// Author: Guilhem Lavaux, Vadim Zeitlin, Vaclav Slavik
// Modified by:
// Created: 20/07/98
-// RCS-ID: $Id$
// Copyright: (c) 1998 Guilhem Lavaux
// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#include "wx/string.h"
#include "wx/dynarray.h"
-#if defined(__OS2__) || defined(__EMX__)
-#include "wx/os2/private.h"
-#endif
-
-#ifdef __WXMSW__
-#include "wx/msw/private.h"
-#endif
-
-#if defined(HAVE_DLERROR) && !defined(__EMX__)
+// note that we have our own dlerror() implementation under Darwin
+#if (defined(HAVE_DLERROR) && !defined(__EMX__)) || defined(__DARWIN__)
#define wxHAVE_DYNLIB_ERROR
#endif
-class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator;
+class WXDLLIMPEXP_FWD_BASE wxDynamicLibraryDetailsCreator;
// ----------------------------------------------------------------------------
// conditional compilation
// Note: __OS2__/EMX has to be tested first, since we want to use
// native version, even if configure detected presence of DLOPEN.
#if defined(__OS2__) || defined(__EMX__) || defined(__WINDOWS__)
- typedef HMODULE wxDllType;
+ typedef WXHMODULE wxDllType;
+#elif defined(__DARWIN__)
+ // Don't include dlfcn.h on Darwin, we may be using our own replacements.
+ typedef void *wxDllType;
#elif defined(HAVE_DLOPEN)
#include <dlfcn.h>
typedef void *wxDllType;
#elif defined(HAVE_SHL_LOAD)
#include <dl.h>
typedef shl_t wxDllType;
-#elif defined(__DARWIN__)
- typedef void *wxDllType;
#elif defined(__WXMAC__)
#include <CodeFragments.h>
typedef CFragConnectionID wxDllType;
wxDL_VERBATIM = 0x00000008, // attempt to load the supplied library
// name without appending the usual dll
// filename extension.
+
+ // this flag is obsolete, don't use
wxDL_NOSHARE = 0x00000010, // load new DLL, don't reuse already loaded
// (only for wxPluginManager)
+ wxDL_QUIET = 0x00000020, // don't log an error if failed to load
+
+ // this flag is dangerous, for internal use of wxMSW only, don't use at all
+ // and especially don't use directly, use wxLoadedDLL instead if you really
+ // do need it
+ wxDL_GET_LOADED = 0x00000040, // Win32 only: return handle of already
+ // loaded DLL or NULL otherwise; Unload()
+ // should not be called so don't forget to
+ // Detach() if you use this function
+
wxDL_DEFAULT = wxDL_NOW // default flags correspond to Win32
};
// type only once, as the first parameter, and creating a variable of this type
// called "pfn<name>" initialized with the "name" from the "dynlib"
#define wxDYNLIB_FUNCTION(type, name, dynlib) \
- type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
+ type pfn ## name = (type)(dynlib).GetSymbol(wxT(#name))
+
+
+// a more convenient function replacing wxDYNLIB_FUNCTION above
+//
+// it uses the convention that the type of the function is its name suffixed
+// with "_t" but it doesn't define a variable but just assigns the loaded value
+// to it and also allows to pass it the prefix to be used instead of hardcoding
+// "pfn" (the prefix can be "m_" or "gs_pfn" or whatever)
+//
+// notice that this function doesn't generate error messages if the symbol
+// couldn't be loaded, the caller should generate the appropriate message
+#define wxDL_INIT_FUNC(pfx, name, dynlib) \
+ pfx ## name = (name ## _t)(dynlib).RawGetSymbol(#name)
+
+#ifdef __WINDOWS__
+
+// same as wxDL_INIT_FUNC() but appends 'A' or 'W' to the function name, see
+// wxDynamicLibrary::GetSymbolAorW()
+#define wxDL_INIT_FUNC_AW(pfx, name, dynlib) \
+ pfx ## name = (name ## _t)(dynlib).GetSymbolAorW(#name)
+
+#endif // __WINDOWS__
+
+// the following macros can be used to redirect a whole library to a class and
+// check at run-time if the library is present and contains all required
+// methods
+//
+// notice that they are supposed to be used inside a class which has "m_ok"
+// member variable indicating if the library had been successfully loaded
+
+// helper macros constructing the name of the variable storing the function
