// Created: 20/07/98
// RCS-ID: $Id$
// Copyright: (c) 1998 Guilhem Lavaux
-// Licence: wxWidgets licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DYNLIB_H__
#define _WX_DYNLIB_H__
-#if defined(__GNUG__) && !defined(NO_GCC_PRAGMA)
-# pragma interface "dynlib.h"
-#endif
-
-#include "wx/setup.h"
+#include "wx/defs.h"
#if wxUSE_DYNLIB_CLASS
#include "wx/string.h"
+#include "wx/dynarray.h"
-// FIXME: can this go in private.h or something too??
-#if defined(__WXPM__) || defined(__EMX__)
-#define INCL_DOS
-#include <os2.h>
+#if defined(__OS2__) || defined(__EMX__)
+#include "wx/os2/private.h"
#endif
#ifdef __WXMSW__
#include "wx/msw/private.h"
#endif
+// 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_FWD_BASE wxDynamicLibraryDetailsCreator;
+
// ----------------------------------------------------------------------------
// conditional compilation
// ----------------------------------------------------------------------------
-// Note: WXPM/EMX has to be tested first, since we want to use
+// Note: __OS2__/EMX has to be tested first, since we want to use
// native version, even if configure detected presence of DLOPEN.
-#if defined(__WXPM__) || defined(__EMX__) || defined(__WINDOWS__)
+#if defined(__OS2__) || defined(__EMX__) || defined(__WINDOWS__)
typedef HMODULE wxDllType;
#elif defined(HAVE_DLOPEN)
#include <dlfcn.h>
enum wxDLFlags
{
wxDL_LAZY = 0x00000001, // resolve undefined symbols at first use
+ // (only works on some Unix versions)
wxDL_NOW = 0x00000002, // resolve undefined symbols on load
+ // (default, always the case under Win32)
wxDL_GLOBAL = 0x00000004, // export extern symbols to subsequently
// loaded libs.
- wxDL_VERBATIM = 0x00000008, // Attempt to load the supplied library
+ wxDL_VERBATIM = 0x00000008, // attempt to load the supplied library
// name without appending the usual dll
// filename extension.
-
wxDL_NOSHARE = 0x00000010, // load new DLL, don't reuse already loaded
+ // (only for wxPluginManager)
- // FIXME: why? (VZ)
-#ifdef __osf__
- wxDL_DEFAULT = wxDL_LAZY
-#else
- wxDL_DEFAULT = wxDL_LAZY | wxDL_GLOBAL
-#endif
+ wxDL_DEFAULT = wxDL_NOW // default flags correspond to Win32
};
enum wxDynamicLibraryCategory
#define wxDYNLIB_FUNCTION(type, name, dynlib) \
type pfn ## name = (type)(dynlib).GetSymbol(_T(#name))
-// ---------------------------------------------------------------------------
-// wxDynamicLibrary
-// ---------------------------------------------------------------------------
+
+// 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
+// ----------------------------------------------------------------------------
+
+class WXDLLIMPEXP_BASE wxDynamicLibraryDetails
+{
+public:
+ // ctor, normally never used as these objects are only created by
+ // wxDynamicLibrary::ListLoaded()
+ wxDynamicLibraryDetails() { m_address = NULL; m_length = 0; }
+
+ // get the (base) name
+ wxString GetName() const { return m_name; }
+
+ // get the full path of this object
+ wxString GetPath() const { return m_path; }
+
+ // get the load address and the extent, return true if this information is
+ // available
+ bool GetAddress(void **addr, size_t *len) const
+ {
+ if ( !m_address )
+ return false;
+
+ if ( addr )
+ *addr = m_address;
+ if ( len )
+ *len = m_length;
+
+ return true;
+ }
+
+ // return the version of the DLL (may be empty if no version info)
+ wxString GetVersion() const
+ {
+ return m_version;
+ }
+
+private:
+ wxString m_name,
+ m_path,
+ m_version;
+
+ void *m_address;
+ size_t m_length;
+
+ friend class wxDynamicLibraryDetailsCreator;
+};
+
+WX_DECLARE_USER_EXPORTED_OBJARRAY(wxDynamicLibraryDetails,
+ wxDynamicLibraryDetailsArray,
+ WXDLLIMPEXP_BASE);
+
+// ----------------------------------------------------------------------------
+// wxDynamicLibrary: represents a handle to a DLL/shared object
+// ----------------------------------------------------------------------------
class WXDLLIMPEXP_BASE wxDynamicLibrary
{
static wxDllType GetProgramHandle();
// return the platform standard DLL extension (with leading dot)
- static const wxChar *GetDllExt() { return ms_dllext; }
+ static const wxString& GetDllExt() { return ms_dllext; }
wxDynamicLibrary() : m_handle(0) { }
wxDynamicLibrary(const wxString& libname, int flags = wxDL_DEFAULT)
// to use it polymorphically.
