Move files to prepare for assimilation into core

[libs/core.git] / source / io / poll.h

diff --git a/source/io/poll.h b/source/io/poll.h
new file mode 100644 (file)
index 0000000..6367d8f
--- /dev/null
+++ b/source/io/poll.h
@@ -0,0 +1,82 @@
+#ifndef MSP_IO_POLL_H_
+#define MSP_IO_POLL_H_
+
+#ifndef WIN32
+#include <poll.h>
+#endif
+#include <list>
+#include <map>
+#include <vector>
+#include <msp/time/timedelta.h>
+#include "types.h"
+
+namespace Msp {
+namespace IO {
+
+class Base;
+
+enum PollEvent
+{
+       P_NONE = 0,
+       P_INPUT = 1,
+       P_PRIO = 2,
+       P_OUTPUT = 4,
+       P_ERROR = 8
+};
+
+inline PollEvent operator|(PollEvent e, PollEvent f)
+{ return PollEvent(static_cast<int>(e)|static_cast<int>(f)); }
+
+inline PollEvent operator&(PollEvent e, PollEvent f)
+{ return PollEvent(static_cast<int>(e)&static_cast<int>(f)); }
+
+inline PollEvent operator~(PollEvent e)
+{ return PollEvent(~static_cast<int>(e)); }
+
+
+class Poller
+{
+public:
+       struct Slot
+       {
+               Base *object;
+               PollEvent events;
+
+               Slot(Base *o, PollEvent e): object(o), events(e) { }
+       };
+
+       typedef std::list<Slot> SlotSeq;
+private:
+       typedef std::map<Base *, Slot> SlotMap;
+
+#ifdef WIN32
+       struct pollfd
+       {
+               Handle fd;
+       };
+#endif
+
+       SlotMap objects;
+       std::vector<pollfd> pfd;
+       bool pfd_dirty;
+       SlotSeq poll_result;
+
+       void rebuild_pfd();
+       int do_poll(int);
+
+public:
+       Poller();
+
+       void set_object(Base &, PollEvent);
+       int poll();
+       int poll(const Time::TimeDelta &);
+       const SlotSeq &get_result() const { return poll_result; }
+};
+
+PollEvent poll(Base &, PollEvent);
+PollEvent poll(Base &, PollEvent, const Time::TimeDelta &);
+
+} // namespace IO
+} // namespace Msp
+
+#endif