src/msw/dlmsw.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        msw/dlmsw.cpp
   3 // Purpose:     Win32-specific part of wxDynamicLibrary and related classes
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     2005-01-10 (partly extracted from common/dynlib.cpp)
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1998-2005 Vadim Zeitlin <vadim@wxwindows.org>
   9 // Licence:     wxWindows licence
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 // ============================================================================
  13 // declarations
  14 // ============================================================================
  15
  16 // ----------------------------------------------------------------------------
  17 // headers
  18 // ----------------------------------------------------------------------------
  19
  20 #include  "wx/wxprec.h"
  21
  22 #ifdef __BORLANDC__
  23   #pragma hdrstop
  24 #endif
  25
  26 #if wxUSE_DYNLIB_CLASS
  27
  28 #include "wx/msw/private.h"
  29 #include "wx/msw/debughlp.h"
  30
  31 const wxChar *wxDynamicLibrary::ms_dllext = _T(".dll");
  32
  33 // ----------------------------------------------------------------------------
  34 // private classes
  35 // ----------------------------------------------------------------------------
  36
  37 // wrap some functions from version.dll: load them dynamically and provide a
  38 // clean interface
  39 class wxVersionDLL
  40 {
  41 public:
  42     // load version.dll and bind to its functions
  43     wxVersionDLL();
  44
  45     // return the file version as string, e.g. "x.y.z.w"
  46     wxString GetFileVersion(const wxString& filename) const;
  47
  48 private:
  49     typedef DWORD (APIENTRY *GetFileVersionInfoSize_t)(PTSTR, PDWORD);
  50     typedef BOOL (APIENTRY *GetFileVersionInfo_t)(PTSTR, DWORD, DWORD, PVOID);
  51     typedef BOOL (APIENTRY *VerQueryValue_t)(const PVOID, PTSTR, PVOID *, PUINT);
  52
  53     #define DO_FOR_ALL_VER_FUNCS(what)                                        \
  54         what(GetFileVersionInfoSize);                                         \
  55         what(GetFileVersionInfo);                                             \
  56         what(VerQueryValue)
  57
  58     #define DECLARE_VER_FUNCTION(func) func ## _t m_pfn ## func
  59
  60     DO_FOR_ALL_VER_FUNCS(DECLARE_VER_FUNCTION);
  61
  62     #undef DECLARE_VER_FUNCTION
  63
  64
  65     wxDynamicLibrary m_dll;
  66
  67
  68     DECLARE_NO_COPY_CLASS(wxVersionDLL)
  69 };
  70
  71 // class used to create wxDynamicLibraryDetails objects
  72 class WXDLLIMPEXP_BASE wxDynamicLibraryDetailsCreator
  73 {
  74 public:
  75     // type of parameters being passed to EnumModulesProc
  76     struct EnumModulesProcParams
  77     {
  78         wxDynamicLibraryDetailsArray *dlls;
  79         wxVersionDLL *verDLL;
  80     };
  81
  82     // the declared type of the first EnumModulesProc() parameter changed in
  83     // recent SDK versions and is no PCSTR instead of old PSTR, we know that
  84     // it's const in version 11 and non-const in version 8 included with VC8
  85     // (and earlier), suppose that it's only changed in version 11
  86     #if defined(API_VERSION_NUMBER) && API_VERSION_NUMBER >= 11
  87         typedef PCSTR NameStr_t;
  88     #else
  89         typedef PSTR NameStr_t;
  90     #endif
  91
  92     // TODO: fix EnumerateLoadedModules() to use EnumerateLoadedModules64()
  93     #ifdef __WIN64__
  94         typedef DWORD64 DWORD_32_64;
  95     #else
  96         typedef DWORD DWORD_32_64;
  97     #endif
  98
  99     static BOOL CALLBACK
 100     EnumModulesProc(NameStr_t name, DWORD_32_64 base, ULONG size, void *data);
 101 };
 102
 103 // ----------------------------------------------------------------------------
 104 // private functions
 105 // ----------------------------------------------------------------------------
 106
 107 // return the module handle for the given base name
 108 static
 109 HMODULE wxGetModuleHandle(const char *name, void *addr)
 110 {
 111     // we want to use GetModuleHandleEx() instead of usual GetModuleHandle()
 112     // because the former works correctly for comctl32.dll while the latter
 113     // returns NULL when comctl32.dll version 6 is used under XP (note that
 114     // GetModuleHandleEx() is only available under XP and later, coincidence?)
