src/common/init.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        common/init.cpp
   3 // Purpose:     initialisation for the library
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     04.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) Vadim Zeitlin
   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  //__BORLANDC__
  25
  26 #ifndef WX_PRECOMP
  27     #include "wx/app.h"
  28     #include "wx/debug.h"
  29     #include "wx/filefn.h"
  30 #endif
  31
  32 #include "wx/module.h"
  33
  34 // ----------------------------------------------------------------------------
  35 // global vars
  36 // ----------------------------------------------------------------------------
  37
  38 wxApp * WXDLLEXPORT wxTheApp = NULL;
  39
  40 wxAppInitializerFunction
  41     wxAppBase::m_appInitFn = (wxAppInitializerFunction)NULL;
  42
  43 // ----------------------------------------------------------------------------
  44 // private classes
  45 // ----------------------------------------------------------------------------
  46
  47 class /* no WXDLLEXPORT */ wxConsoleApp : public wxApp
  48 {
  49 public:
  50     virtual int OnRun() { wxFAIL_MSG(wxT("unreachable")); return 0; }
  51 };
  52
  53 // ----------------------------------------------------------------------------
  54 // private functions
  55 // ----------------------------------------------------------------------------
  56
  57 static bool DoInit();
  58 static void DoCleanUp();
  59
  60 // ----------------------------------------------------------------------------
  61 // private vars
  62 // ----------------------------------------------------------------------------
  63
  64 static size_t gs_nInitCount = 0;
  65
  66 // ============================================================================
  67 // implementation
  68 // ============================================================================
  69
  70 // ----------------------------------------------------------------------------
  71 // stubs for some GUI functions
  72 // ----------------------------------------------------------------------------
  73
  74 void WXDLLEXPORT wxExit()
  75 {
  76     abort();
  77 }
  78
  79 // Yield to other apps/messages
  80 bool WXDLLEXPORT wxYield()
  81 {
  82     // do nothing
  83     return TRUE;
  84 }
  85
  86 // Yield to other apps/messages
  87 void WXDLLEXPORT wxWakeUpIdle()
  88 {
  89     // do nothing
  90 }
  91
  92 // ----------------------------------------------------------------------------
  93 // wxBase-specific functions
  94 // ----------------------------------------------------------------------------
  95
  96 bool WXDLLEXPORT wxInitialize()
  97 {
  98     if ( gs_nInitCount )
  99     {
 100         // already initialized
 101         return TRUE;
 102     }
 103
 104     wxASSERT_MSG( !wxTheApp,
 105                   wxT("either call wxInitialize or create app, not both!") );
 106
 107     if ( !DoInit() )
 108     {
 109         return FALSE;
 110     }
 111
 112     wxTheApp = new wxConsoleApp;
 113
 114     if ( !wxTheApp )
 115     {
 116         return FALSE;
 117     }
 118
 119     gs_nInitCount++;
 120
 121     return TRUE;
 122 }
 123
 124 void WXDLLEXPORT wxUninitialize()
 125 {
 126     if ( !--gs_nInitCount )
 127     {
 128         DoCleanUp();
 129     }
 130 }
 131
 132 int wxEntry(int argc, char **argv)
 133 {
 134     // library initialization
 135     if ( !DoInit() )
 136     {
 137         return -1;
 138     }
 139
 140     // create the app
 141     if ( !wxTheApp )
 142     {
 143         wxCHECK_MSG( wxApp::GetInitializerFunction(), -1,
 144                 wxT("No application object: use IMPLEMENT_APP macro.") );
 145
 146         wxAppInitializerFunction fnCreate = wxApp::GetInitializerFunction();
 147
 148         wxTheApp = (wxApp *)fnCreate();
 149     }
 150
 151     wxCHECK_MSG( wxTheApp, -1, wxT("wxWindows error: no application object") );
 152
 153     // app preinitialization
 154     wxTheApp->argc = argc;
 155
 156 #if wxUSE_UNICODE
 157     wxTheApp->argv = new wxChar*[argc+1];
 158     int mb_argc = 0;
 159     while (mb_argc < argc)
 160     {
 161         wxTheApp->argv[mb_argc] = wxStrdup(wxConvLibc.cMB2WX(argv[mb_argc]));
 162         mb_argc++;
 163     }
 164     wxTheApp->argv[mb_argc] = (wxChar *)NULL;
 165 #else
 166     wxTheApp->argv = argv;
 167 #endif
 168
 169     wxString name = wxFileNameFromPath(argv[0]);
 170     wxStripExtension(name);
 171     wxTheApp->SetAppName(name);
 172
 173     int retValue = 0;
 174
 175     // app initialization
 176     if ( !wxTheApp->OnInit() )
 177         retValue = -1;
 178
 179     // app execution
 180     if ( retValue == 0 )
 181     {
 182         retValue = wxTheApp->OnRun();
 183
 184         // app clean up
 185         wxTheApp->OnExit();
 186     }
 187
 188     // library clean up
 189     DoCleanUp();
 190
 191     return retValue;
 192 }
 193
 194 // ----------------------------------------------------------------------------
 195 // private functions
 196 // ----------------------------------------------------------------------------
 197
 198 static bool DoInit()
 199 {
 200     wxClassInfo::InitializeClasses();
 201
 202     wxModule::RegisterModules();
 203     if ( !wxModule::InitializeModules() )
 204     {
 205         return FALSE;
 206     }
 207
 208     return TRUE;
 209 }
 210
 211 static void DoCleanUp()
 212 {
 213 #if wxUSE_LOG
 214     // flush the logged messages if any
 215     wxLog *log = wxLog::GetActiveTarget();
 216     if (log != NULL && log->HasPendingMessages())
 217         log->Flush();
 218
 219     // continuing to use user defined log target is unsafe from now on because
 220     // some resources may be already unavailable, so replace it by something
 221     // more safe
 222     wxLog *oldlog = wxLog::SetActiveTarget(new wxLogStderr);
 223     if ( oldlog )
 224         delete oldlog;
 225 #endif // wxUSE_LOG
 226
 227     wxModule::CleanUpModules();
 228
 229     wxClassInfo::CleanUpClasses();
 230
 231     // delete the application object
 232     delete wxTheApp;
 233     wxTheApp = (wxApp *)NULL;
 234 }