Engine directory for ticket #1

Engine/source/platform/platformNetAsync.h

@@ -0,0 +1,63 @@
+//-----------------------------------------------------------------------------
+// Copyright (c) 2012 GarageGames, LLC
+//
+// 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 PLATFORM_NET_ASYNC_H
+#define PLATFORM_NET_ASYNC_H
+
+#include "platform/platform.h"
+#include "platform/platformNet.h"
+#include "core/util/tVector.h"
+
+// class for doing asynchronous network operations on unix (linux and 
+// hopefully osx) platforms.  right now it only implements dns lookups
+class NetAsync
+{
+   private:
+      struct NameLookupRequest;
+      struct NameLookupWorkItem;
+
+      typedef Vector< NameLookupRequest > RequestVector;
+      typedef RequestVector::iterator RequestIterator;
+
+      RequestVector mLookupRequests;
+
+   public:
+      NetAsync();
+
+      // queue a DNS lookup.  only one dns lookup can be queued per socket at
+      // a time.  subsequent queue request for the socket are ignored.  use
+      // checkLookup() to check the status of a request.
+      void queueLookup(const char* remoteAddr, NetSocket socket);
+
+      // check on the status of a dns lookup for a socket.  if the lookup is 
+      // not yet complete, the function will return false.  if it is 
+      // complete, the function will return true, and out_h_addr and 
+      // out_h_length will be set appropriately.  if out_h_length is -1, then
+      // name could not be resolved.  otherwise, it provides the number of
+      // address bytes copied into out_h_addr.
+      bool checkLookup(NetSocket socket, char* out_h_addr, int* out_h_length, int out_h_addr_size);
+};
+
+// the global net async object
+extern NetAsync gNetAsync;
+
+#endif