samples/console/console.cpp

   1 /////////////////////////////////////////////////////////////////////////////
   2 // Name:        samples/console/console.cpp
   3 // Purpose:     a sample console (as opposed to GUI) progam using wxWindows
   4 // Author:      Vadim Zeitlin
   5 // Modified by:
   6 // Created:     04.10.99
   7 // RCS-ID:      $Id$
   8 // Copyright:   (c) 1999 Vadim Zeitlin <zeitlin@dptmaths.ens-cachan.fr>
   9 // Licence:     wxWindows license
  10 /////////////////////////////////////////////////////////////////////////////
  11
  12 #include <stdio.h>
  13
  14 #include <wx/string.h>
  15 #include <wx/file.h>
  16 #include <wx/app.h>
  17 #include <wx/thread.h>
  18
  19 static size_t gs_counter = (size_t)-1;
  20 static wxCriticalSection gs_critsect;
  21
  22 class MyThread : public wxThread
  23 {
  24 public:
  25     MyThread(char ch);
  26
  27     // thread execution starts here
  28     virtual void *Entry();
  29
  30     // and stops here
  31     virtual void OnExit();
  32
  33 public:
  34     char m_ch;
  35 };
  36
  37 MyThread::MyThread(char ch)
  38 {
  39     m_ch = ch;
  40
  41     Create();
  42 }
  43
  44 void *MyThread::Entry()
  45 {
  46     {
  47         wxCriticalSectionLocker lock(gs_critsect);
  48         if ( gs_counter == (size_t)-1 )
  49             gs_counter = 1;
  50         else
  51             gs_counter++;
  52     }
  53
  54     for ( size_t n = 0; n < 10; n++ )
  55     {
  56         if ( TestDestroy() )
  57             break;
  58
  59         putchar(m_ch);
  60         fflush(stdout);
  61
  62         wxThread::Sleep(100);
  63     }
  64
  65     return NULL;
  66 }
  67
  68 void MyThread::OnExit()
  69 {
  70     wxCriticalSectionLocker lock(gs_critsect);
  71     gs_counter--;
  72 }
  73
  74 int main(int argc, char **argv)
  75 {
  76     if ( !wxInitialize() )
  77     {
  78         fprintf(stderr, "Failed to initialize the wxWindows library, aborting.");
  79     }
  80
  81     static const size_t nThreads = 3;
  82     MyThread *threads[nThreads];
  83     size_t n;
  84     for ( n = 0; n < nThreads; n++ )
  85     {
  86         threads[n] = new MyThread('+' + n);
  87         threads[n]->Run();
  88     }
  89
  90     // wait until all threads terminate
  91     for ( ;; )
  92     {
  93         wxCriticalSectionLocker lock(gs_critsect);
  94         if ( !gs_counter )
  95             break;
  96     }
  97
  98     puts("\nThat's all, folks!");
  99
 100     for ( n = 0; n < nThreads; n++ )
 101     {
 102         threads[n]->Delete();
 103     }
 104
 105     wxUninitialize();
 106
 107     return 0;
 108 }