/////////////////////////////////////////////////////////////////////////////
-// Name: dynload.h
+// Name: wx/dynload.h
// Purpose: Dynamic loading framework
// Author: Ron Lee, David Falkinder, Vadim Zeitlin and a cast of 1000's
// (derived in part from dynlib.cpp (c) 1998 Guilhem Lavaux)
// Created: 03/12/01
// RCS-ID: $Id$
// Copyright: (c) 2001 Ron Lee <ron@debian.org>
-// Licence: wxWindows license
+// Licence: wxWindows licence
/////////////////////////////////////////////////////////////////////////////
#ifndef _WX_DYNAMICLOADER_H__
#define _WX_DYNAMICLOADER_H__
-#ifdef __GNUG__
-#pragma interface "dynload.h"
-#endif
-
// ----------------------------------------------------------------------------
// headers
// ----------------------------------------------------------------------------
#if wxUSE_DYNAMIC_LOADER
-#include "wx/hash.h"
+#include "wx/dynlib.h"
+#include "wx/hashmap.h"
#include "wx/module.h"
+class WXDLLIMPEXP_FWD_BASE wxPluginLibrary;
-// Ugh, I'd much rather this was typesafe, but no time
-// to rewrite wxHashTable right now..
-
-typedef wxHashTable wxDLManifest;
-typedef wxHashTable wxDLImports;
-
-// ----------------------------------------------------------------------------
-// conditional compilation
-// ----------------------------------------------------------------------------
-
- // Note: WXPM/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__)
-#define INCL_DOS
-#include <os2.h>
- typedef HMODULE 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(__WINDOWS__)
-#include <windows.h> // needed to get HMODULE
- typedef HMODULE wxDllType;
-#elif defined(__DARWIN__)
- typedef void *wxDllType;
-#elif defined(__WXMAC__)
- typedef CFragConnectionID wxDllType;
-#else
-#error "wxLibrary can't be compiled on this platform, sorry."
-#endif
-
- // LoadLibrary is defined in windows.h as LoadLibraryA, but wxDllLoader
- // method should be called LoadLibrary, not LoadLibraryA or LoadLibraryW!
-
-#if defined(__WIN32__) && defined(LoadLibrary)
-# include "wx/msw/winundef.h"
-#endif
+WX_DECLARE_STRING_HASH_MAP_WITH_DECL(wxPluginLibrary *, wxDLManifest,
+ class WXDLLIMPEXP_BASE);
+typedef wxDLManifest wxDLImports;
// ---------------------------------------------------------------------------
-// wxDllLoader
+// wxPluginLibrary
// ---------------------------------------------------------------------------
- // Cross platform wrapper for dlopen and friends.
- // There are no instances of this class, it simply
- // serves as a namespace for its static member functions.
+// NOTE: Do not attempt to use a base class pointer to this class.
+// wxDL is not virtual and we deliberately hide some of it's
+// methods here.
+//
+// Unless you know exacty why you need to, you probably shouldn't
+// instantiate this class directly anyway, use wxPluginManager
+// instead.
-class WXDLLEXPORT wxDllLoader
+class WXDLLIMPEXP_BASE wxPluginLibrary : public wxDynamicLibrary
{
public:
- // 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.
- // The platform specific library extension is automatically appended.
-
- static wxDllType Load(const wxString& name);
-
- // The same as Load, except 'name' is searched for without modification.
-
- static wxDllType LoadLibrary(const wxString& name);
- static void UnloadLibrary(wxDllType dll);
-
- // return a valid handle for the main program itself or NULL if
- // back linking is not supported by the current platform (e.g. Win32)
+ static wxDLImports* ms_classes; // Static hash of all imported classes.
- static wxDllType GetProgramHandle();
+ wxPluginLibrary( const wxString &libname, int flags = wxDL_DEFAULT );
+ ~wxPluginLibrary();
- // resolve a symbol in a loaded DLL, such as a variable or function
- // name. dllHandle is a handle previously returned by LoadLibrary(),
- // symbol is the (possibly mangled) name of the symbol.
- // (use extern "C" to export unmangled names)
- //
- // Since it is perfectly valid for the returned symbol to actually be
- // NULL, that is not always indication of an error. Pass and test the
- // parameter 'success' for a true indication of success or failure to
- // load the symbol.
- //
- // Returns a pointer to the symbol on success.
+ wxPluginLibrary *RefLib();
+ bool UnrefLib();
- static void *GetSymbol(wxDllType dllHandle, const wxString &name, bool *success = 0);
+ // These two are called by the PluginSentinel on (PLUGGABLE) object
+ // creation/destruction. There is usually no reason for the user to
+ // call them directly. We have to separate this from the link count,
+ // since the two are not interchangeable.
- // return the platform standard DLL extension (with leading dot)
-
- static const wxString &GetDllExt() { return ms_dllext; }
-
-private:
-
- wxDllLoader(); // forbid construction of objects
- static const wxString ms_dllext; // Platform specific shared lib suffix.
-};
-
-
-// ---------------------------------------------------------------------------
-// wxDynamicLibrary
-// ---------------------------------------------------------------------------
+ // FIXME: for even better debugging PluginSentinel should register
+ // the name of the class created too, then we can state
+ // exactly which object was not destroyed which may be
+ // difficult to find otherwise. Also this code should
+ // probably only be active in DEBUG mode, but let's just
+ // get it right first.
