libjava/win32.cc

   1 // win32.cc - Helper functions for Microsoft-flavored OSs.
   2
   3 /* Copyright (C) 2002  Free Software Foundation
   4
   5    This file is part of libgcj.
   6
   7 This software is copyrighted work licensed under the terms of the
   8 Libgcj License.  Please consult the file "LIBGCJ_LICENSE" for
   9 details.  */
  10
  11 #include <config.h>
  12 #include <jvm.h>
  13 #include <sys/timeb.h>
  14 #include <stdlib.h>
  15
  16 #include "platform.h"
  17 #include <java/lang/ArithmeticException.h>
  18 #include <java/util/Properties.h>
  19
  20 static LONG CALLBACK
  21 win32_exception_handler (LPEXCEPTION_POINTERS e)
  22 {
  23   if (e->ExceptionRecord->ExceptionCode == EXCEPTION_ACCESS_VIOLATION)
  24     _Jv_ThrowNullPointerException();
  25   else if (e->ExceptionRecord->ExceptionCode == EXCEPTION_INT_DIVIDE_BY_ZERO)
  26     throw new java::lang::ArithmeticException;
  27   else
  28     return EXCEPTION_CONTINUE_SEARCH;
  29 }
  30
  31 // Platform-specific VM initialization.
  32 void
  33 _Jv_platform_initialize (void)
  34 {
  35   // Initialise winsock for networking
  36   WSADATA data;
  37   if (WSAStartup (MAKEWORD (1, 1), &data))
  38     MessageBox (NULL, "Error initialising winsock library.", "Error",
  39                 MB_OK | MB_ICONEXCLAMATION);
  40   // Install exception handler
  41   SetUnhandledExceptionFilter (win32_exception_handler);
  42 }
  43
  44 // gettimeofday implementation.
  45 jlong
  46 _Jv_platform_gettimeofday ()
  47 {
  48   struct timeb t;
  49   ftime (&t);
  50   return t.time * 1000LL + t.millitm;
  51 }
  52
  53 // The following definitions "fake out" mingw to think that -mthreads
  54 // was enabled and that mingwthr.dll was linked. GCJ-compiled
  55 // applications don't need this helper library because we can safely
  56 // detect thread death (return from Thread.run()).
  57
  58 int _CRT_MT = 1;
  59
  60 extern "C" int
  61 __mingwthr_key_dtor (DWORD, void (*) (void *))
  62 {
  63   // FIXME: for now we do nothing; this causes a memory leak of
  64   //        approximately 24 bytes per thread created.
  65   return 0;
  66 }
  67
  68 // Set platform-specific System properties.
  69 void
  70 _Jv_platform_initProperties (java::util::Properties* newprops)
  71 {
  72   // A convenience define.
  73 #define SET(Prop,Val) \
  74   newprops->put(JvNewStringLatin1 (Prop), JvNewStringLatin1 (Val))
  75
  76   SET ("file.separator", "\\");
  77   SET ("path.separator", ";");
  78   SET ("line.separator", "\r\n");
  79   SET ("java.io.tmpdir", GetTempPath ());
  80
  81   // Use GetCurrentDirectory to set 'user.dir'.
  82   DWORD buflen = MAX_PATH;
  83   char* buffer = (char *) malloc (buflen);
  84   if (buffer != NULL)
  85     {
  86       if (GetCurrentDirectory (buflen, buffer))
  87           SET ("user.dir", buffer);
  88       free (buffer);
  89     }
  90
  91   // Use GetUserName to set 'user.name'.
  92   buflen = 257;  // UNLEN + 1
  93   buffer = (char *) malloc (buflen);
  94   if (buffer != NULL)
  95     {
  96       if (GetUserName (buffer, &buflen))
  97         SET ("user.name", buffer);
  98       free (buffer);
  99     }
 100
 101   // According to the api documentation for 'GetWindowsDirectory()', the
 102   // environmental variable HOMEPATH always specifies the user's home
 103   // directory or a default directory.  On the 3 windows machines I checked
 104   // only 1 had it set.  If it's not set, JDK1.3.1 seems to set it to
 105   // the windows directory, so we'll do the same.
 106   char* userHome = NULL;
 107   if ((userHome = ::getenv( "HOMEPATH" )) == NULL )
 108     {
 109       // Check HOME since it's what I use.
 110       if ((userHome = ::getenv( "HOME" )) == NULL )
 111         {
 112           // Not found - use the windows directory like JDK1.3.1 does.
 113           char* winHome = (char *)malloc (MAX_PATH);
 114           if ( winHome != NULL )
 115             {
 116               if (GetWindowsDirectory (winHome, MAX_PATH))
 117                   SET ("user.home", winHome);
 118               free (winHome);
 119             }
 120         }
 121      }
 122   if( userHome != NULL )
 123     SET ("user.home", userHome);
 124
 125   // Get and set some OS info.
 126   OSVERSIONINFO osvi;
 127   ZeroMemory (&osvi, sizeof(OSVERSIONINFO));
 128   osvi.dwOSVersionInfoSize = sizeof(OSVERSIONINFO);
 129   if (GetVersionEx (&osvi))
 130     {
 131       char *buffer = (char *) malloc (30);
 132       if (buffer != NULL)
 133         {
 134           sprintf (buffer, "%d.%d", (int)osvi.dwMajorVersion, (int)osvi.dwMinorVersion);
 135           SET ("os.version", buffer);
 136           free (buffer);
 137         }
 138
 139       switch (osvi.dwPlatformId)
 140         {
 141           case VER_PLATFORM_WIN32_WINDOWS:
 142             if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 0)
 143               SET ("os.name", "Windows 95");
 144             else if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 10)
 145               SET ("os.name", "Windows 98");
 146             else if (osvi.dwMajorVersion == 4 && osvi.dwMinorVersion == 90)
 147               SET ("os.name", "Windows Me");
 148             else
 149               SET ("os.name", "Windows ??");
 150             break;
 151
 152           case VER_PLATFORM_WIN32_NT:
 153             if (osvi.dwMajorVersion <= 4 )
 154               SET ("os.name", "Windows NT");
 155             else if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 0)
 156               SET ("os.name", "Windows 2000");
 157             else if (osvi.dwMajorVersion == 5 && osvi.dwMinorVersion == 1)
 158               SET ("os.name", "Windows XP");
 159             else
 160               SET ("os.name", "Windows NT ??");
 161             break;
 162
 163           default:
 164             SET ("os.name", "Windows UNKNOWN");
 165             break;
 166        }
 167   }
 168
 169   // Set the OS architecture.
 170   SYSTEM_INFO si;
 171   GetSystemInfo (&si);
 172   switch( si.dwProcessorType )
 173     {
 174       case PROCESSOR_INTEL_386:
 175         SET ("os.arch", "i386");
 176         break;
 177       case PROCESSOR_INTEL_486:
 178         SET ("os.arch", "i486");
 179         break;
 180       case PROCESSOR_INTEL_PENTIUM:
 181         SET ("os.arch", "i586");
 182         break;
 183       case PROCESSOR_MIPS_R4000:
 184         SET ("os.arch", "MIPS4000");
 185         break;
 186       case PROCESSOR_ALPHA_21064:
 187         SET ("os.arch", "ALPHA");
 188         break;
 189       default:
 190         SET ("os.arch", "unknown");
 191         break;
 192     }
 193 }
 194