd_set;
-		fd_set working_wfd_set;
-
-		int nfiles;
-
-		void** fd_data;
-		int* fd_rw;
-    };
-
-#endif // WIN32
-
-
-LPFDWATCH	fdwatch_new(int nfiles);
-void		fdwatch_clear_fd(LPFDWATCH fdw, socket_t fd);
-void		fdwatch_delete(LPFDWATCH fdw);
-int			fdwatch_check_fd(LPFDWATCH fdw, socket_t fd);
-int			fdwatch_check_event(LPFDWATCH fdw, socket_t fd, unsigned int event_idx);
-void		fdwatch_clear_event(LPFDWATCH fdw, socket_t fd, unsigned int event_idx);
-void		fdwatch_add_fd(LPFDWATCH fdw, socket_t fd, void* client_data, int rw, int oneshot);
-int			fdwatch(LPFDWATCH fdw, struct timeval *timeout);
-void *		fdwatch_get_client_data(LPFDWATCH fdw, unsigned int event_idx);
-void		fdwatch_del_fd(LPFDWATCH fdw, socket_t fd);
-int			fdwatch_get_buffer_size(LPFDWATCH fdw, socket_t fd);
-int			fdwatch_get_ident(LPFDWATCH fdw, unsigned int event_idx);
+enum EFdwatchBackend
+{
+	FDWATCH_BACKEND_KQUEUE = 0,
+	FDWATCH_BACKEND_SELECT = 1,
+};
 
+LPFDWATCH		fdwatch_new(int nfiles);
+void			fdwatch_clear_fd(LPFDWATCH fdw, socket_t fd);
+void			fdwatch_delete(LPFDWATCH fdw);
+int				fdwatch_check_fd(LPFDWATCH fdw, socket_t fd);
+int				fdwatch_check_event(LPFDWATCH fdw, socket_t fd, unsigned int event_idx);
+void			fdwatch_clear_event(LPFDWATCH fdw, socket_t fd, unsigned int event_idx);
+void			fdwatch_add_fd(LPFDWATCH fdw, socket_t fd, void* client_data, int rw, int oneshot);
+int				fdwatch(LPFDWATCH fdw, struct timeval *timeout);
+void *			fdwatch_get_client_data(LPFDWATCH fdw, unsigned int event_idx);
+void			fdwatch_del_fd(LPFDWATCH fdw, socket_t fd);
+int				fdwatch_get_buffer_size(LPFDWATCH fdw, socket_t fd);
+int				fdwatch_get_ident(LPFDWATCH fdw, unsigned int event_idx);
+EFdwatchBackend	fdwatch_get_backend(LPFDWATCH fdw);
+const char *	fdwatch_backend_name(EFdwatchBackend backend);
+int				fdwatch_get_descriptor_limit(LPFDWATCH fdw);