Split up ifdef'd module code

2016-04-09 21:49:12 -06:00
parent 2400c64c82
commit 641ac1a1ae
4 changed files with 242 additions and 205 deletions
--- a/include/chaiscript/language/chaiscript_posix.hpp
+++ b/include/chaiscript/language/chaiscript_posix.hpp
@@ -0,0 +1,79 @@
+// This file is distributed under the BSD License.
+// See "license.txt" for details.
+// Copyright 2009-2012, Jonathan Turner (jonathan@emptycrate.com)
+// Copyright 2009-2016, Jason Turner (jason@emptycrate.com)
+// http://www.chaiscript.com
+
+#ifndef CHAISCRIPT_POSIX_HPP_
+#define CHAISCRIPT_POSIX_HPP_
+
+namespace chaiscript
+{
+  namespace detail
+  {
+    struct Loadable_Module
+    {
+      struct DLModule
+      {
+        DLModule(const std::string &t_filename)
+          : m_data(dlopen(t_filename.c_str(), RTLD_NOW))
+        {
+          if (!m_data)
+          {
+            throw chaiscript::exception::load_module_error(dlerror());
+          }
+        }
+
+        DLModule(const DLModule &); // Explicitly unimplemented copy constructor
+        DLModule &operator=(const DLModule &); // Explicitly unimplemented assignment operator
+
+        ~DLModule()
+        {
+          dlclose(m_data);
+        }
+
+        void *m_data;
+      };
+
+      template<typename T>
+        struct DLSym
+        {
+          DLSym(DLModule &t_mod, const std::string &t_symbol)
+            : m_symbol(cast_symbol(dlsym(t_mod.m_data, t_symbol.c_str())))
+          {
+            if (!m_symbol)
+            {
+              throw chaiscript::exception::load_module_error(dlerror());
+            }
+          }
+
+          static T cast_symbol(void *p)
+          {
+            union cast_union
+            {
+              T func_ptr;
+              void *in_ptr;
+            };
+
+            cast_union c;
+            c.in_ptr = p;
+            return c.func_ptr;
+          }
+
+          T m_symbol;
+        };
+
+      Loadable_Module(const std::string &t_module_name, const std::string &t_filename)
+        : m_dlmodule(t_filename), m_func(m_dlmodule, "create_chaiscript_module_" + t_module_name),
+        m_moduleptr(m_func.m_symbol())
+      {
+      }
+
+      DLModule m_dlmodule;
+      DLSym<Create_Module_Func> m_func;
+      ModulePtr m_moduleptr;
+    };
+  }
+}
+#endif
+