 115
 116     // check if we can use GetModuleHandleEx
 117     typedef BOOL (WINAPI *GetModuleHandleEx_t)(DWORD, LPCSTR, HMODULE *);
 118
 119     static const GetModuleHandleEx_t INVALID_FUNC_PTR = (GetModuleHandleEx_t)-1;
 120
 121     static GetModuleHandleEx_t s_pfnGetModuleHandleEx = INVALID_FUNC_PTR;
 122     if ( s_pfnGetModuleHandleEx == INVALID_FUNC_PTR )
 123     {
 124         wxDynamicLibrary dll(_T("kernel32.dll"), wxDL_VERBATIM);
 125         s_pfnGetModuleHandleEx =
 126             (GetModuleHandleEx_t)dll.RawGetSymbol(_T("GetModuleHandleExA"));
 127
 128         // dll object can be destroyed, kernel32.dll won't be unloaded anyhow
 129     }
 130
 131     // get module handle from its address
 132     if ( s_pfnGetModuleHandleEx )
 133     {
 134         // flags are GET_MODULE_HANDLE_EX_FLAG_UNCHANGED_REFCOUNT |
 135         //           GET_MODULE_HANDLE_EX_FLAG_FROM_ADDRESS
 136         HMODULE hmod;
 137         if ( s_pfnGetModuleHandleEx(6, (char *)addr, &hmod) && hmod )
 138             return hmod;
 139     }
 140
 141     // Windows CE only has Unicode API, so even we have an ANSI string here, we
 142     // still need to use GetModuleHandleW() there and so do it everywhere to
 143     // avoid #ifdefs -- this code is not performance-critical anyhow...
 144     return ::GetModuleHandle(wxString::FromAscii((char *)name));
 145 }
 146
 147 // ============================================================================
 148 // wxVersionDLL implementation
 149 // ============================================================================
 150
 151 // ----------------------------------------------------------------------------
 152 // loading
 153 // ----------------------------------------------------------------------------
 154
 155 wxVersionDLL::wxVersionDLL()
 156 {
 157     // don't give errors if DLL can't be loaded or used, we're prepared to
 158     // handle it
 159     wxLogNull noLog;
 160
 161     if ( m_dll.Load(_T("version.dll"), wxDL_VERBATIM) )
 162     {
 163         // the functions we load have either 'A' or 'W' suffix depending on
 164         // whether we're in ANSI or Unicode build
 165         #ifdef UNICODE
 166             #define SUFFIX L"W"
 167         #else // ANSI
 168             #define SUFFIX "A"
 169         #endif // UNICODE/ANSI
 170
 171         #define LOAD_VER_FUNCTION(name)                                       \
 172             m_pfn ## name = (name ## _t)m_dll.GetSymbol(_T(#name SUFFIX));    \
 173         if ( !m_pfn ## name )                                                 \
 174         {                                                                     \
 175             m_dll.Unload();                                                   \
 176             return;                                                           \
 177         }
 178
 179         DO_FOR_ALL_VER_FUNCS(LOAD_VER_FUNCTION);
 180
 181         #undef LOAD_VER_FUNCTION
 182     }
 183 }
 184
 185 // ----------------------------------------------------------------------------
 186 // wxVersionDLL operations
 187 // ----------------------------------------------------------------------------
 188
 189 wxString wxVersionDLL::GetFileVersion(const wxString& filename) const
 190 {
 191     wxString ver;
 192     if ( m_dll.IsLoaded() )
 193     {
 194         wxChar *pc = wx_const_cast(wxChar *, filename.c_str());
 195
 196         DWORD dummy;
 197         DWORD sizeVerInfo = m_pfnGetFileVersionInfoSize(pc, &dummy);
 198         if ( sizeVerInfo )
 199         {
 200             wxCharBuffer buf(sizeVerInfo);
 201             if ( m_pfnGetFileVersionInfo(pc, 0, sizeVerInfo, buf.data()) )
 202             {
 203                 void *pVer;
 204                 UINT sizeInfo;
 205                 if ( m_pfnVerQueryValue(buf.data(), _T("\\"), &pVer, &sizeInfo) )
 206                 {
 207                     VS_FIXEDFILEINFO *info = (VS_FIXEDFILEINFO *)pVer;
 208                     ver.Printf(_T("%d.%d.%d.%d"),
 209                                HIWORD(info->dwFileVersionMS),
 210                                LOWORD(info->dwFileVersionMS),
 211                                HIWORD(info->dwFileVersionLS),
 212                                LOWORD(info->dwFileVersionLS));
