X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/609533d54db83ee9d85fe7ad9589521fcf3f6be1..1721a8c028d3b6a553634c632117fbfac102a30e:/include/wx/dynlib.h

diff --git a/include/wx/dynlib.h b/include/wx/dynlib.h
index 32b569ccdb..70287c0b19 100644
--- a/include/wx/dynlib.h
+++ b/include/wx/dynlib.h
@@ -21,6 +21,7 @@
 #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__)
@@ -32,6 +33,12 @@
 #include "wx/msw/private.h"
 #endif
 
+#if defined(HAVE_DLERROR) && !defined(__EMX__)
+    #define wxHAVE_DYNLIB_ERROR
+#endif
+
+class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator;
+
 // ----------------------------------------------------------------------------
 // conditional compilation
 // ----------------------------------------------------------------------------
@@ -106,9 +113,62 @@ enum wxPluginCategory
 #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
 {
@@ -131,11 +191,16 @@ public:
     //       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
@@ -151,6 +216,16 @@ public:
     // 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)
@@ -162,15 +237,30 @@ public:
     //
     // 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)
     static wxString CanonicalizeName(const wxString& name,
                                      wxDynamicLibraryCategory cat = wxDL_LIBRARY);
 
-    // return name of wxWindows plugin (adds compiler and version info
+    // return name of wxWidgets plugin (adds compiler and version info
     // to the filename):
     static wxString
     CanonicalizePluginName(const wxString& name,
@@ -186,6 +276,15 @@ public:
 #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;
 
@@ -220,11 +319,11 @@ public:
       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