+// pointer and the name of its type from the function name
+#define wxDL_METHOD_NAME(name) m_pfn ## name
+#define wxDL_METHOD_TYPE(name) name ## _t
+
+// parameters are:
+// - rettype: return type of the function, e.g. "int"
+// - name: name of the function, e.g. "foo"
+// - args: function signature in parentheses, e.g. "(int x, int y)"
+// - argnames: the names of the parameters in parentheses, e.g. "(x, y)"
+// - defret: the value to return if the library wasn't successfully loaded
+#define wxDL_METHOD_DEFINE( rettype, name, args, argnames, defret ) \
+ typedef rettype (* wxDL_METHOD_TYPE(name)) args ; \
+ wxDL_METHOD_TYPE(name) wxDL_METHOD_NAME(name); \
+ rettype name args \
+ { return m_ok ? wxDL_METHOD_NAME(name) argnames : defret; }
+
+#define wxDL_VOIDMETHOD_DEFINE( name, args, argnames ) \
+ typedef void (* wxDL_METHOD_TYPE(name)) args ; \
+ wxDL_METHOD_TYPE(name) wxDL_METHOD_NAME(name); \
+ void name args \
+ { if ( m_ok ) wxDL_METHOD_NAME(name) argnames ; }
+
+#define wxDL_METHOD_LOAD(lib, name) \
+ wxDL_METHOD_NAME(name) = \
+ (wxDL_METHOD_TYPE(name)) lib.GetSymbol(#name, &m_ok); \
+ if ( !m_ok ) return false
// ----------------------------------------------------------------------------
// wxDynamicLibraryDetails: contains details about a loaded wxDynamicLibrary
static wxDllType GetProgramHandle();
// return the platform standard DLL extension (with leading dot)
- static const wxChar *GetDllExt() { return ms_dllext; }
+ static wxString GetDllExt(wxDynamicLibraryCategory cat = wxDL_LIBRARY);
wxDynamicLibrary() : m_handle(0) { }
wxDynamicLibrary(const wxString& libname, int flags = wxDL_DEFAULT)
#endif
}
-#ifdef __WXMSW__
+#ifdef __WINDOWS__
// this function is useful for loading functions from the standard Windows
// DLLs: such functions have an 'A' (in ANSI build) or 'W' (in Unicode, or
// wide character build) suffix if they take string parameters
{
return RawGetSymbolAorW(m_handle, name);
}
-#endif // __WXMSW__
+#endif // __WINDOWS__
// return all modules/shared libraries in the address space of this process
//
static wxString GetPluginsDirectory();
+#ifdef __WINDOWS__
+ // return the handle (HMODULE/HINSTANCE) of the DLL with the given name
+ // and/or containing the specified address: for XP and later systems only
+ // the address is used and the name is ignored but for the previous systems
+ // only the name (which may be either a full path to the DLL or just its
+ // base name, possibly even without extension) is used
+ //
+ // the returned handle reference count is not incremented so it doesn't
+ // need to be freed using FreeLibrary() but it also means that it can
+ // become invalid if the DLL is unloaded
+ static WXHMODULE MSWGetModuleHandle(const wxString& name, void *addr);
+#endif // __WINDOWS__
+
protected:
// common part of GetSymbol() and HasSymbol()
void *DoGetSymbol(const wxString& name, bool *success = 0) const;
#endif // wxHAVE_DYNLIB_ERROR
- // platform specific shared lib suffix.
- static const wxChar *ms_dllext;
-
// the handle to DLL or NULL
wxDllType m_handle;
// no copy ctor/assignment operators (or we'd try to unload the library
// twice)
- DECLARE_NO_COPY_CLASS(wxDynamicLibrary)
+ wxDECLARE_NO_COPY_CLASS(wxDynamicLibrary);
+};
+
+#ifdef __WINDOWS__
+
+// ----------------------------------------------------------------------------
+// wxLoadedDLL is a MSW-only internal helper class allowing to dynamically bind
+// to a DLL already loaded into the project address space
+// ----------------------------------------------------------------------------
+
+class wxLoadedDLL : public wxDynamicLibrary
+{
+public:
+ wxLoadedDLL(const wxString& dllname)
+ : wxDynamicLibrary(dllname, wxDL_GET_LOADED | wxDL_VERBATIM | wxDL_QUIET)
+ {
+ }
+
+ ~wxLoadedDLL()
+ {
+ Detach();
+ }
};
+#endif // __WINDOWS__
// ----------------------------------------------------------------------------
// Interesting defines
projects / wxWidgets.git / blobdiff