claw  1.9.0
dynamic_library_traits_win32.hpp
Go to the documentation of this file.
1 /*
2  CLAW - a C++ Library Absolutely Wonderful
3 
4  CLAW is a free library without any particular aim but being useful to
5  anyone.
6 
7  Copyright (C) 2005-2011 Julien Jorge
8 
9  This library is free software; you can redistribute it and/or
10  modify it under the terms of the GNU Lesser General Public
11  License as published by the Free Software Foundation; either
12  version 2.1 of the License, or (at your option) any later version.
13 
14  This library is distributed in the hope that it will be useful,
15  but WITHOUT ANY WARRANTY; without even the implied warranty of
16  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
17  Lesser General Public License for more details.
18 
19  You should have received a copy of the GNU Lesser General Public
20  License along with this library; if not, write to the Free Software
21  Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 
23  contact: julien.jorge@stuff-o-matic.com
24 */
30 #ifndef __CLAW_DYNAMIC_LIBRARY_TRAITS_WIN32_HPP__
31 #define __CLAW_DYNAMIC_LIBRARY_TRAITS_WIN32_HPP__
32 
33 #include <string>
34 //#include <cstdarg>
35 //#include <windef.h>
36 //#include <winbase.h>
37 #include <windows.h>
38 
39 namespace claw
40 {
46  {
47  public:
49  typedef HMODULE handle;
50 
51  public:
57  static handle open(const std::string& name)
58  {
59  return LoadLibrary(name.c_str());
60  }
61 
67  static handle auto_open(const std::string& name)
68  {
69  return LoadLibrary(name.c_str());
70  }
71 
76  static void close(handle h)
77  {
78  FreeLibrary(h);
79  }
80 
86  template <class T>
87  static T get_symbol(handle h, const std::string& name)
88  {
89  /* HACK : ISO standard doesn't allow to cast from a pointer to an object
90  to a pointer to a function. */
91  T result;
92  *(FARPROC*)(&result) = GetProcAddress(h, name.c_str());
93 
94  return result;
95  }
96 
102  static bool have_symbol(handle h, const std::string& name)
103  {
104  return GetProcAddress(h, name.c_str()) != NULL;
105  }
106 
111  static bool valid_handle(handle h)
112  {
113  return h != NULL;
114  }
115 
116  }; // class dynamic_library_traits_win32
117 
118  typedef dynamic_library_traits_win32 dynamic_library_traits;
119 }
120 
121 #endif // __CLAW_DYNAMIC_LIBRARY_TRAITS_WIN32_HPP__
dynamic_library_traits_unix dynamic_library_traits
The traits to access the dynamic libraries in Unix system.
static void close(handle h)
Close a library.
static handle open(const std::string &name)
Open a library.
static bool have_symbol(handle h, const std::string &name)
Tell if a symbol is in the library.
static bool valid_handle(handle h)
Tell if an handle is a valid library handle.
static handle auto_open(const std::string &name)
Open the current program.
Microsoft Windows interface for using dynamic libraries.
This is the main namespace.
Definition: application.hpp:49
static T get_symbol(handle h, const std::string &name)
Get a symbol from a library.
HMODULE handle
Type of the system handle to the library.