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 wxString 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
 143 #ifdef __WXWINCE__
 144     return ::GetModuleHandleW(wxConvLibc.cMB2WC(name).data());
 145 #else
 146     return ::GetModuleHandleA((char *)name);
 147 #endif
 148 }
 149
 150 // ============================================================================
 151 // wxVersionDLL implementation
 152 // ============================================================================
 153
 154 // ----------------------------------------------------------------------------
 155 // loading
 156 // ----------------------------------------------------------------------------
 157
 158 wxVersionDLL::wxVersionDLL()
 159 {
 160     // don't give errors if DLL can't be loaded or used, we're prepared to
 161     // handle it
 162     wxLogNull noLog;
 163
 164     if ( m_dll.Load(_T("version.dll"), wxDL_VERBATIM) )
 165     {
 166         // the functions we load have either 'A' or 'W' suffix depending on
 167         // whether we're in ANSI or Unicode build
 168         #ifdef UNICODE
 169             #define SUFFIX L"W"
 170         #else // ANSI
 171             #define SUFFIX "A"
 172         #endif // UNICODE/ANSI
 173
 174         #define LOAD_VER_FUNCTION(name)                                       \
 175             m_pfn ## name = (name ## _t)m_dll.GetSymbol(_T(#name SUFFIX));    \
 176         if ( !m_pfn ## name )                                                 \
 177         {                                                                     \
 178             m_dll.Unload();                                                   \
 179             return;                                                           \
 180         }
 181
 182         DO_FOR_ALL_VER_FUNCS(LOAD_VER_FUNCTION);
 183
 184         #undef LOAD_VER_FUNCTION
 185     }
 186 }
 187
 188 // ----------------------------------------------------------------------------
 189 // wxVersionDLL operations
 190 // ----------------------------------------------------------------------------
 191
 192 wxString wxVersionDLL::GetFileVersion(const wxString& filename) const
 193 {
 194     wxString ver;
 195     if ( m_dll.IsLoaded() )
 196     {
 197         wxChar *pc = wx_const_cast(wxChar *, filename.wx_str());
 198
 199         DWORD dummy;
 200         DWORD sizeVerInfo = m_pfnGetFileVersionInfoSize(pc, &dummy);
 201         if ( sizeVerInfo )
 202         {
 203             wxCharBuffer buf(sizeVerInfo);
 204             if ( m_pfnGetFileVersionInfo(pc, 0, sizeVerInfo, buf.data()) )
 205             {
 206                 void *pVer;
 207                 UINT sizeInfo;
 208                 if ( m_pfnVerQueryValue(buf.data(), _T("\\"), &pVer, &sizeInfo) )
 209                 {
 210                     VS_FIXEDFILEINFO *info = (VS_FIXEDFILEINFO *)pVer;
 211                     ver.Printf(_T("%d.%d.%d.%d"),
 212                                HIWORD(info->dwFileVersionMS),
 213                                LOWORD(info->dwFileVersionMS),
 214                                HIWORD(info->dwFileVersionLS),
 215                                LOWORD(info->dwFileVersionLS));
 216                 }
 217             }
 218         }
 219     }
 220     //else: we failed to load DLL, can't retrieve version info
 221
 222     return ver;
 223 }
 224
 225 // ============================================================================
 226 // wxDynamicLibraryDetailsCreator implementation
 227 // ============================================================================
 228
 229 /* static */
 230 BOOL CALLBACK
 231 wxDynamicLibraryDetailsCreator::EnumModulesProc(NameStr_t name,
 232                                                 DWORD_32_64 base,
 233                                                 ULONG size,
 234                                                 void *data)
 235 {
 236     EnumModulesProcParams *params = (EnumModulesProcParams *)data;
 237
 238     wxDynamicLibraryDetails *details = new wxDynamicLibraryDetails;
 239
 240     // fill in simple properties
 241     details->m_name = wxString::FromAscii(name);
 242     details->m_address = wx_reinterpret_cast(void *, base);
 243     details->m_length = size;
 244
 245     // to get the version, we first need the full path
 246     HMODULE hmod = wxGetModuleHandle(name, (void *)base);
 247     if ( hmod )
 248     {
 249         wxString fullname = wxGetFullModuleName(hmod);
 250         if ( !fullname.empty() )
 251         {
 252             details->m_path = fullname;
 253             details->m_version = params->verDLL->GetFileVersion(fullname);
 254         }
 255     }
 256
 257     params->dlls->Add(details);
 258
 259     // continue enumeration (returning FALSE would have stopped it)
 260     return TRUE;
 261 }
 262
 263 // ============================================================================
 264 // wxDynamicLibrary implementation
 265 // ============================================================================
 266
 267 // ----------------------------------------------------------------------------
 268 // misc functions
 269 // ----------------------------------------------------------------------------
 270
 271 wxDllType wxDynamicLibrary::GetProgramHandle()
 272 {
 273     return (wxDllType)::GetModuleHandle(NULL);
 274 }
 275
 276 // ----------------------------------------------------------------------------
 277 // loading/unloading DLLs
 278 // ----------------------------------------------------------------------------
 279
 280 /* static */
 281 wxDllType
 282 wxDynamicLibrary::RawLoad(const wxString& libname, int WXUNUSED(flags))
 283 {
 284     return ::LoadLibrary(libname.wx_str());
 285 }
 286
 287 /* static */
 288 void wxDynamicLibrary::Unload(wxDllType handle)
 289 {
 290     ::FreeLibrary(handle);
 291 }
 292
 293 /* static */
 294 void *wxDynamicLibrary::RawGetSymbol(wxDllType handle, const wxString& name)
 295 {
 296     return (void *)::GetProcAddress(handle,
 297 #ifdef __WXWINCE__
 298                                             name.c_str()
 299 #else
 300                                             name.ToAscii()
 301 #endif // __WXWINCE__
 302                                    );
 303 }
 304
 305 // ----------------------------------------------------------------------------
 306 // enumerating loaded DLLs
 307 // ----------------------------------------------------------------------------
 308
 309 /* static */
 310 wxDynamicLibraryDetailsArray wxDynamicLibrary::ListLoaded()
 311 {
 312     wxDynamicLibraryDetailsArray dlls;
 313
 314 #if wxUSE_DBGHELP
 315     if ( wxDbgHelpDLL::Init() )
 316     {
 317         // prepare to use functions for version info extraction
 318         wxVersionDLL verDLL;
 319
 320         wxDynamicLibraryDetailsCreator::EnumModulesProcParams params;
 321         params.dlls = &dlls;
 322         params.verDLL = &verDLL;
 323
 324         if ( !wxDbgHelpDLL::EnumerateLoadedModules
 325                             (
 326                                 ::GetCurrentProcess(),
 327                                 wxDynamicLibraryDetailsCreator::EnumModulesProc,
 328                                 &params
 329                             ) )
 330         {
 331             wxLogLastError(_T("EnumerateLoadedModules"));
 332         }
 333     }
 334 #endif // wxUSE_DBGHELP
 335
 336     return dlls;
 337 }
 338
 339 #endif // wxUSE_DYNLIB_CLASS
 340