~wxDynamicLibrary() { Unload(); }
- // return TRUE if the library was loaded successfully
+ // return true if the library was loaded successfully
bool IsLoaded() const { return m_handle != 0; }
// load the library with the given name (full or not), return true if ok
- bool Load(wxString libname, int flags = wxDL_DEFAULT);
+ bool Load(const wxString& libname, int flags = wxDL_DEFAULT);
+
+ // raw function for loading dynamic libs: always behaves as if
+ // wxDL_VERBATIM were specified and doesn't log error message if the
+ // library couldn't be loaded but simply returns NULL
+ static wxDllType RawLoad(const wxString& libname, int flags = wxDL_DEFAULT);
// detach the library object from its handle, i.e. prevent the object from
// unloading the library in its dtor -- the caller is now responsible for
// Return the raw handle from dlopen and friends.
wxDllType GetLibHandle() const { return m_handle; }
+ // check if the given symbol is present in the library, useful to verify if
+ // a loadable module is our plugin, for example, without provoking error
+ // messages from GetSymbol()
+ bool HasSymbol(const wxString& name) const
+ {
+ bool ok;
+ DoGetSymbol(name, &ok);
+ return ok;
+ }
+
// resolve a symbol in a loaded DLL, such as a variable or function name.
// 'name' is the (possibly mangled) name of the symbol. (use extern "C" to
// export unmangled names)
//
// Returns a pointer to the symbol on success, or NULL if an error occurred
// or the symbol wasn't found.
- void *GetSymbol(const wxString& name, bool *success = 0) const;
+ void *GetSymbol(const wxString& name, bool *success = NULL) const;
+ // low-level version of GetSymbol()
+ static void *RawGetSymbol(wxDllType handle, const wxString& name);
+ void *RawGetSymbol(const wxString& name) const
+ {
+#if defined (__WXPM__) || defined(__EMX__)
+ return GetSymbol(name);
+#else
+ return RawGetSymbol(m_handle, name);
+#endif
+ }
+
+#ifdef __WXMSW__
+ // 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
+ static void *RawGetSymbolAorW(wxDllType handle, const wxString& name)
+ {
+ return RawGetSymbol
+ (
+ handle,
+ name +
+#if wxUSE_UNICODE
+ L'W'
+#else
+ 'A'
+#endif
+ );
+ }
+
+ void *GetSymbolAorW(const wxString& name) const
+ {
+ return RawGetSymbolAorW(m_handle, name);
+ }
+#endif // __WXMSW__
+
+ // return all modules/shared libraries in the address space of this process
+ //
+ // returns an empty array if not implemented or an error occurred
+ static wxDynamicLibraryDetailsArray ListLoaded();
// return platform-specific name of dynamic library with proper extension
// and prefix (e.g. "foo.dll" on Windows or "libfoo.so" on Linux)
static wxString GetPluginsDirectory();
-#if WXWIN_COMPATIBILITY_2_2
- operator bool() const { return IsLoaded(); }
-#endif
-
protected:
+ // common part of GetSymbol() and HasSymbol()
+ void *DoGetSymbol(const wxString& name, bool *success = 0) const;
+
+#ifdef wxHAVE_DYNLIB_ERROR
+ // log the error after a dlxxx() function failure
+ static void Error();
+#endif // wxHAVE_DYNLIB_ERROR
+
+
// platform specific shared lib suffix.