-class wxDLManifestEntry
-{
-public:
-
- static wxDLImports ms_classes; // Static hash of all imported classes.
-
- wxDLManifestEntry( const wxString &libname );
- ~wxDLManifestEntry();
-
- wxDLManifestEntry *Ref() { ++m_count; return this; }
- bool Unref() { return (m_count-- < 2) ? (delete this, TRUE) : FALSE; }
-
- bool IsLoaded() const { return m_count > 0; }
-
- wxDllType GetLinkHandle() const { return m_handle; }
- wxDllType GetProgramHandle() const { return wxDllLoader::GetProgramHandle(); }
- void *GetSymbol(const wxString &symbol, bool *success = 0)
+ void RefObj() { ++m_objcount; }
+ void UnrefObj()
{
- return wxDllLoader::GetSymbol( m_handle, symbol, success );
+ wxASSERT_MSG( m_objcount > 0, wxT("Too many objects deleted??") );
+ --m_objcount;
}
-private:
+ // Override/hide some base class methods
+
+ bool IsLoaded() const { return m_linkcount > 0; }
+ void Unload() { UnrefLib(); }
- // Order of these three *is* important, do not change it
+private:
- wxClassInfo *m_before; // sm_first before loading this lib
- wxDllType m_handle; // Handle from dlopen.
- wxClassInfo *m_after; // ..and after.
+ // These pointers may be NULL but if they are not, then m_ourLast follows
+ // m_ourFirst in the linked list, i.e. can be found by calling GetNext() a
+ // sufficient number of times.
+ const wxClassInfo *m_ourFirst; // first class info in this plugin
+ const wxClassInfo *m_ourLast; // ..and the last one
- size_t m_count; // Ref count of Link and Create calls.
- wxModuleList m_wxmodules; // any wxModules that we initialised.
+ size_t m_linkcount; // Ref count of library link calls
+ size_t m_objcount; // ..and (pluggable) object instantiations.
+ wxModuleList m_wxmodules; // any wxModules that we initialised.
- void UpdateClassInfo(); // Update the wxClassInfo table
- void RestoreClassInfo(); // Restore the original wxClassInfo state.
- void RegisterModules(); // Init any wxModules in the lib.
- void UnregisterModules(); // Cleanup any wxModules we installed.
+ void UpdateClasses(); // Update ms_classes
+ void RestoreClasses(); // Removes this library from ms_classes
+ void RegisterModules(); // Init any wxModules in the lib.
+ void UnregisterModules(); // Cleanup any wxModules we installed.
-DECLARE_NO_COPY_CLASS(wxDLManifestEntry)
+ wxDECLARE_NO_COPY_CLASS(wxPluginLibrary);
};
-class WXDLLEXPORT wxDynamicLibrary
+class WXDLLIMPEXP_BASE wxPluginManager
{
public:
// Static accessors.
- static wxDLManifestEntry *Link(const wxString &libname);
- static bool Unlink(const wxString &libname);
+ static wxPluginLibrary *LoadLibrary( const wxString &libname,
+ int flags = wxDL_DEFAULT );
+ static bool UnloadLibrary(const wxString &libname);
// Instance methods.
- wxDynamicLibrary(const wxString &libname);
- ~wxDynamicLibrary();
+ wxPluginManager() : m_entry(NULL) {}
+ wxPluginManager(const wxString &libname, int flags = wxDL_DEFAULT)
+ {
+ Load(libname, flags);
+ }
+ ~wxPluginManager() { if ( IsLoaded() ) Unload(); }
+
+ bool Load(const wxString &libname, int flags = wxDL_DEFAULT);
+ void Unload();
bool IsLoaded() const { return m_entry && m_entry->IsLoaded(); }
void *GetSymbol(const wxString &symbol, bool *success = 0)
return m_entry->GetSymbol( symbol, success );
}
+ static void CreateManifest() { ms_manifest = new wxDLManifest(wxKEY_STRING); }
+ static void ClearManifest() { delete ms_manifest; ms_manifest = NULL; }
+
private:
+ // return the pointer to the entry for the library with given name in
+ // ms_manifest or NULL if none
+ static wxPluginLibrary *FindByName(const wxString& name)
+ {
+ const wxDLManifest::iterator i = ms_manifest->find(name);
+
+ return i == ms_manifest->end() ? NULL : i->second;
+ }
- static wxDLManifest ms_manifest; // Static hash of loaded libs.
- wxDLManifestEntry *m_entry; // Cache our entry in the manifest.
+ static wxDLManifest* ms_manifest; // Static hash of loaded libs.
+ wxPluginLibrary* m_entry; // Cache our entry in the manifest.
// We could allow this class to be copied if we really
// wanted to, but not without modification.
-
-DECLARE_NO_COPY_CLASS(wxDynamicLibrary)
+ wxDECLARE_NO_COPY_CLASS(wxPluginManager);
};
#endif // wxUSE_DYNAMIC_LOADER
#endif // _WX_DYNAMICLOADER_H__
-// vi:sts=4:sw=4:et
projects / wxWidgets.git / blobdiff