openflow build environment setup

2025-11-11 16:45:43 +08:00
parent be0a7ad9b3
commit 50ecb9a23f
2767 changed files with 62766 additions and 649828 deletions
--- a/openflow/include/click/selectset.hh
+++ b/openflow/include/click/selectset.hh
@ -0,0 +1,137 @@
+// -*- related-file-name: "../../lib/selectset.cc" -*-
+#ifndef CLICK_SELECTSET_HH
+#define CLICK_SELECTSET_HH 1
+#if !CLICK_USERLEVEL
+# error "<click/selectset.hh> only meaningful at user level"
+#endif
+#include <click/vector.hh>
+#include <click/sync.hh>
+#include <unistd.h>
+#if !HAVE_ALLOW_SELECT && !HAVE_ALLOW_POLL && !HAVE_ALLOW_KQUEUE
+# define HAVE_ALLOW_SELECT 1
+#endif
+#if defined(__APPLE__) && HAVE_ALLOW_SELECT && HAVE_ALLOW_POLL
+// Apple's poll() is often broken
+# undef HAVE_ALLOW_POLL
+#endif
+#if HAVE_POLL_H && HAVE_ALLOW_POLL
+# include <poll.h>
+#else
+# undef HAVE_ALLOW_POLL
+# if !HAVE_ALLOW_SELECT && !HAVE_ALLOW_KQUEUE
+#  error "poll is not supported on this system, try --enable-select"
+# endif
+#endif
+#if !HAVE_SYS_EVENT_H || !HAVE_KQUEUE
+# undef HAVE_ALLOW_KQUEUE
+# if !HAVE_ALLOW_SELECT && !HAVE_ALLOW_POLL
+#  error "kqueue is not supported on this system, try --enable-select"
+# endif
+#endif
+CLICK_DECLS
+class Element;
+class Router;
+class RouterThread;
+
+class SelectSet { public:
+
+    SelectSet();
+    ~SelectSet();
+
+    void initialize();
+
+    int add_select(int fd, Element *element, int mask);
+    int remove_select(int fd, Element *element, int mask);
+
+    void run_selects(RouterThread *thread);
+    inline void wake_immediate() {
+	_wake_pipe_pending = true;
+	ignore_result(write(_wake_pipe[1], "", 1));
+    }
+
+    void kill_router(Router *router);
+
+    inline void fence();
+
+  private:
+
+    struct SelectorInfo {
+	Element *read;
+	Element *write;
+	int pollfd;
+	SelectorInfo()
+	    : read(0), write(0), pollfd(-1)
+	{
+	}
+    };
+
+    int _wake_pipe[2];
+    volatile bool _wake_pipe_pending;
+#if HAVE_ALLOW_KQUEUE
+    int _kqueue;
+#endif
+#if !HAVE_ALLOW_POLL
+    struct pollfd {
+	int fd;
+	int events;
+    };
+    fd_set _read_select_fd_set;
+    fd_set _write_select_fd_set;
+    int _max_select_fd;
+#endif /* !HAVE_ALLOW_POLL */
+    Vector<struct pollfd> _pollfds;
+    Vector<SelectorInfo> _selinfo;
+#if HAVE_MULTITHREAD
+    SimpleSpinlock _select_lock;
+    click_processor_t _select_processor;
+#endif
+
+    void register_select(int fd, bool add_read, bool add_write);
+    void remove_pollfd(int pi, int event);
+    inline void call_selected(int fd, int mask) const;
+    inline bool post_select(RouterThread *thread, bool acquire);
+#if HAVE_ALLOW_KQUEUE
+    void run_selects_kqueue(RouterThread *thread);
+#endif
+#if HAVE_ALLOW_POLL
+    void run_selects_poll(RouterThread *thread);
+#else
+    void run_selects_select(RouterThread *thread);
+#endif
+
+    inline void lock();
+    inline void unlock();
+
+#if CLICK_DEBUG_MASTER || CLICK_DEBUG_SCHEDULING
+    friend class Master;
+#endif
+
+};
+
+inline void
+SelectSet::lock()
+{
+#if HAVE_MULTITHREAD
+    if (click_get_processor() != _select_processor)
+	_select_lock.acquire();
+#endif
+}
+
+inline void
+SelectSet::unlock()
+{
+#if HAVE_MULTITHREAD
+    if (click_get_processor() != _select_processor)
+	_select_lock.release();
+#endif
+}
+
+inline void
+SelectSet::fence()
+{
+    lock();
+    unlock();
+}
+
+CLICK_ENDDECLS
+#endif