Initial import of Flemming Madsen's LibUEvent

This fork is called libuev and will focus solely on embedded Linux
systems using C.  Patches for other UNIX-like operating systems are
welcome.

- Remove Lua support, will not be used.
- Rename from LibUEvent to libuev where applicable
- Add project's MIT license to top of all files, as is customary
- Add a LICENSE file, as is customary

This MIT licensed code was cloned from the Mercurial repository at
Google http://code.google.com/p/libuevent/ which had mislabled the
license as "New BSD License", which is wrong.  The actual license
of the project is https://en.wikipedia.org/wiki/MIT_License

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

libuev.h

@@ -0,0 +1,68 @@
+/* libuev - Asynchronous event loop library
+ *
+ * Copyright (c) 2012  Flemming Madsen <flemming!madsen()madsensoft!dk>
+ * Copyright (c) 2013  Joachim Nilsson <troglobit()gmail!com>
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining
+ * a copy of this software and associated documentation files (the
+ * "Software"), to deal in the Software without restriction, including
+ * without limitation the rights to use, copy, modify, merge, publish,
+ * distribute, sublicense, and/or sell copies of the Software, and to
+ * permit persons to whom the Software is furnished to do so, subject to
+ * the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be
+ * included in all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
+ * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ * IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ * CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ * TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ * SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ */
+
+#ifndef LIBUEV_H
+#define LIBUEV_H
+
+struct LUETimerH;
+struct LUEFileEventH;
+struct LUECtxt;
+
+/**
+ * Typedef file handler callbacks
+ */
+typedef int (*LUEFileHandler)(struct LUECtxt *ctxt,
+                              struct LUEFileEventH *handle,
+                              int fd,
+                              void *data);
+/**
+ * Typedef timer handler callbacks
+ */
+typedef int (*LUETimerHandler)(struct LUECtxt *ctxt,
+                              struct LUETimerH *handle,
+                              void *data);
+
+struct LUEFileEventH *lueAddInput(struct LUECtxt *ctxt,
+                                  int fd, LUEFileHandler handler, void *data);
+int lueRemInput(struct LUECtxt *ctxt, struct LUEFileEventH *hdl);
+struct LUEFileEventH *lueAddOutput(struct LUECtxt *ctxt,
+                                  int fd, LUEFileHandler handler, void *data);
+int lueRemOutput(struct LUECtxt *ctxt, struct LUEFileEventH *hdl);
+int lueRemFd(struct LUECtxt *ctxt, int fd);
+
+struct LUETimerH *lueAddTimer(struct LUECtxt *ctxt, int periodMs,
+                              LUETimerHandler handler, void *data);
+int lueRemTimer(struct LUECtxt *ctxt, struct LUETimerH *hdl);
+
+struct LUECtxt *lueCtxtCreate();
+void lueCtxtDestroy(struct LUECtxt *lue);
+void lueTimeAdvance(struct LUECtxt *ctxt, int mSecs);
+void lueRun(struct LUECtxt *ctxt);
+int lueProcessPending(struct LUECtxt *ctxt);
+void lueTerminate(struct LUECtxt *ctxt);
+
+#endif /* LIBUEV_H */
+
+// vim: set ts=8 sw=3 sts=3 et: