Engine directory for ticket #1

Engine/source/platformWin32/winDlibrary.cpp

@@ -0,0 +1,92 @@
+//-----------------------------------------------------------------------------
+// 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.
+//-----------------------------------------------------------------------------
+
+#define NOMINMAX
+#define WIN32_LEAN_AND_MEAN
+#include <windows.h>
+
+#include "platform/types.h"
+#include "platform/platformDlibrary.h"
+
+class Win32DLibrary: public DLibrary
+{
+   HMODULE _handle;
+public:
+   Win32DLibrary();
+   ~Win32DLibrary();
+   bool open(const char* file);
+   void close();
+   void *bind(const char *name);
+};
+
+Win32DLibrary::Win32DLibrary()
+{
+   _handle = 0;
+}
+
+Win32DLibrary::~Win32DLibrary()
+{
+   close();
+}
+
+bool Win32DLibrary::open(const char* file)
+{
+   // dlopen should also include the RTLD_LOCAL flag, but it seems to be
+   // missing from cygwin
+   _handle = LoadLibraryA(file);
+   if (!_handle)
+      return false;
+   bool (*open)() = (bool(*)())bind("dllopen");
+   if (open && !(*open)()) {
+      FreeLibrary(_handle);
+      _handle = 0;
+      return false;
+   }
+   return true;
+}
+
+void Win32DLibrary::close()
+{
+   if (_handle) {
+      void (*close)() = (void(*)())bind("dllclose");
+      if (close)
+         (*close)();
+      FreeLibrary(_handle);
+      _handle = 0;
+   }
+}
+
+void* Win32DLibrary::bind(const char *name)
+{
+   return _handle? (void*)GetProcAddress(_handle,name): 0;
+}
+
+DLibraryRef OsLoadLibrary(const char* file)
+{
+   Win32DLibrary* library = new Win32DLibrary();
+   if (!library->open(file)) {
+      delete library;
+      return 0;
+   }
+   return library;
+}
+