// Created: 20/07/98
// RCS-ID: $Id$
// Copyright: (c) 1998 Guilhem Lavaux
-// Licence: wxWidgets licence
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DYNLIB_H__
# 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__)
#include "wx/msw/private.h"
#endif
+#if defined(HAVE_DLERROR) && !defined(__EMX__)
+ #define wxHAVE_DYNLIB_ERROR
+#endif
+
+class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator;
+
// ----------------------------------------------------------------------------
// conditional compilation
// ----------------------------------------------------------------------------
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
-// ---------------------------------------------------------------------------
+// ----------------------------------------------------------------------------
+// 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
{
// 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
+ }
+
+ // return all modules/shared libraries in the address space of this process
+ //
+ // returns an empty array if not implemented or an error occured
+ 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)
#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;
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
+ 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
projects / wxWidgets.git / blobdiff