- static const wxChar *ms_dllext;
+ static const wxString ms_dllext;
// the handle to DLL or NULL
wxDllType m_handle;
};
-// ----------------------------------------------------------------------------
-// wxDllLoader: low level DLL functions, use wxDynamicLibrary in your code
-// ----------------------------------------------------------------------------
-
-#if WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER
-
-/*
- wxDllLoader is a class providing an interface similar to unix's dlopen().
- It is used by wxDynamicLibrary wxLibrary and manages the actual loading of
- DLLs and the resolving of symbols in them. There are no instances of this
- class, it simply serves as a namespace for its static member functions.
-*/
-class WXDLLIMPEXP_BASE wxDllLoader
-{
-public:
- /*
- This function loads the shared library libname into memory.
-
- libname may be either the full path to the file or just the filename in
- which case the library is searched for in all standard locations
- (use GetDllExt() to construct the filename)
-
- if success pointer is not NULL, it will be filled with TRUE if everything
- went ok and FALSE otherwise
- */
- static wxDllType LoadLibrary(const wxString& name, bool *success = NULL);
-
- /*
- This function unloads the shared library previously loaded with
- LoadLibrary
- */
- static void UnloadLibrary(wxDllType dll);
-
- /*
- This function returns a valid handle for the main program
- itself or NULL if back linking is not supported by the current platform
- (e.g. Win32).
- */
- static wxDllType GetProgramHandle() { return wxDynamicLibrary::GetProgramHandle(); }
-
- /*
- This function resolves a symbol in a loaded DLL, such as a
- variable or function name.
-
- dllHandle Handle of the DLL, as returned by LoadDll().
- name Name of the symbol.
-
- Returns the pointer to the symbol or NULL on error.
- */
- static void *GetSymbol(wxDllType dllHandle, const wxString &name, bool *success = 0);
-
- // return the standard DLL extension (with leading dot) for this platform
- static wxString GetDllExt() { return wxDynamicLibrary::GetDllExt(); }
-
-private:
-
- wxDllLoader(); // forbid construction of objects
-};
-
-
-// ----------------------------------------------------------------------------
-// wxLibrary
-// ----------------------------------------------------------------------------
-
-#include "wx/hash.h"
-
-class WXDLLIMPEXP_BASE wxLibrary : public wxObject
-{
-public:
- wxLibrary(wxDllType handle);
- virtual ~wxLibrary();
-
- // Get a symbol from the dynamic library
- void *GetSymbol(const wxString& symbname);
-
- // Create the object whose classname is "name"
- wxObject *CreateObject(const wxString& name);
-
-protected:
- void PrepareClasses(wxClassInfo *first);
-
- wxDllType m_handle;
-
-public:
- wxHashTable classTable;
-};
-
-// ----------------------------------------------------------------------------
-// wxLibraries
-// ----------------------------------------------------------------------------
-
-class WXDLLIMPEXP_BASE wxLibraries
-{
-public:
- wxLibraries();
- ~wxLibraries();
-
- // caller is responsible for deleting the returned pointer if !NULL
- wxLibrary *LoadLibrary(const wxString& basename);
-
- wxObject *CreateObject(const wxString& name);
-
-protected:
- wxList m_loaded;
-};
-
-// ----------------------------------------------------------------------------
-// Global variables
-// ----------------------------------------------------------------------------
-
-extern WXDLLIMPEXP_DATA_BASE(wxLibraries) wxTheLibraries;
-
-#endif // WXWIN_COMPATIBILITY_2_2 && wxUSE_DYNAMIC_LOADER
-
// ----------------------------------------------------------------------------
// Interesting defines
// ----------------------------------------------------------------------------
projects / wxWidgets.git / blobdiff