 213                 }
 214             }
 215         }
 216     }
 217     //else: we failed to load DLL, can't retrieve version info
 218
 219     return ver;
 220 }
 221
 222 // ============================================================================
 223 // wxDynamicLibraryDetailsCreator implementation
 224 // ============================================================================
 225
 226 /* static */
 227 BOOL CALLBACK
 228 wxDynamicLibraryDetailsCreator::EnumModulesProc(NameStr_t name,
 229                                                 DWORD_32_64 base,
 230                                                 ULONG size,
 231                                                 void *data)
 232 {
 233     EnumModulesProcParams *params = (EnumModulesProcParams *)data;
 234
 235     wxDynamicLibraryDetails *details = new wxDynamicLibraryDetails;
 236
 237     // fill in simple properties
 238     details->m_name = wxString::FromAscii(name);
 239     details->m_address = wx_reinterpret_cast(void *, base);
 240     details->m_length = size;
 241
 242     // to get the version, we first need the full path
 243     HMODULE hmod = wxGetModuleHandle(name, (void *)base);
 244     if ( hmod )
 245     {
 246         wxString fullname = wxGetFullModuleName(hmod);
 247         if ( !fullname.empty() )
 248         {
 249             details->m_path = fullname;
 250             details->m_version = params->verDLL->GetFileVersion(fullname);
 251         }
 252     }
 253
 254     params->dlls->Add(details);
 255
 256     // continue enumeration (returning FALSE would have stopped it)
 257     return TRUE;
 258 }
 259
 260 // ============================================================================
 261 // wxDynamicLibrary implementation
 262 // ============================================================================
 263
 264 // ----------------------------------------------------------------------------
 265 // misc functions
 266 // ----------------------------------------------------------------------------
 267
 268 wxDllType wxDynamicLibrary::GetProgramHandle()
 269 {
 270     return (wxDllType)::GetModuleHandle(NULL);
 271 }
 272
 273 // ----------------------------------------------------------------------------
 274 // loading/unloading DLLs
 275 // ----------------------------------------------------------------------------
 276
 277 /* static */
 278 wxDllType
 279 wxDynamicLibrary::RawLoad(const wxString& libname, int WXUNUSED(flags))
 280 {
 281     return ::LoadLibrary(libname);
 282 }
 283
 284 /* static */
 285 void wxDynamicLibrary::Unload(wxDllType handle)
 286 {
 287     ::FreeLibrary(handle);
 288 }
 289
 290 /* static */
 291 void *wxDynamicLibrary::RawGetSymbol(wxDllType handle, const wxString& name)
 292 {
 293     return (void *)::GetProcAddress(handle,
 294 #ifdef __WXWINCE__
 295                                             name.c_str()
 296 #else
 297                                             name.ToAscii()
 298 #endif // __WXWINCE__
 299                                    );
 300 }
 301
 302 // ----------------------------------------------------------------------------
 303 // enumerating loaded DLLs
 304 // ----------------------------------------------------------------------------
 305
 306 /* static */
 307 wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
 308 {
 309     wxDynamicLibraryDetailsArray dlls;
 310
 311 #if wxUSE_DBGHELP
 312     if ( wxDbgHelpDLL::Init() )
 313     {
 314         // prepare to use functions for version info extraction
 315         wxVersionDLL verDLL;
 316
 317         wxDynamicLibraryDetailsCreator::EnumModulesProcParams params;
 318         params.dlls = &dlls;
 319         params.verDLL = &verDLL;
 320
 321         if ( !wxDbgHelpDLL::EnumerateLoadedModules
 322                             (
 323                                 ::GetCurrentProcess(),
 324                                 wxDynamicLibraryDetailsCreator::EnumModulesProc,
 325                                 &params
 326                             ) )
 327         {
 328             wxLogLastError(_T("EnumerateLoadedModules"));
 329         }
 330     }
 331 #endif // wxUSE_DBGHELP
 332
 333     return dlls;
 334 }
 335
 336 #endif // wxUSE_DYNLIB_CLASS
 337